ceiling diffusers - tom barrow company

Delivering HVAC Solutions &Outstanding Customer Service Since 1955

2018 Product Catalog

THIS INFORMATION IS PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND BY ANY PERSON, INCLUDING WITHOUT LIMITATION, THE OWNER AND THE PUBLISHER.

ALL SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

Copyright © 2018Tom Barrow Company, Inc.

PLEASE NOTE THAT ALL PRODUCTS IN THIS CATALOG MAY NOT BE AVAILABLE

AT ALL LOCATIONS.

The mission of TBCo’s Green Team is simple – invest in planet Earth. Together, we can all do our part by implementing the 3 R’s into our everyday routine.

REDUCE Determine and implement ways to reduce solid waste

and the consumption of energy and water.

REUSE Choose reusable over disposable when possible. Even small changes can make an overall impact.

RECYCLEIncrease our office waste recycling.

1

Ceiling DiffusersUnit # 3708025

Models PDDR and PDF

Ceiling DiffusersFor variable air volume (VAV), heating and cooling applications. Featuresheavy-gauge steel backpan with perforated face (3/16” dia. holes on 1/4”staggered centers). Discharge pattern can be adjusted to 1-, 2-, 3- or 4-way horizontal throw by rotating pattern controllers after unlatching anddropping face panel. White finish.

Diffusers w/ Steel Face Panel

* Black Back Pan

Diffusers w/ Aluminum Face Panel

Unit # 3708026

Curved Blade – Lay-In – Models PDC and APDC

Features heavy-gauge steel backpan with perforated flush face (3/16”dia. holes on 1/4” staggered centers). Discharge pattern can be adjustedto 1-, 2-, 3- or 4-way horizontal or vertical throw by moving curved deflec-tor blades after unlatching and dropping face panel. Round neck; 24” x24” face panel. White finish.

Face Mount. Size In.No. Style Type Neck Face

Flush Surface 22 x 22 24 x 24Flush Lay-In 6 (Dia.) 12 x 12Flush Lay-In 6 (Dia.) 24 x 24Flush Lay-In 8 (Dia.) 24 x 24Flush Lay-In 10 x 10 12 x 12Flush Lay-In 10 (Dia.) 24 x 24Flush Lay-In 12 (Dia.) 24 x 24Flush Lay-In 14 (Dia.) 24 x 24Flush Lay-In 16 (Dia.) 24 x 24Flush Lay-In 22 x 10 24 x 12Flush Lay-In 22 x 22 24 x 24

Flush Lay-In 6 (Dia.) 12 x 12Flush Lay-In 6 (Dia.) 24 x 24Flush Lay-In 8 (Dia.) 24 x 24Flush Lay-In 10 (Dia.) 20 x 20Flush Lay-In 10 (Dia.) 24 x 24Flush Lay-In 12 (Dia.) 20 x 20Flush Lay-In 12 (Dia.) 24 x 24Flush Lay-In 14 (Dia.) 24 x 24Flush Lay-In 16 (Dia.) 24 x 24Flush Lay-In 6 (Dia.) 24 x 24Flush Lay-In 8 (Dia.) 24 x 24Flush Lay-In 10 (Dia.) 24 x 24Flush Lay-In 12 (Dia.) 24 x 24Flush Lay-In 14 (Dia.) 24 x 24Flush Lay-In 16 (Dia.) 24 x 24

Flush Lay-In 22 x 22 24 x 24


Flush Lay-In 6 (Dia.) 24 x 24Flush Lay-In 8 (Dia.) 24 x 24Flush Lay-In 10 (Dia.) 24 x 24Flush Lay-In 12 (Dia.) 24 x 24Flush Lay-In 14 (Dia.) 24 x 24


Flush Lay-In 6 (Dia.) 24 x 24Flush Lay-In 8 (Dia.) 24 x 24Flush Lay-In 10 (Dia.) 24 x 24Flush Lay-In 12 (Dia.) 24 x 24Flush Lay-In 14 (Dia.) 24 x 24Flush Lay-In 16 (Dia.) 24 x 24

Flush Lay-In 6 (Dia.) 24 x 24Flush Lay-In 8 (Dia.) 24 x 24Flush Lay-In 10 (Dia.) 24 x 24

Serving the Southeastwith 10 locations in

Georgia, Florida,Tennessee and Alabama!

2

Ceiling DiffusersUnit # 3708027

Star Pattern – Lay-In – Model PDS

Generates high induction pattern for maximum throw at lower noise andpressure drop levels than curved-blade designs. Features heavy- gaugesteel backpan with hinged perforated face (3/16” holes on 1/4” staggeredcenters). Airflow pattern can be adjusted for side or corner blow, horizon-tal or vertical. 24” x 24” flush face. White.

Diffusers With Steel Face Panel

Unit # 3708028

Return – Lay-In

For return/exhaust applications. Features heavy gauge steel constructionwith perforated flush face (3/16” holes on 1/4” staggered centers)Installed appearance matches Series PDF supply diffusers. White.

Unit # 3708001

Unit # 3708034

Square – Non-Insulated – Models SCD3, ASCD3, and SCDA3

Three-cone design provides 360° horizontal discharge and protects ceil-ing from streaks and smudges. Maintains effective room air distribution invariable air volume (VAV) systems. Cones feature one-piece die-stampedconstruction with no corner joints; inner cones remove as single unit forcleaning. White finish.Fixed Discharge. Horizontal pattern only.Adjustable Discharge. Features movable vanes for changing patternfrom horizontal to vertical.

Steel Diffusers

Aluminum Diffusers

Plastic (Resin) Diffusers

No.FaceStyle

MountType

NeckDia. In.

FaceSize In.

Flush Lay-In 6 24 x 24Flush Lay-In 8 24 x 24Flush Lay-In 10 24 x 24Flush Lay-In 12 24 x 24Flush Lay-In 14 24 x 24Flush Lay-In 16 24 x 24

No.FaceStyle

MountType

NeckDia. In.

FaceSize In.

Flush Lay-In *** 12 x 24Flush Lay-In *** 24 x 24

Let TOM BARROW CO.be the first stop for

all your product needs!

No.Discharge

TypeMountType

NeckDia. In.

FaceSize In.

Adjustable Lay-In 6 24 x 24Adjustable Lay-In 8 24 x 24Adjustable Lay-In 10 24 x 24Adjustable Lay-In 12 24 x 24Adjustable Lay-In 14 24 x 24

Fixed Lay-In 6 12 x 12Fixed Lay-In 6 24 x 24Fixed Lay-In 8 12 x 12Fixed Lay-In 8 24 x 24Fixed Lay-In 10 20 x 20Fixed Lay-In 10 24 x 24Fixed Lay-In 12 24 x 24Fixed Lay-In 14 24 x 24

No.Discharge

TypeMount.Type

NeckDia. In.

FaceSize In.

Fixed Lay-In 6 24 x 24Fixed Lay-In 8 24 x 24Fixed Lay-In 10 24 x 24Fixed Lay-In 12 24 x 24Fixed Lay-In 14 24 x 24

No.Discharge

TypeMount Type

Neck Dia. In.

FaceSize In.


Tampa

Fixed Lay-In 6 12 x 12

3

Ceiling Diffusers & DampersUnit # 3708043

Square – Insulated – Models SCD3R6 and ASCD3R6

Ceiling Diffusers & DampersThree-cone design for lay-in applications. Provides 360° horizontal dis-charge and protects ceiling from streaks and smudges. Maintains effec-tive room air distribution in variable air volume (VAV) systems. Conesfeature one-piece die-stamped construction with no corner joints; innercones remove as single unit for cleaning. Includes factory installed R-6foil-backed insulation blanket. 24” x 24” face. White.

Steel Diffusers

Aluminum Diffusers

Unit # 3708040

Square – Non-Insulated – Model SCD4

Features 4-cone design. Face measures 24” x 24”. Steel constructionwith white enamel finish.

Unit # 3708019

Model VCR9

For use in flexible duct or where height is limited. Gang-operated design;blades slide at right angles to airflow. Mounts in diffuser neck, flush withtop. Measures 1” D. Adjusts from face side of diffuser.

Unit # 3708020

Model VCR7Gang-operated design. Three sets ofblades distribute air evenly. Adjusts fromface side of diffuser. Can be mounteddirectly to diffuser before installation;requires #8 sheet metal screws (notincluded).

No.Discharge

TypeMountType

NeckDia. In.

FaceSize In.

Fixed Lay-In 6 24 x 24Fixed Lay-In 8 24 x 24Fixed Lay-In 10 24 x 24Fixed Lay-In 12 24 x 24Fixed Lay-In 14 24 x 24Fixed Lay-In 15 24 x 24

No.Discharge

TypeMountType

NeckDia. In.

FaceSize In.

Fixed Lay-In 6 24 x 24Fixed Lay-In 8 24 x 24Fixed Lay-In 10 24 x 24Fixed Lay-In 12 24 x 24

INTEGRITY.It’s in everything we do.

No.Discharge

TypeMountType

NeckDia. In.

FaceSize In.

Fixed Lay-In 6 24 X 24Fixed Lay-In 8 24 X 24Fixed Lay-In 10 24 X 24Fixed Lay-In 12 24 X 24Fixed Lay-In 14 24 X 24

No.Fits DiffuserNeck Dia. In.

68101214

No.Fits DiffuserNeck Dia. In.

68101214

4

Ceiling Diffusers

Unit # 3708024

Square Plaque Diffuser – Lay-In – Model SPD and ASPDCeiling Diffusers

For variable air volume (VAV) sys-tems. Provides tight, horizontal 360°air pattern for effective distributionover wide range. Features curvedbackpan and removable face panelwith radiused edges. White.

Unit # 3708033

Round – Model RCDE and ARCD

For heating and cooling applications. Three-cone design provides 360°horizontal discharge. Pattern can be altered by adjusting position of twoinner cones; position 1 provides maximum capacity, while position 2 pro-vides increased air induction. White.

Unit # 3708031

Louvered Face – Models SMD and AMD

Designed to visually complement modular ceilings. Provides consistentflow pattern throughout CFM range; ideal for use in variable air volume(VAV) systems. 22-ga. metal border with removable core. White finish.Fixed Discharge. Horizontal pattern only.Adjustable Discharge. Features movable vanes for changing patternfrom horizontal to vertical.

For Model AMD with Insulated Back

No.Discharge

TypeMountType

NeckDia. In.

FaceSize In.

Fixed Lay-In 6 12 x 12Fixed Lay-In 6 24 x 24Fixed Lay-In 8 12 x 12Fixed Lay-In 8 24 x 24Fixed Lay-In 10 24 x 24Fixed Lay-In 12 24 x 24Fixed Lay-In 14 24 x 24


Dia. InchesAOtelnI.oN

6 11-1/88 14-3/410 18-1/412 2214 26

6 11-1/88 14-3/410 18-1/412 2214 2616 26

No.Discharge

TypeMountType

NeckDia. In.

FaceSize In.

Fixed Lay-In 6 24 x 24 Fixed Lay-In 8 24 x 24 Fixed Lay-In 10 24 x 24 Fixed Lay-In 12 24 x 24 Fixed Lay-In 14 24 x 24 Fixed Lay-In 16 24 x 24

Fixed Lay-In 18 x 18 24 x 24 Fixed Beveled Drop Face 6 x 6 10 x 10Fixed Beveled Drop Face 9 x 9 13 x 13Fixed Beveled Drop Face 12 x 12 16 x 16Fixed Beveled Drop Face 15 x 15 19 x 19Fixed Beveled Drop Face 18 x 18 24 x 24 Fixed Surf Mnt 6 x 6 10 x 10Fixed Surf Mnt 9 x 9 13 x 13

Adjustable Lay-In 6 x 6 24 x 24Adjustable Lay-In 9 x 9 24 x 24Adjustable Lay-In 12 x 12 24 x 24Adjustable Lay-In 15 x 15 24 x 24Adjustable Lay-In 18 x 18 24 x 24

Fixed Lay-In 6 x 6 24 x 24Fixed Lay-In 9 x 9 24 x 24Fixed Lay-In 12 x 12 24 x 24Fixed Lay-In 15 x 15 24 x 24Fixed Lay-In 18 x 18 24 x 24Fixed Beveled drop face 6 x 6 10 x 10Fixed Beveled drop face 9 x 9 13 x 13Fixed Beveled drop face 12 x 12 16 x 16Fixed Beveled drop face 15 x 15 19 x 19Fixed Beveled drop face 18 x 18 24 x 24

No.Neck

Size In.10" RND12" RND

Black 12" RND

T

Fixed Lay-In 12 x 12 24 x 24

5

Ceiling Diffusers, Grilles & Dampers

Cores Only for Model SMD

Unit # 3708030

Model STG

Ceiling Diffusers, Grilles & DampersFor use in doors and partitions. 20-ga. V-shaped steel blades block visionand increase strength. Countersunk screw holes for #8 sheet metalscrews (included). Satin aluminum finish. Includes auxiliary frame.

Unit # 3708017

For Use With Square Neck Diffuser – Model VCSI3

For use with square neck diffusers. Lever operated; blades regulate air-flow and ensure even air distribution. Steel construction with mill finish.Measures 2-3/8” D. Mounts directly to diffuser neck using sheet metalscrews (not included).

Unit # 3708023

Slot Diffusers – Models SDS75 and SDS100

Diffusers & PlenumsFor use in variable air volume (VAV) systems; projects uniform blanket ofair at low flow rate. Features 180° pattern controller adjustment for regula-tion of discharge direction and volume. Extruded aluminum constructionwith white finish; black steel pattern controllers.6 Foot field-cut design. For use when required length is not known untilinstallation and more than 6” of trimming is required. Pre-punched sidesensure alignment of spacers for rigidity during and after cutting.

No. Discharge Type Size In.1 Way 6 x 6

2 Way, Corner Blow 6 x 62 Way, Opposing 6 x 6

3 Way 6 x 61 Way 9 x 9


3 Way 9 x 91 Way 12 x 12


3 Way 12 x 121 Way 15 x 15


3 Way 15 x 151 Way 18 x 18


3 Way 18 x 183 Way Black 12 x 124 Way Black 12 x 12

No. Size In.12 x 1214 x 814 x 1416 x 1618 x 1218 x 1824 x 1224 x 1824 x 24

Alum/White 12 x 12Alum/White 18 x 12Alum/White 18 x 18Alum/White 24 x 24

No.SizeIn.

6 x 68 x 89 x 9

12 x 1215 x 1518 x 1822 x 22

No.No.

SlotsSlot

Sz. In.Lgth.

Ft.1 0.75 42 0.75 41 1 42 1 42 0.75 61 1 62 1 6

6

Plenums & Diffusers

Unit # 3683008

Model UPL 75 and UPL 100For use in slot diffusers. Features uni-versal endcap design; lower portioncan be folded up for continuous appli-cations. 24-ga. steel construction.Measures 9” high.

* PRODUCT STOCKED IN NASHVILLE WAREHOUSE ONLY

Unit # 3683001

Model TBDIT-bar lay-in design for use invariable or constant-volumeheating or cooling systems.24-ga. steel construction withaluminum vane. Vane adjustsfor left, right or vertical throw.1-1/2” slot width. Black finish.2-Slot. Features black centertee.

Diffusers

Model TBDIPFSurface mount frame allows diffuser tobe installed in sheetrock or plaster ceil-ings. Extruded aluminum constructionwith white finish.

Unit # 3683006

Model BS

Plenums & DiffusersT-bar lay-in design. Features 24-ga. steel construction with mechanicallysealed seams and black finish on exposed surfaces. Wiper blade stylepattern controller with felt seal provides adjustability. 8” inlet diameter.

Unit # 3359001

Adjustable Slot – Model K-1002-slot design. For T-bar lay-in orhard ceiling applications. Fea-tures 24-ga. steel constructionwith extruded aluminum air pat-tern controller and 1/2” fiber linerinsulation. Measures 48” L x4-1/8” W x 11-5/8” H. Black finish.

Unit # 3683005

Perforated

22-ga. steel construction with 51%open area. Features 1/2” flangesfor rigidity. Black.

No.LengthInches

For SlotDiffuser Model

InletSize (Inches)

48 P-SDS75-1-4 848 P-SDS75-1-4 1048 P-SDS75-2-4 848 P-SDS75-2-4 1048 P-SDS100-1-4 848 P-SDS100-1-4 1048 P-SDS100-2-4 848 P-SDS100-2-4 1047 *P-SDS100-2-47 847 *P-SDS100-2-47 10

No.Lgth.

In.No.

SlotsInlet

Size In.48 x 2-1/2 x 8 1 8

24 x 5 x 8 2 848 x 5 x 8 2 8

48 x 5 x 10 2 10

No.For Use

w/ DiffuserP-TBDI4-2-24-8P-TBDI4-1-48-8

P-TBDI4-2 48-9 or 10

No.Inlet

Size In.Dim. In.W x L

61/31-2 X 42861/31-2 X 63861/31-2 X 848

No.Inlet

Sz. In.InletType

dnuoR8lavO01

No.Dim. In.W x L

2.5 X 482-13/16 X 48

5 X 48

Tampa

7

Supply GrillesUnit # 3683007

Unit # 3708002

Double Deflection – Model 620DF

For high humidity areas. Features adjustablealuminum blades with 3/4'' spacing, surfacemount border, countersunk screw holes andsteel opposed bladed damper. White.

Supply Grilles

Unit # 3708003

Double Deflection – Model 520DF

Features adjustable steel blades with 3/4'' spac-ing, surface mount border, countersunk screwholes and steel opposed-blade damper. White.

Surface Mount – Model ACVD

Curved blade directional grilles feature individu-ally adjustable curved blades for direct supplyair precisely to suit the desired application.

* PRODUCT STOCKED IN NASHVILLE WAREHOUSE ONLY

No.Duct

Size In.6 x 68 x 48 x 68 x 8

10 x 610 x 810 x 1012 x 612 x 812 x 1012 x 1214 x 614 x 814 x 1014 x 1216 x 616 x 818 x 618 x 818 x 1018 x 1220 x 620 x 820 x 1020 x 1224 x 624 x 824 x 1024 x 12

No.Duct

Size In.6 x 68 x 68 x 8

10 x 610 x 810 x 1012 x 612 x 812 x 1012 x 1214 x 614 x 814 x 1014 x 1216 x 616 x 818 x 618 x 818 x 1018 x 1220 x 620 x 820 x 1020 x 1224 x 624 x 824 x 1024 x 1224 x 1424 x 1830 x 630 x 830 x 1030 x 1236 x 636 x 836 x 1036 x 12

No.Directional

BlowDim.In.

1 WAY 8X41 WAY 10X61 WAY 10X81 WAY 12X61 WAY 12X81 WAY 14X64 WAY 6X64 WAY 8X84 WAY 10X104 WAY 12X124 WAY 14X14

Our customer service department has the answers you need!

SPIRAL DUCT GRILLES

No.Duct

Size In.P-SDG-1206 12 x 6P-SDG-1804 18 x 4P-SDG-1806 18 x 6P-SDG-2006 20 x 6P-SDG-2606 26 x 6

8

Return GrillesUnit # 3708005

45° Deflection – Lay-In – Models 630DTB and 630TB

Return GrillesAluminum construction with white finish.

Unit # 3708042

45° Deflection – Lay-InModel 630FFTB

Features 3/4” louver spacing, 1” filter frame and1/4-turn fasteners. Aluminum construction withwhite finish.

Unit # 3708009

Unit # 3708006

45° Deflection – Surface Mount –Model 530F

Features steel blades with 3/4'' spacing, rein-forced corners and countersunk screw holes.White.

Unit # 3708008 45° Deflection – Lay-InModel 530TB

Features steel blades with 3/4'' spacing andreinforced corners. White.

Unit # 3708008

45° Deflection – Model 530FFTB

Features steel blades with 3/4'' spacing andreinforced corners. White.

Unit # 3708004

45° Deflection – Surface Mount Model 630F

For high humidity areas. Features aluminumblades with 3/4'' spacing, surface mount borderwith reinforced corners and countersunk screwholes. White.

No.Size In.

Neck Face

22 x 10 24 x 1222 x 22 24 x 2446 x 22 48 x 24

22 x 10 24 x 1222 x 22 24 x 24

22 x 22 24 x 24

Size In.No. Module Filter

24 x 24 20 x 20

No.Duct

Size In.

6 x 68 x 810 x 610 x 10

12 x 612 x 8

12 x 1012 x 1214 x 614 x 8

14 x 1014 x 1214 x 1416 x 616 x 8

16 x 1016 x 1216 x 1416 x 1618 x 1018 x 1218 x 1618 x 1820 x 1020 x 1220 x 1620 x 2024 x 624 x 8

24 x 1224 x 1824 x 2430 x 1230 x 1830 x 2430 x 3036 x 1236 x 1836 x 2436 x 3648 x 2448 x 3648 x 48

Size In.No. Neck Face

22 x 10 24 x 12

No.Duct

Size In.22 x 22 24 x 24


20 x 20 24 x 24

No.Duct

Size In.

6 x 68 x 8

10 x 1012 x 1214 x 1416 x 1618 x 1824 x 1224 x 24

6 x 68 x 48 x 68 x 810 x 610 x 810 x 1012 x 612 x 812 x 1012 x 1214 x 1416 x 1618 x 1218 x 1820 x 2024 x 1224 x 24


T

9

Dampers, Grilles, Baffles & TerminalsUnit # 3708014

For Models 520, 620, 530, 630 and 80F

Dampers, Grilles, Baffles & TerminalsSlot operated design. Neck-mounted; uses S-clips foreasy installation andremoval. Galvanized steelconstruction with mill finish.For use with Series 520,530 and 80F dampers.Measures 1-5/8” D.

Unit # 3708010

Surface Mount – Model 80F

Features 1/2” x 1/2” x 1/2” aluminum grid core;aluminum frame with countersunk screw holes.Baked white enamel finish.

Unit # 3708011

Lay-In – Model 80TB

Features 1/2” x 1/2” x 1/2” aluminum grid core andaluminum frame. Baked white enamel finish.

Unit # 3708013

Filter – Lay-In – Model 80FFTB

Features 1/2” x 1/2” x 1/2” aluminum egg cratecore with 1” steel filter frame. White.

Unit # 3708035

Lay-in design for installing grilles, diffusers,lights, speakers and other components in plas-ter or sheetrock ceilings. Aluminum constructionwith adjustable fastening clips. Can also be sus-pended from building structure.

Unit # 3708029

Model SB

For closing off diffuser inlet quadrants toachieve specific air pattern. 90° angle; fits roundneck diffusers. Steel construction with black fin-ish. Installs inside diffuser neck using #8 sheetmetal screw (not included).

Unit # 3708021

Single Duct – Model SDV and SPVVAV Terminals & Controls

Regulates airflow to zone according to tempera-ture requirements. Features Aero-Cross™velocity sensor for control of low flow rates.Beaded inlet provides consistent roundness andreduced leakage. Damper design smoothes air-flow to reduce sound and leakage levels; fea-tures Delrin bearings and 1/2” diameter shaftwith position indicator. 1/2” dual density fiber-glass-free insulation resists erosion at surfacevelocities up to 5000 FPM. 22-ga. housing withslip and drive discharge connection. Measures15-1/2” L.

No.SizeIn.

6 x 68 x 8

10 x 1012 x 1214 x 1416 x 1618 x 1822 x 1022 x 2224 x 1224 x 24

No.Duct

Size In.

6 x 68 x 8

10 x 1012 x 1012 x 1214 x 1416 x 1618 x 1218 x 1824 x 1224 x 2436 x 2448 x 24

6 x 68 x 8

10 x 1012 x 1214 x 1416 x 1618 x 1218 x 1824 x 24

No.Size In.

Neck Face

10x10 24 x 2412x12 24 x 2422x10 24 x 1222x22 24 x 2446x22 48 x 2410x10 12 x 12

22x22 24 x 24

No.Size In.

Neck/Filter Face20 x 8 24 x 1220 x 20 24 x 24

No.Dimension

In.12 x 1212 x 2424 x 2448 x 24

No.For DuctDia. In.

WidthIn.

6 38 4

10 512 6

No.Max.CFM

InletSize In.

450 6800 81350 102100 123000 144000 16

450 6800 81350 102100 123000 144000 16

10

Coils, Controls & Return GrillesUnit # 3708018

Two-Row

For use with Series ESV VAV boxes. Featuresaluminum fin and copper tube construction.

Unit # 3708037

Model CP101

The CP101 pneumatic controller is the mostversatile pneumatic controller available. Thisunique controller maintains the air flow dictatedby the thermostat while compensating forchanges in duct static pressure. The air flowcontrol is pressure independent.

Controls

Unit # 3670001

Therma-Fuser™ – Model TFHC

Features built-in heating and cooling thermo-stats, actuator and damper. Variable Air Volumedesign regulates discharge opening in relationto air volume, providing constant velocity,improved room air movement and uniform tem-perature distribution. Automatic changeoverbetween heating and cooling modes. Tempera-ture setpoint 70°F to 78°F; ±1.5°F accuracy. Dif-fuser measures 24” x 24”.

Unit # 3683009

Ducted – Eggcrate – Model 80SR

For lay-in installations. Features aluminum egg-crate grille (1/2” x 1/2” grid) with built-in 24-ga.steel plenum. 2-1/2” high beaded collar pro-vides secure duct connection. White.

Lay-In – Model ECIR

Features extruded aluminum frame, insulatedfiberglass backpan and 1/2” x 1/2” x 1/2” alumi-num grid face. Face swings down to allowaccess to 20” x 20” x 1” filter (not included).Dual locking arms and concealed hinges.Accepts round duct connections up to 16”diameter.

Unit # 3673002

Lay-In – Model ECIRNFReturns high airvolumes with mini-mal pressure loss.Features extrudedaluminum framewith 1/2” x 1/2” x1/2” aluminum gridface. Fiberglassbackpan featuresfoil vapor barrierand accommo-dates round ductconnections from6” to 14” diameter.

Open Cell – Plastic – Model ECP

Coils, Controls & Return GrillesImproves ventilation, lowers operating tempera-tures and increases ballast life. Designed torepel dust accumulation. Single-piece, injectionmolded design. Ship-lap fit provides uniformappearance on joined panels.

No.For VAV Size In.

6810121416

No.Air Press.

PSIAir Vel.

FPM15-25 0-3000

Delivering HVAC SolutionsSince 1955!

No.Inlet

OD In.681012

No.Duct

Dia. In.

81012141618

6810

No.Dim. In.

L x W x H24 x 24 x 3-1/2

No.Dim. In.

L x W x H24 x 24 x 3-1/2

No.Dim.In.

24 x 1224 x 2424 x 48

Tampa

11

Grilles, Ceiling Diffusers & Flexible DuctUnit # 3675001

Aluminum – Model ECA

.016” rigid alumi-num constructionresists damagefrom handing andinstallation. Foruse in air supplyand return open-ings, signs, dis-plays, fluorescentfixtures and light-ing applications.

Unit # 2192001

Round – AirMate™

Grilles, Ceiling Diffusers & Flexible DuctFeatures concentric ring design for maximumperformance; ideal for variable air volume (VAV)systems. Steel construction with white finish.

Diffusers – Model 800

Butterfly Dampers – Model 800D

Controls volume without restricting perfor-mance. Galvanized steel construction withremovable operator.

Unit # 2828001

Insulated – Series 18

For use in air distribution systems, connectingducts, room inlets or terminal devices. Puncture-resistant. Features flexible corrugated aluminumcore with watertight lock seams, wrapped infiberglass insulation blanket with metalized poly-ester jacket. Bends easily; maintains shape with-out sagging. Max. velocity 5000 FPM. 8-ft.length. R-value 4.2. UL 181 compliant.

Unit # 2828002


For use as supply or return duct in low tomedium pressure systems, or as connection tomixing boxes, diffusers, room inlets or terminaldevices. Puncture-resistant. Features encapsu-lated steel wire helix core wrapped in multiplelayers of fiberglass insulation with metalizedpolyester jacket. Max. velocity 5000 FPM. 25-ft.length. UL 181 compliant.

Unit # 2828003


For use as supply or return duct in low tomedium pressure systems, or as connection tomixing boxes, diffusers, room inlets or terminaldevices. Features encapsulated steel wire helixcore wrapped in fiberglass insulation blanketwith puncture-resistant gray polyester jacket.25-ft. length. Max. velocity 5000 FPM. R-value4.2. UL 181 compliant.

No.Dim.In.

24 x 1224 x 2424 x 48

No.Dim. In.Dia. x H

6 x 1-1/168 x 1-1/410 x 1-1/212 x 1-1/214 x 1-3/4

No.For Diffuser

Dia. In.68

101214

No.Dia.In.678910121416

No.Dia.In.

68

10121416

1820

67891012141618

4567891012141618

No.Dia.In.456789101214161820

No.Dia.In.

12

Flexible Duct & Accessoriesnit # 1011001

Noninsulated – Type SLD

For use in low- and medium pressure heatingand cooling systems. Features metalized filmlaminate permanently bonded to spring steelwire helix. Mold, mildew and corrosion resistant.Easily shaped to fit oval inlets and connections.Pressure rating +10” to -1” WG; velocity rating5000 FPM. 25-ft. length. UL181 listed; NFPA90A & 90B compliant.

Unit # 3687003

Non-Insulated – Type NI55

Features aluminum foil, fiberglass and alumi-nized polyester laminate construction. Pressurerated to +6” and -4” w.g. Rated velocity 4000FPM. Operating temperature -20°F to 250°F.UL 181 Class 1 listed.

Flexible Duct & Accessories

Unit # 3687005

Insulated & Acoustical 1M

For low to medium pressure HVAC systemsrequiring mid-range sound levels. Manufacturedto meet the highest quality standards instrength, permeability, and fire resistance. Fab-ricated with an acoustically transparent PE orCPE inner film which allows mid-range sound topenetrate the duct wall. Pressure rated to +10and -5 w.g. (18" and 20" to -1 w.g.) Velocity rat-ing 5500 FPM, Teperature range -20°F to250°F, UL 181 Class 1.

Unit # 9999003

Thick blanket of glass fiber with a vapor barrieron one side which prevents condensation andthermally insulates.

Unit # 1012001

For use on ducts, pipes, return air duct pans,refrigeration equipment and crawlspaces, asacoustical insulation or water heater jacketing.Helps stop heat loss and provides barrieragainst radon and vapor. Lightweight. Resistsmold and mildew. Environmentally safe; installa-tion does not require respirator or protectiveclothing. Thermal rating of R-5.6 with spacer, R-4 without spacer. Meets federal and state build-ing codes. ASTM certified.

Unit # 1012006

Required with HVPB duct wrap to achieve max-imum R-value rating.

No.Dia.In.4568101214

No.Lgth.

Ft.Dia.In.

25 425 625 825 1025 12

No.Dia.In.

45678

101214161820

68

101214

Unit # 9999003

16

Not all the productswe carry are listed

in this catalog. If you don’t see what

you’re looking for, please contact

your local branch for assistance.

No.Dim. In.

W x Thick.Lgth.

Ft.48 x 2 75

No.Dim. In.

W x Thick.Lgth.

Ft.48 x 5/16 50

No.Dim.W x L

LinearFt./Roll

RollsPer Case

2” x 25’ 25 6

Tampa

1MR616

13

Flexible Duct, Snaplock Pipe & Elbows

Unit # 3680016

Flexell – Model 105

For use in bathroom exhaust and similar applications. Constructed from.005” thick aluminum alloy with triple-lock seams. -60°F to +600°F tem-perature rating; 5500 FPM velocity rating. 8-ft. length. UL 181 Class 0listed.Note: Not recommended for range hood applications.

26 Ga.

Galvanized steel construction.

Flexible Duct, Snaplock Pipe & Elbows

Unit #

Unit # 3702003

Packed 10 pieces per bundle.

Unit # 3680011

Unit # 3702001

90° – Adjustable

Unit # 3680010

90° – Adjustable – #111Galvanized steel construction.

No.Dia.In.4681012

No.Lgth.

In.Dia.In.

Pkg.Qty. Ft.

60 4 5060 6 5060 8 5060 10 3060 12 3060 14 30

Our daily objective is to meet and greet our

customers in a prompt, kind and courteous

manner.

No. GaugeLgth.

In.Dia.In.

30 60 430 60 530 60 630 60 730 60 830 60 930 60 1030 60 1228 60 1428 36 1626 36 1826 36 20

No. GaugeDia.In.

BundledQuantity

30 4 1230 5 1230 6 1230 7 1230 8 1230 9 1230 10 628 12 628 14 426 16 426 18 426 20 4

No.Dia.In. Ga.

Ctn.Qty.

4 26 126 26 128 26 1210 26 812 26 414 26 416 24 418 24 4

14

Reducers, Wyes & Tees

Unit # 3702005

Snaplock

No crimp.

Reducers, Wyes & Tees

Unit # 3702007

Snaplock

Full flow design.

Unit # 3702006

Snaplock

Unit # 3702004

Snaplock

Round.

nit # 3702008

For use with ductboard.

U

Unit # 3680007

Tabbed – w/ Gasket

For 1” and 1-1/2” ductboard. Includes therma-seal gasket.

Unit # 3702002

No holes.

No. Gauge Dia. In.30 8 x 630 10 x 828 12 x 1028 14 x 1228 15 x 1428 16 x 14

No. Gauge Dia. In.28 12 x 10 x 1028 10 x 8 x 830 8 x 6 x 6

Don’t see it here?We can get it for you.

Call us!

No. GaugeDia.In.

30 630 828 1028 12

No. GaugeDia.In.

30 630 828 1028 12

No.Dia.In.68101214

No.Dia.In.6810121416

No. Ga.Lgth.

Ft.26 100

T

15

Spin-In Collars

Unit # 3680008

Twist Lock

For use on 1-1/2” ductboard. Includes scoop and damper.

Spin-In Collars

Unit # 3680005

For use on sheet metal duct. Includes damper and stand-off.

Unit # 3680006

Model 3726

For use on sheet metal duct. Includes scoop and damper.

No.Dia.In.467891012141618

No.Dia.In.6810121416

No.Dia.In.4567891012141618

681012141618

We welcome the opportunity to quote on

any special tools or equipment which you

may require.

16

Collars, Reducers & TakeoffsUnit # 3687004

w/ Scoop & Damper – Model FLDE

Collars, Reducers & TakeoffsFor use on sheet metal duct. Features 26-ga. construction with deep spingroove for secure hold.

Unit # 3687001

w/ Damper – Model FLDFor use on sheet metal duct. Features 26-ga. construction with deep spin groove forsecure hold.

Unit # 3680009

Tapered – Model CR265

Unit # 3680003

Conical – Model 3210DS

For commercial duct applications. Galvanized steel construction with con-tinuous-weld seam to prevent air leakage. Features therma-seal gasketring. Damper handle standoff allows use with blanket-type insulation.

Unit # 3680002

Conical – Spin-In – Model 3200DS

For commercial duct applications. Galvanized steel construction with con-tinuous-weld seam to prevent air leakage. Features damper handlestandoff for use with blanket-type insulation.

Takeoffs, Saddle Straps & Dampers

No.Dia.In.68

10121416

No.Dia.In.6810121416

No.Dia.In.

8 x 610 x 812 x 10

No.Dia.

.aG.nI8268286201622162414261

No.Dia.

.aG.nI8268286201622162414261

Tampa

17

Takeoffs, Saddle Straps & Dampers

Unit # 3680004

Rectangular to Round – Model 3300DS

For commercial duct applications. Galvanized steel construction with con-tinuous-weld seam to prevent air leakage. 45° design with gasket flange.Damper handle standoff allows use with blanket-type insulation.

Unit # 3680014

45° – Gasketed – Model AT-500

Features galvanized steel construction with continuous-welded seamsand 1” wide gasketed flange with pre-drilled screw holes.

Unit # 3680004

Rectangular to Round – Model AT-502 w/Damper

For commercial duct applications. Galvanized steel construction with con-tinuous-weld seam to prevent air leakage. 45° design with gasket flange.Damper handle standoff allows use with blanket-type insulation.

Note: AT-500 and AT-502 stocked in Smyrna warehouse only.

Unit # 3702009

Galvanized sheet metal construction with fire-retardant polyethylene foamgasket. Includes scoop and damper.

No.Dia.In.678910121416

Dim. In.No. Dia. Rect. Open. Ht.

6 12 x 6 8-1/28 12 x 6 8-1/2

10 16 x 6-3/4 9-1/212 18 x 8-1/2 10-1/214 20 x 9-1/2 10-1/2

16 24 x 12 10-1/2

No.Dia.In.6810121416

No. Dia. In. GaugeFor PipeDia. In.

6 30 8 to 128 30 10 to 14

10 30 12 to 1612 28 14 to 1814 28 16 to 20

18

Dampers, Reducers & TakeoffsUnit # 3692007

Round

Features 28-ga. steel construction. Includesquadrant.

Unit # 3692005

Short – Model SR

28-ga. steel construction.

Stick-On – Standard – Model S0-S1

For use on sheet metal or fiberglass trunk duct.Galvanized steel construction with adhesivebacking for airtight seal. Eliminates need forjoint taping and exact hole sizing.

Dampers, Reducers & Takeoffs

Unit # 3692002

Stick-On – w/ Damper – Model S0-S3


Unit # 3692003

Stick-On – w/ Scoop & Damper –Model S0-S4


No.Model

No.Dia.In.

D-1-06 6D-1-08 8D-1-10 10D-1-12 12D-1-14 14D-1-16 16D-1-18 18D-1-20 20

No.Dia.In.

6 x 46 x 58 x 68 x 7

10 x 810 x 912 x 812 x 1014 x 1216 x 1416 x 15

No.Dia.In.456789101214161820

Not all the productswe carry are listed

in this catalog. If you don’t see what

you’re looking for, please contact

your local branch for assistance.

No.Dia.In.68101214161820

No.Dia.In.68101214161820

Tampa

19

TransitionsUnit # 3683002

Square to Round – Model SRBN

24-ga. steel construction. Features 2-1/2” deepcollar with raised bead for secure connections.Black painted interior.

Transitions

Blank Cans

TTransitions

Unit # 3680015

Rectangular to Round – Model 666B

26-ga. galvanized steel construction. 6” height.Notes: Rectangular body is 3/16” oversized tofit over grille neck; round collar is 1/8” under-sized with bead to accept pipe or flexible duct.

Unit # 3692004

Square to Round – Model TR3

28-ga. galvanized steel construction; riveteddesign.

No.Base

Dim. In.Inlet

Dia. In.

6X6 68X8 68X8 89X9 8

10X10 610X10 810X10 1012X12 612X12 812X12 1012X12 1215X15 1416X16 1618X18 1622X10 622X10 822X10 1022X22 622X22 822X22 1022X22 1222X22 1422X22 1622X22 1822X22 20

No.Dim.In.

14X1418X1820X2022X1022X22

No.Body

Dim. In.CollarDia. In.

18 x 18 618 x 18 822 x 10 622 x 10 822 x 10 1022 x 22 622 x 22 822 x 22 1022 x 22 1222 x 22 1422 x 22 1622 x 22 18

INTEGRITY.It’s in everything we do.

NeckSz. In.

No. Square Round6 56 68 68 89 79 810 810 1012 612 812 1012 1215 1215 1418 1218 1418 1622 622 822 1022 1222 1422 1622 1822 22

20

Dampers & Controls

Unit # 3671001

Round – Model WMVCD – TypicalDampers & ControlsFor use in low andmedium velocity non-corrosive air sys-tems. Features 20-ga.galvanized steelframe with pressed-inneoprene bearings;20-ga. galvanizedsteel blade mountedto 3/8” square axle;quadrant locking han-dle on 2” standoff.Measures 9” L. Millfinish.

Unit # 9999004

Unit # 3715001

For use with worm gear regulators and Bowdencable controls.

Unit # 3715006

Round – Model YR-4010For zone con-trol, make-upair, intake andexhaust applica-tions. 2-posi-tion, 90-degreebutterfly design.Features heavy-duty spiral shell,24V motor withside-mounted

control box, 20-ga. V-style damper blade withposition indicator and steel shafts.

Unit # 3715002

Bowden – Series 270-275

For positive locking control of dampers in inac-cessible locations without access doors. Fea-tures steel rack and pinion with flexible casingand stainless steel wire. Can be installed on dif-fuser frame, inside plenum or on face of floorgrille. Includes mounting hardware for mostdampers.

Unit # 3715005

Bowden

Runs between damper and remote controller.Features .054” stainless steel torsion-straight-ened wire with 3/16” flexible galvanized coilspring casing.


For positive locking control of dampers in inac-cessible locations without access doors. Fea-tures steel rack and pinion with flexible casingand stainless steel wire. Controller with C-bracket fastens to ceiling or stud. Includes zinc-plated threaded cap, 7/8” diameter.

Unit # 3715003


For positive locking control of dampers in inac-cessible locations without access doors. Fea-tures steel rack and pinion with flexible casingand stainless steel wire. For installation at ceil-ing line. Includes 3” zinc-plated cover andmounting hardware for most dampers.Series 270-301. Controller mounts atop con-cealed ceiling cup; unit is flush with finished sur-face. Cup measures 2-5/8” dia. x 15/16” D.Series 270-301EZ. Controller and mountingbracket fasten to ceiling stud.

No.Dia.In.68

101214

No.Lgth.

In.12

No.Dia.In.

Lgth.In.

6 128 1210 1212 1214 1416 16

No.HubSize Desc.

Large 3/8” Sq. to 1/2” Round

Small 1/4” Sq. to 5/16” Round

No.Lgth.

Ft.561050

No.HubSize Desc.Large 3/8” Sq. to 1/2” Round


No.HubSize Desc.

Large 3/8” Sq. to 1/2” Round


Series 270-301

Series 270-301-EZ

Visit our Website atwww.tombarrow.com!

Tampa

21

Fire Dampers

nit # 3715004Unit # 3703008

Curtain Type – Vertical – Model IBD20

Fire DampersFor use in static systems. Features 20-ga. gal-vanized steel frame and 24-ga. galvanized steelblades. Integral roll-formed sleeve and retainingangles facilitate installation. Sleeve length 12”.UL classified 1-1/2 hour fire protection rating.

Style A – Rectangular

Unit # 3703009

Curtain Type – Vertical/Horizontal – Model IBD20

For use in static systems that shut down duringfire. Can be installed vertically in wall or hori-zontally in concrete floor. Features 12” 20-ga.galvanized steel sleeve, 24-ga. galvanized steelblades, picture frame mounting angles (2 sides)and 165°F fusible link. UL and CUL classified.FM approved.

Unit # 3703010

Curtain Type – Vertical/Horizontal – Model IBD20

For use in static systems that shut down duringfire. Can be installed vertically in wall or hori-zontally in concrete floor. Features 12” 20-ga.galvanized steel sleeve, 24-ga. galvanized steelblades, picture frame mounting angles (2 sides)and 165°F fusible link. Non-sealed transition forlow pressure, 100% free area applications. ULand CUL classified. FM approved.Style R. Does not allow 100% free area.

Fire Dampers, Louvers & Vents

No.Dim.In.

12 x 812 x 1216 x 1024 x 1236 x 1236 x 18

Style A

Style R

TOM BARROW CO.Your Single Source

Solution!

No.Dim.In.

8 x 810 x 810 x 1012 x 812 x 1012 x 1214 x 1014 x 1214 x 1416 x 1016 x 1216 x 1618 x 1218 x 1820 x 1220 x 2024 x 824 x 1224 x 24

6 x 68 x 68 x 810 x 810 x 1012 x 812 x 1012 x 1214 x 814 x 1014 x 1214 x 1416 x 1016 x 1216 x 1618 x 12

Style A Style B

18 x 1418 x 1820 x 1220 x 2024 x 1224 x 1824 x 2436 x 1236 x 18

No.Dia.In.

681012141618

68101214

No.Dim.In.

Style LR

Style R

22

Fire Dampers, Louvers & Vents

Unit # 3703004

Ceiling – Models CFD & CFDR

Protects against flame and heat in HVAC ceiling penetrations. Features20-ga. galvanized steel frame and blades with mill finish. Blades hinge incenter and are held open with fusible link. UL classified 3-hour fire pro-tection rating.

Rectangular

Round

Unit # 3703011

Unit # 3703006

Stationary – Drainable – Model GFL800D

Features front flange; extruded aluminum 4” deep frame and non-adjust-able 45° blades on 5” centers; 5/8” x .040” aluminum birdscreen onremovable frame. Mill finish. Max. airflow 748 FPM; max. wind load 20lbs./sq. ft.

Unit # 3706001

Aluminum

Extruded aluminum construction with .125” minimum thickness. Features1” deep overlapping blades set at 45°, continuous bottom weepage andclear anodized finish.Style EX. For commercial and industrial applications. Features stormstop at rear of blades and water stop at rear of vent. Style FL. For bathroom exhaust and flood vent applications. Flange cov-ers rough opening edges when installed in existing walls, providing attrac-tive appearance.

No.Dim.In.

6 x 68 x 89 x 9

10 x 1012 x 1215 x 1520 x 2022 x 1022 x 2224 x 1224 x 24

No.Dia.In.68

10121416

.cseD.oNCeramic radiation blanket,

24” x 24”Ext. shaft for manual damper, 1/2” roundExt. shaft for manual damper, 3/8” square

Spring kit for horizontal fire dampers up to 24”

Rectangular

RoundNo.

Dim.In.

12 x 1216 x 1618 x 1218 x 1824 x 1824 x 2436 x 3648 x 48

elytS.oNOpeningDim. In.

EX 15-5/8 x 7-3/44/3-7 x 8/1-8XE4/3-7 x 8/1-8LF

Style EX Style FL

Tampa

23

Fuse Links & Access Doors

Large. For IBD curtain-type fire dampers (except IBDT models).Small. For CFD ceiling fire dampers and all pneumatic fuse links.

Unit # 3703001

Removable – Model ADC24

For use with steel ductwork. Manual locks provide secure closure. Fea-tures 22-ga. steel frame; cammed, removable double-skin door; foamgasket seal and 1” thick fiberglass insulation.

Unit # 3703002

Hinged – Model ADH24

Fuse Links & Access DoorsFor use with steel ductwork. Manual locks provide secure closure. Fea-tures 22-ga. steel frame; double-skin door with continuous piano hinge;foam gasket seal and 1” thick fiberglass insulation.

Unit # 1009017

Flush – Universal – Model UF5000

For installation in drywall, plaster, masonry or tile ceilings and walls. Fea-tures rounded safety corners, one-piece trim flange and continuous con-cealed hinge. 1-1/4'' deep mounting frame with screwdriver-operated camlatch. Gray baked enamel finish.

.cseD.oNSz.In.

165°F 3212°F 3

165°F 1.5212°F 1.5

No.Dim.In.

No.Locks

26 x 628 x 8201 x 01221 x 21201 x 41241 x 41261 x 61421 x 81481 x 81402 x 02442 x 42

Large Small

No.Dim.In.

No.Locks

16 x 618 x 8

10 x 10 112 x 12 114 x 14 116 x 16 118 x 18 220 x 20 224 x 24 2

No.

Dim. In.No.

LatchesDoorCeiling/Wall

Open.8 x 8 8-3/8 x 8-3/8 1

12 x 12 12-3/8 x 12-3/8 116 x 16 16-3/8 x 16-3/8 218 x 18 18-3/8 x 18-3/8 224 x 24 24-3/8 x 24-3/8 424 x 36 24-3/8 x 36-3/8 5

24

Access DoorsUnit # 3704002

General Purpose – Model WBGP

Features 18-ga. steel frame, 14-ga. steel door, concealed piano-typehinge and flush cam latches. 170° opening angle. Gray enamel finish.

Access Doors

Unit # 3707002

Model TM

Provides service access to plumbing, heating, air conditioning and electri-cal systems. For use in masonry, tile or wood walls. Features 14-ga. steeldoor, 16-ga. steel frame with 1'' flange, concealed hinges and screw-driver-operated cam locks.

Unit # 3703003

Models ADR1 & ADR2For use on round duct. Features galvanizedsteel construction with mill finish, syntheticknobs with threaded metal inserts, andsponge gasket. Max. pressure 20” w.g.

Unit # 3349001

Rectangular – “The Sandwich”Airtight pressure vessel design. Fea-tures galvanized steel outer door, high-density fiberglass insulation and galva-nized steel inner door with flat insidecover and closed-cell neoprene gasket.Plastic hand knobs feature metalinserts and zinc coated springs. Testedto pressures of +20” and -10” WG.Includes self-adhesive template forinstallation.

Unit # 3349004

Features galvanized steel outer doorwith permanently bonded ceramic fibergasket, galvanized steel inner door withsmooth inside cover, and 16-ga. blackiron backing plate. Zinc coated wing-nuts with concial springs for openingand closing. Gasket rated to 2300°F;meets NFPA 96 standards. Includesself-adhesive template for installation.

Dim. In.rooDgninepO.oN

12-1/4 x 12-1/4 12 x 1218-1/4 x 18-1/4 18 x 1824-1/4 x 24-1/4 24 x 24

No.Dim. In. No.

Door Wall Open. Latches12 x 12 12-3/8 x 12-3/8 116 x 16 16-3/8 x 16-3/8 118 x 18 18-3/8 x 18-3/8 124 x 24 24-3/8 x 24-3/8 4

No.Dim.In. Ga.

For DuctDia. In.

10 x 6 22 610 x 6 22 810 x 6 22 1010 x 6 22 1210 x 6 22 1410 x 6 22 1610 x 6 22 1810 x 6 22 20

16 x 12 20 1616 x 12 20 1816 x 12 20 2016 x 12 20 2216 x 12 20 24

No.Dim. In.

L x H10 x 612 x 8

18 x 1424 x 18

No.Dim. In.

L x H10 x 612 x 818 x 14

Tampa

25

Access DoorsUnit # 3349003

Ultimate

Sandwich design reduces installation time, eliminates need for weldingand minimizes duct penetration. Grease-tight. Black iron construction. ULand CUL listed. Meets NFPA 96 standards.

Unit # 3707001

Fire-Rated – Model FD

Provides access to utilities in walls or ceilings of stairwells, shafts and cor-ridors. Features 20-ga. steel door with automatic close/latch mechanismand 2'' insulation; 16 ga. steel frame with masonry anchors and bolt holes.Gray enamel finish. UL and WHI listed.

Unit # 3704001

Fire-Rated – Model WBFR

For vertical wall applications. Features 16-ga. steel frame, 18-ga. steeldoor, 1-7/8” mineral wool insulation, concealed pivot-type hinge, auto-matic closer and inside release. 140° opening angle. Self-latching. Grayenamel finish. UL and Warnock Hersey listed.

Dim. In.L x H

rooDgninepO.oN6 x 6 8 x 810 x 6 12 x 812 x 8 14 x 10

No.

Dim. In.

DoorWall

Open.CeilingOpen.

12 x 12 12-3/8 x 12-3/8 13-5/8 x 13-5/818 x 18 18-3/8 x 18-3/8 19-5/8 x 19-5/824 x 24 24-3/8 x 24-3/8 25-5/8 x 25-5/8

Dim. In.rooDgninepO.oN

12-1/4 x 12-1/4 12 x 1218-1/4 x 18-1/4 18 x 1824-1/4 x 24-1/4 24 x 24

We carry products from the world’s largest and

best manufacturers.

Centralize your purchases with us!

26

Spiral Duct, Elbows & Reducers

Unit # 3883001

Gasketed – Eastern Tight™

Triple-lipped EPDM rubber gasket provides air-tight seal and reduces installation time by elimi-nating need for joint sealing. Galvanized steelconstruction with single-wall design. -20°F to+212°F temperature rating. 10-ft. length. MeetsASTM A653 and A924 specifications.

Spiral Duct, Elbows & Reducers

Unit # 3883004

90° – Gasketed – Eastern Tight™Triple-lipped EPDMrubber gasket pro-vides airtight sealand reduces instal-lation time by elimi-nating need for jointsealing. Galvanizedsteel constructionwith single-walldesign. -20°F to+212°F tempera-ture rating. MeetsASTM A653 andA924 specifications.

Unit # 3883005

90° – Gasketed – Eastern Tight™

Single-wall, 5-piece design. Triple-lipped EPDMrubber gasket provides airtight seal andreduces installation time by eliminating need forjoint sealing. Galvanized steel construction.-20°F to +212°F temperature rating. MeetsASTM A653 and A924 specifications.

Unit # 3883007


Single-wall, 3-piece design. Triple-lipped EPDMrubber gasket provides airtight seal andreduces installation time by eliminating need forjoint sealing. Galvanized steel construction.-20°F to +212°F temperature rating. MeetsASTM A653 and A924 specifications.

Unit # 3883006


Triple-lipped EPDM rubber gasket provides air-tight seal and reduces installation time by elimi-nating need for joint sealing. Galvanized steelconstruction with single-wall design. -20°F to+212°F temperature rating. Meets ASTM A653and A924 specifications.

Unit # 3883012



No.Dia.In. Ga.6 288 2610 2612 2614 2616 2418 2420 2422 2424 24

No.Dia.In.68

1012

No.Dia.In.141618202224

No.Dia.In.141618202224

No.Dia.In.681012

Dia. In. Lgth.No. D1 D2 In.

8 6 3-5/810 6 5-3/810 8 3-5/812 8 5-3/812 10 3-5/8

Quality ProductsQuality People

T

27

Reducers, Tees & Taps

Unit # 3883014



Unit # 3883009


Assembled tee with saddle tap. Triple-lippedEPDM rubber gasket provides airtight seal andreduces installation time by eliminating need forjoint sealing. Galvanized steel construction withsingle-wall design. -20°F to +212°F temperaturerating. Meets ASTM A653 and A924 specifica-tions

Unit # 3883008

Field Installed – Gasketed Eastern Tight™


Unit # 3883010

Field Installed – GasketedEastern Tight™

Triple-lipped EPDMrubber gasket pro-vides airtight seal andreduces installationtime by eliminatingneed for joint sealing.Galvanized steel con-struction with single-wall design. -20°F to+212°F temperaturerating. 7” height. MeetsASTM A653 and A924specifications.

Reducers, Tees & Taps

Unit # 3883011


Assembled tee with conical tap. Triple-lippedEPDM rubber gasket provides airtight seal andreduces installation time by eliminating need forjoint sealing. Galvanized steel construction withsingle-wall design. -20°F to +212°F temperaturerating. Meets ASTM A653 and A924 specifica-tions.

Dia. In. Lgth.

No. D1 D2 In.

14 8 1014 10 814 12 816 10 1016 12 816 14 818 12 1018 14 818 16 820 14 1020 16 820 18 822 20 824 18 1024 20 824 22 8

Dia. In. Rad. BodyNo. Inlet Outlet In. Lgth. In.

6 6 .787 168 8 .787 18

10 10 1.00 2012 12 1.00 22

No.Rad.In.

For DuctDia. In.

.7876

.7878

.78710

.78712

.78714

.78716

.78714

.78716

.7878

.78710

.78712

.787201.00241.00101.00121.00141.00161.00181.00221.00121.00141.00161.00201.0024


No.For DuctDia. In.

1416221624141618241618202224182224

Dia. In. BodyNo. Inlet Outlet Lgth. In.

14 14 2016 16 2218 18 24

InletDia. In.

66666688888881010101010101212121212

InletDia. In.

1414141616181818182020202020222224

28

Couplings, Takeoffs, Caps & Hangers

Unit # 3883002

Male – Gasketed – Eastern Tight™Triple-lipped EPDM rubber gasketprovides airtight seal and reducesinstallation time by eliminatingneed for joint sealing. Galvanizedsteel construction with single-walldesign. -20°F to +212°F tempera-ture rating. Meets ASTM A653 andA924 specifications.

Unit # 3883003

Non-Female – Gasketed – Eastern Tight™

Unit # 3883016


For installation on rectangular duct, plenum orother flat surface. Triple-lipped EPDM rubbergasket provides airtight seal and reduces instal-lation time by eliminating need for joint sealing.Galvanized steel construction with single-walldesign. -20°F to +212°F temperature rating.Meets ASTM A653 and A924 specifications.

Unit # 3883017


For installation on rectangular duct, plenum orother flat surface. Triple-lipped EPDM rubbergasket provides airtight seal and reduces instal-lation time by eliminating need for joint sealing.Galvanized steel construction with single-walldesign and 1/2” flange. 7” body height. -20°F to+212°F temperature rating. Meets ASTM A653and A924 specifications.

Unit # 3883020


Triple-lipped EPDM rubber gasket provides air-tight seal and reduces installation time by elimi-nating need for joint sealing. Galvanized steelconstruction with single-wall design and 1/2”flange. -20°F to +212°F temperature rating.Meets ASTM A653 and A924 specifications.

Unit # 3883019


Triple-lipped EPDM rubber gasket provides air-tight seal and reduces installation time by elimi-nating need for joint sealing. Galvanized steelconstruction with single-wall design and 1/2”flange. -20°F to +212°F temperature rating.Meets ASTM A653 and A924 specifications.

Unit # 3688001

Couplings, T

No.Dia. In.681012141618202224

No.Dia.In.681012141618202224

No.Inlet

Dia. In.Rad.In.

6 .7878 1.0010 1.0012 1.00

No.Dia.In.141618202224

No.Dia. In.1416182022

681012

CTOT

CTOT-16CTOT-14

CTOT-18CTOT-20CTOT-22CTOT-24

Hang-Fast

Provides lighter, easier and faster alternative tothreaded rod for hanging mechanical, electricaland HVAC equipment. Ready to use; requiresno additional preparation time. Includes cablewith loop or stud end fixing; grip secures freeend of cable and allows height adjustment ofhanging object.Loop. For wrap-around anchoring on bar joistsor other roof structures.Stud. For anchoring into concrete or metal.Includes 1/4” drop-in expansion anchor.

Hangers

Accessories

T

akeo

No.Cable

Lgth. Ft.End

Fixing

5 Loop10 Loop15 Loop15 Stud30 Loop

5 Loop10 Loop15 Loop30 Loop

No. DescriptionCorner saddle for

rectangular ductworkCable & wire rope cutter

akeof

Loop Stud Grip

fs, Caps & Hangers CADDY SPEED LINK (Atlanta Only)

No. Description Box Qty. SLK2L2LP 2mm Wire, 5.6' Length 10 pcSLK2L3LP 2mm Wire, 3.9' Length 10 pcSLK2L5LP 2mm Wire, 16.4' Length 10 pcSLK2L10LP 2mm Wire, 32.8' Length 5 pc

SLK3L3LP 3mm Wire X 9.9' Long 10 pc10 pcSLK3L5LP 3mm Wire X 16.4' Long

SLK3L10LP 3mm Wire X 32.8' Long 5 pc

Caddy Speed Link SLK with loop

Keyless Caddy Speed Link Wire System w/loop

Tampa

29

Ceiling Exhaust Fans & Transitions

unit # 3679007

Gemini™ Series GC 120–900Direct drive centrifugal design. Can be ceiling, wall or inline mounted. Features steel fan housing and wheels. Opendrip-proof motor mounted on vibration isolators. Includes wiring box and disconnect receptacle, adjustableprepunched mounting brackets and white steel grille. AMCA certified; UL and CUL listed.Ceiling Exhaust Fans & Transitions Ceiling Fans

Accessories

No.CFM .25” Speed

ControllerDischarge

Type WattsDim. In.

L x W x HLow High

No. Desc. No. Desc.Internal Housing for GC-200 Internal Housing for GC-800Internal Housing for GC-300 Internal Housing for GC-900Internal Housing for GC400 Motor only for GC-400Internal Housing for GC-500 Cover plate for GC-100 SeriesInternal Housing for GC-600 Replacement grille for GC-120Internal Housing for GC-700

No. For Gemini Fan Model(s)

4 1/4" X 3 1/2" TO 6" RND GC-120, 140, 160, 18012 5/8" X 10" TO 8" RND GC-20012 5/8" X 11" TO 10" RND GC-30012 5/8" X 11" TO 8" RND GC-300

17 1/4" X 12 1/8" TO 8" RND GC-400, 500, 600, 70017 1/4" X 12 1/8" TO 10" RND GC-400, 500, 600, 700

27 1/4" X GC-80017 1/-" X 12 1/8" TO 8" RND GC-900

8 1/4" X 6 1/4" TO 8" RND GC-200, 300, 400, 5008 1/4" X 6 1/4" TO 10" RND GC-200, 300, 400, 50010 3/4" X 5" TO 10" RND GC-600, 70010 3/4" X 5" TO 8" RND GC-600, 700

20 1/4" X 6 1/4" TO 12" RND GC-80024 1/4" X 6 1/4" TO 14" RND GC-900

GC-800 & GC-900

GC-200 to GC-700

GC-120 to GC-180

GC-120 32 63 FSC-1 6" Round 29 14 x 12-3/4 X 6-11/16GC-140 90 132 FSC-1 6" Round 47 14 x 12-3/4 X 6-11/16GC-160 145 162 FSC-1 6" Round 57 14 x 12-3/4 X 6-11/16GC-180 218 244 FSC-1 6" Round 113 14 x 12-3/4 X 6-11/16GC-200 81 108 FSC-1 8"x6" 27 12-3/8 X 9-3/4 X 9-3/4GC300 165 224 FSC-1 8"x6" 82 12-3/8 X 10-3/4 X 10-3/4GC400 282 295 FSC-1 8"x6" 109 17 X 11-7/8 X 11-7/8GC500 201 361 FSC-1 8"x6" 135 17 X 11-7/8 X 11-7/8GC600 461 548 FSC-1 10-1/2" X 4-3/4" 197 17 X 11-7/8 X 11-7/8GC700 653 775 FSC-1 10-1/2" X 4-3/4" 366 17 X 11-7/8 X 11-7/8GC800 904 1266 FSC-1 20" X 6" 423 27 X 14-11/16 X 14-11/16GC900 1356 1588 FSC-2 24-1/4" X 6" 504 31 X 14-11/16 X 14-11/16

30

Exhaust Ventilators

Roof Mounted – Direct Drive – Model ACEDDownblast centrifugal design with aluminum base. Includes two-piece top cap with heavy-duty motor and castiron drives. Motor, bearings and drives enclosed in weathertight compartment separated from air stream. Oil- andheat-resistant belts. Built-in lifting lugs. 115V, 60Hz, 1 phase. Includes disconnect and backdraft damper. AMCAcertified; UL and CUL listed.

*(HR) Denotes fans available with Florida/Miami Dade High Wind/Hurricane Ratings.

unit # 3679001

Roof Mounted – Belt Drive – Model ACEBDownblast centrifugal design with aluminum base. Includes two-piece top cap with heavy-duty motor and cast irondrives. Motor, bearings and drives enclosed in weathertight compartment separated from air stream. Oil- and heat-resistant belts. Built-in lifting lugs. 115V, 60Hz, 1 phase. Includes disconnect and backdraft damper. AMCA certified;UL and CUL listed.

*Note: CFM may be raised or lowered 10% by adjusting motor sheave.*(HR) Denotes fans available with Florida/Miami Dade High Wind/Hurricane Ratings.Exhaust Ventilators

unit # 3679010

Upblast – Belt DriveRoof mounted centrifugal design. Includes two-piece top cap with quick release latches. Motor, bearings and drivesmounted on steel power assembly with solid vibration isolators and enclosed in weather-tight compartment. 1” heatshield protects motor and drive components. Aluminum wheels, heavy-duty motor, cast iron bearings, oil- and heat-resistant belts. Includes built-in lifting lugs. AMCA certified; UL and CUL listed.

Exhaust Ventilators

Accessories

No. CFM .25”Roof

Open. In.Dim. In. W x H

MotorRPM

CurbSize In.

249 13-1/2 X 13-1/2 13-5/8 X 13-13/16 1650 16-1/2 X 16-1/2215 13-1/2 X 13-1/2 18-3/4 X 16-13/16 1075 16-1/2 X 16-1/2640 13-1/2 X 13-1/2 18-3/4 X 16-13/16 1550 16-1/2 X 16-1/2344 13-1/2 X 13-1/2 18-3/4 X 16-13/16 1075 16-1/2 X 16-1/2755 13-1/2 X 13-1/2 18-3/4 X 16-13/16 1550 16-1/2 X 16-1/2950 15-1/2 X 15-1/2 28-7/16 X 26-9/16 1075 18-1/2 X 18-1/2

1415 15-1/2 X 15-1/2 28-7/16 X 26-9/16 1075 18-1/2 X 18-1/22004 19-1/2 X 19-1/2 32-7/8 X 28-11/16 1075 22-1/2 X 22-1/2

No. *CFM .25Roof

Open. In.Dim. In. W x H HP

CurbSize In.

400 13-1/2 X 13-1/2 23-9/16 X 21-1/8 1/4 16-1/2 X 16-1/2700 13-1/2 X 13-1/2 23-9/16 X 21-1/8 1/4 16-1/2 X 16-1/21200 15-1/2 X 15-1/2 28-7/16 X 26-7/8 1/4 18-1/2 X 18-1/21600 15-1/2 X 15-1/2 28-7/16 X 26-7/8 1/4 18-1/2 X 18-1/22200 19-1/2 X 19-1/2 32-7/8 X 28-7/8 1/2 22-1/2 X 22-1/23000 19-1/2 X 19-1/2 32-7/8 X 28-7/8 1/2 22-1/2 X 22-1/23200 25-1/2 X 25-1/2 37-11/16 X 35 3/4 28-1/2 X 28-1/2

No. HPCFM

@ .75” SP VoltsRoof

Open. In.Dim. In. W x H

CurbSize In.

1/2 1975 115 15-1/2 x 15-1/2 30-3/16 x 28-5/8 18-1/2 x 18-1/2 x 233/4 2975 115 19-1/2 x 19-1/2 34-11/16 x 30-3/4 22-1/2 x 22-1/2 x 21

.cseD.oNDim.In.

Grease capture and containment system 4-13/16 x 6-3/4

Tampa

31

Dampers, Isolators & Wall Caps

unit # 3679003

Features .020'' aluminum blades, .060'' alumi-num frame, aluminum hinge pins and nylonbushings. Height 1-7/8'' closed, 5-3/16'' open.Maximum operating temperature 200°F.No. BD-12. For use with ACEB & ACED 60–100 Series ventilators.No. BD-14. For use with ACEB & ACED 120 &135 Series ventilators.No. BD-24. For use with ACEB & ACED 180,195, 210, 225 & 245 Series ventilators.

Dampers, Isolators & Wall Capsunit # 3679004

Ceiling

Curtain style design. Functions as heat barrierin air handling penetrations. Fire resistant. ULand CUL classified.

unit # 3679005

2-CSF 1-CSF

Designed for energy conservation and lowersound levels when full operating capacity ofdirect drive fan is not required. 115V, 1 phase.

nit # 3679008

Hanging – Gemini™

For use with Gemini ceiling and inline units 122through 740. Features standard Gemini mount-ing brackets, thermoplastic bushings andflanged nuts.

unit # 3679015

Shear

Operates both fan and room light. Fan powerson 15 seconds after light is turned on. Powersoff 1 to 10 minutes after light is turned off.(Adjustable) Input: 120 VAC+ 10% 50/60 Hz,3.5 watts max. Light: 3A resistive @ 120 VAC500 watts max. Fan: 10A resistive, 1/3 HP @120 VAC.

# 3679011

Roof Mounted

Spun aluminum construction with continuouslywelded curb cap corners on base to preventleaks. Includes 1/2'' mesh birdscreen mountedacross air opening.

it # 3679012

Includes 1/2'' mesh birdscreen.Series WCA. Aluminum.Series WCG. Galvanized steel.

unit # 3679013

Aluminum construction with damper. For usewith round duct.

No.Dim. In.W x L

11-3/4 x 11-3/413-3/4 x 13-3/4

Dim. In.No. A B C D

14-1/2 12-3/8 6-3/16 4-3/16

spmA.oN510

No.Rated Load

Lbs.160

No.Rated Load

Lbs. Qty.75 4

No. Desc.Time Delay Switch

No.Dia.In.

CFM @ 500 FPMFace Vel.

Roof Open. In.

18-1/4 690 13-1/2 x 13-1/228-1/4 1020 15-1/2 x 15-1/228-1/4 1540 23-1/2 x 23-1/2

No.Dim. In.

A B C D

10-5/16 7-3/16 6-3/16 8-5/1610-5/16 7-3/16 6-3/16 8-5/16

12-13/16 6 5 10-13/1612-13/16 6 5 10-13/16

22-5/16 7-3/16 6-3/16 20-5/16

No.Dia.In.

Dim. In.L x W

6 12-3/4 x 8

8 14-1/4 x 1010 15 x 12

32

Roof Caps, Wall Caps & Transitions

nit # 2568001

Sloped

Features built-in birdscreen and backdraft damper. 24 ga. steel construc-tion with baked enamel finish. Black.No. BROAN634. For 3-1/4” x 10” or up to 8” round duct.No. BROAN636. For 3” or 4” round duct.

Roof Caps, Wall Caps & Transitions

Unit # 2568002

30-ga. galvanized steel construction. Converts 3-1/4” x 10” to 6” roundduct.

Unit # 2568006

.025” aluminum construction with natural finish. Features built-in bird-screen.

Unit # 2568011

No. BROAN613. High capacity with built-in backdraft damper and bird-screen. .025” aluminum construction with natural finish.No. BROAN639. Spring-loaded backdraft damper with built-in birdscreen.24-ga. steel construction with black enamel finish.No. BROAN642. Built-in damper. Includes 4” to 3” transition. .025” alumi-num construction with natural finish. No. BROAN643. Built-in backdraft damper. .025” aluminum constructionwith natural finish.

No.Dim. In.

L x W x H18-3/4 x 14-1/4 x 6-5/8

11 x 10-1/4 x 4-3/8

No.Ht.In.9

We carry products from the world’s largest and

best manufacturers.

Centralize your purchases with us!

No.Max. Duct

Dia. In.Dim. In.

L x W x H

8 15 x 15 x 9-7/812 20 x 20 x 14-1/2

8 15-1/4 x 15-1/4 x 11-3/412 17-1/2 x 17-1/2 x 16-3/8

No. FitsDim. In.

H x W x D12” round duct 14-1/2 x 15 x 8-1/2

3-1/4” x 10” duct 5-5/8 x 12-3/4 x 4-7/83” or 4” round duct –

8” round duct 13 x 12-1/2 x 6

BROAN611 BROAN612

BROAN611CM BROAN612CM

BROAN613 BROAN639

BROAN642 BROAN643

Tampa

33

Bath & HVAC Starters

Unit # 3724001

Designed for ease of integration with automated systems. Advanced control inputs eliminate interposing relays.SMART START for superior motor protection. UL Type 1. Combination version include disconnect..

Three Phase HPSCIC KAIC NEMA

No. 200V 230V 400V 600V @ 460V SIZE

2 3 5 7 1/2 5 005 7.5 10 15 5 0

7.5 10 20 25 5 1

2 2 5 5 65 003 5 10 15 30 0

7.5 10 20 25 30 1

No.Single Phase HP

V032V021

11

Unit # 2568003

Premium Series

Centrifugal blower, 4-pole motor produce high exhaust capacity with lowsound. White polymer grille with torsion spring mounting. UL Listed.

Bath & HVAC Starters

Unit # 2568004

Deluxe Series

Compact housing installs between ceiling joists or wall studs. Steelmounting flanges with keyhole slots. Metal grille is torsion-springmounted, attaches without tools. UL Listed.

Unit # 2568005

Economy Series

Compact housing installs between ceiling joists or wall studs. Metalgrille is torsion-spring mounted, attaches without tools. UL Listed.

No. CFM SonesGrille Dim. In.

L x W x H110 4.0 11-1/8 x 10-5/8 x 1-1/2

We welcome the opportunity to quote on

any special tools or equipment which you

may require.


L x W x H70 3.0 9-1/4 x 9 x 3/8


L x W x H50 2.0 9-1/4 x 9 x 3/8

34

Roof Curbs, Supports & Heat Pumps

Unit # 1005001

Taskmaster 5100 SeriesCan be mounted for horizontal or vertical appli-cations. Draw-through design circulates air effi-ciently and evenly across elements. Fieldconvertible; combination 208/240V and single/3-phase heaters up to 10kW. Fan override purgesheater of residual heat after shutdown. Two-stage operation and two-speed motors on 25-50kW models.

Optional AccessoriesNo. KW MBH Volts Phases Mounting Bracket Disconnect Thermostat Kit

3.3/2.5 11.2/8.5 240/208 1 UH-A5105 UH-DCS202 UH-T51003.3 11.2 480 3 UH-A5105 UH-DCS403 UH-T51003.3 11.2 277 1 UH-A5105 UH-DCS202 UH-T51003.3 11.2 208 3 UH-A5105 UH-DCS403 UH-T5100

5.0/3.7 17.1/12.8 240/208 1 UH-A5105 UH-DCS403 UH-T51005.0 17.1 480 3 UH-A5105 UH-DCS403 UH-T51005.0 17.1 208 1 & 3 UH-A5105 UH-DCS403 UH-T51007.5 25.6 480 3 UH-A5120 UH-DCS403 UH-T51007.5 25.6 208 3 UH-A5120 UH-DCS403 UH-T5100

10.0 34.1 480 3 UH-A5120 UH-DCS403 UH-T510010.0 34.1 277 1 UH-A5120 UH-DCS403 UH-T51009.9 33.8 208 1 & 3 UH-A5120 UH-DCS403 UH-T5100

15.0 51.2 480 3 UH-A5120 UH-DCS603 UH-T510015.0 51.2 208 3 UH-A5120 UH-DCS603 UH-T5100

Unit # 3681001

InsulatedRoof Curbs, Supports & Heat Pumps

18-ga. galvanized steel construction; weldedone-piece design. Features 2 x 2 pressure-treated wood nailer and 1-1/2” thick fiberglassinsulation.

Unit # 3681002

18-ga. galvanized steel construction; weldedone-piece design. Features full-depth C-channel reinforcement and 6” spreader chan-nels on 12” centers; 2 x 4 pressure-treatedwood nailer. Galvanized counterflashingattached with tek screws and neoprenewashers.

No.Outside Dim. In.

W x L x H12 x 12 x 1215 x 15 x 12

16.5 x 16.5 x 1217 x 17 x 12

18.5 x 18.5 x 1218.5 x 18.5 x 23

19 x 19 x 1222.5 x 22.5 x 1222.5 x 22.5 x 21

23 x 23 x 1226.5 x 26.5 x 12

27 x 27 x 12

28.5 x 28.5 x 1228.5 x 28.5 x 18

29 x 29 x 1234.5 x 34.5 x 1234.5 x 34.5 x 1858.5 x 58.5 x 12

No.Outside Dim. In.

W x L x H

No.Dim.L x H

2’ x 12”3’ x 12”4’ x 12”6’ x 12”

Serving the Southeastwith 10 locations in

Georgia, Florida,Tennessee and Alabama!

Tampa

Counterflashing

2x4 wood nailer

CPES-3

2’ x 18”3’ x 18”4’ x 18”6’ x 18”

35

Wall & Ceiling Heaters & Thermostats

Unit # 1005002

Series 3310

Wall & Ceiling Heaters & ThermostatsConstructed of heavy gauge steel with rough-in dimensions of 19-5/16'' Hx 14-3/16'' W x 4'' D. 600 RPM motor drives vane axial blower to deliver175 CFM downflow air. Features standard thermal overload cutoff andbuilt-in thermostat. Temperature range 55°F to 85°F. Ivory. UL listed.

Wall Heaters

Accessories

Note: Field installed.

Unit # 1005003

Commercial – Series 3320

Constructed of heavy gauge steel with rough-indimensions of 19-5/16'' H x 14-3/16'' W x 4'' D.Grille measure 15-29/32'' W x 20-27/32” H. 600RPM motor drives vane axial blower to deliver175 CFM downflow air. Features standard ther-mal overload cutoff, fan delay switch, automaticreset thermal limit switch and built-in thermo-stat. Temperature range 55°F to 85°F. Ivory. ULand CUL listed.

Wall Heaters

Accessories

Unit # 1005007

Recess-Mounted

Features “bulls-eye” venturi design for uniform air patterns in spaces withup to 12-ft. ceilings. Features enclosed steel fin sheath element, radial dif-fuser, propeller-style fan blades, manual reset thermal limit and 20-ga.grille. Measures 23-1/16” L x 23-1/16” W x 9-1/8” D. White powder coatfinish. Includes factory installed thermostat, transformer and disconnectswitch.

Unit # 1005006

For field installation in unit heater.

Unit # 1005005

Line Voltage

SPDT design for heating or cooling applications. Measures 4.75” H x 2.8”W x 1.5” D. Features built-in bi-metal thermometer. UL and CSA listed.

For use with insulation. Includes shaft extension withlocking screw and damper regulator extension.

Unit # 9999001

No. Watts BTU Volts Amps1500 5120 120 12.5

3000/2250 10,240 240/208 12.5/10.84000/3000 13,648 240/208 16.6/14.4

No. Desc.Surface Mounting Frame

Rough In Box only

No. Watts BTU Volts Amps4000 13,800 208 19.21500 5120 277 4.13000 10,350 277 10.84000 13,800 277 14.4

3000/2250 10,350/7763 240/208 12.5/10.84000/3000 13,800/10,350 240/208 16.7/14.4

No. Desc.4'' Surface Mounting Frame, Field Installed

No. kW BTUVoltsAC

4.0 13,600 277

No.No.

Poles AmpsVoltsAC

2 20 120 to 2773 40 –3 60 120 to 600

Setpoint Temp. Range °F VoltsNo. Cool Heat AC

50 to 90 35 to 75 120 to 277

No.Stand-Off

In.1-1/2

36

Regulators, Flashings & Pipe Supports

Plated steel construction with die-casthandle. Fully assembled with setscrewsand lock washer.

Unit # 3697001

Model 1.5

Regulators, Flashings & Pipe SupportsFor supporting roof-mounted gas pipes, electrical conduit or mechanicalpiping. Polycarbonate resin construction; compensates for thermalexpansion and contraction of pipe, preventing damage to roof.

Unit # 3697002

Model 3R

Roller bearing design for supporting roof-mounted gas pipes, electricalconduit or mechanical piping. Polycarbonate resin construction; compen-sates for thermal expansion and contraction of pipe, preventing damageto roof.

Unit # 3357001

Silicone – Deck Mate®

Flashings & Pipe AccessoriesSuitable for extremely high and low temperature applications; servicetemperature range -100°F to 500°F. Works with any corrugated metalroof. Aluminum flanged base bends to fit irregularities. Forms watertightseal with proper sealant and standard fasteners. Includes clamp.

Unit # 3357002

Alumi-Flash®

Molded black EPDM 8” diameter cap resists weather and sunlight expo-sure. Flashing base measures 14” diameter x 4” H; features Weather-Titepressure seal with 2 beads formed into collar which connect to doublegrooves inside cap. Base must be roofed in. Service temperature -60°F to250°F. Resistant to ozone and ultraviolet.

For Ext. Shaft.nI .zSepyT.oN

8/3erauqS2/1dnuoR

Max. PipeSz. In. Max. Base

No. ID OD Load Lbs. Dim. In.1.5 1-9 80 6 x 6

Max. PipeSz. In. Max. Base

No. ID OD Load Lbs. Dim. In.3 3.75 100 7 x 7

No.Pipe

OD In.OA

Ht. In.Base

Wdth. In.Pkg.Qty.

1/4 to 4 4 8 153 to 6 5 10 104 to 7 5 11 105 to 9 6 12 106 to 11 6 14 107 to 13 6 17 5

No.CapStyle

PipeConfig.

C-126 (1) 2” to 6”C-212 (2) 3/8 ” to 1”; (2) 1” to 2”

AFSMC-126 AFSMC-212

Tampa

37

Pipe Accessories & Hand ToolsUnit # 3357004

Curb Mounted – Pipe Portal®

Leakproof, weathertight pipe router for new construction. Mounts verti-cally or horizontally. ABS plastic roof curb cover with laminated acryliccoating for ozone/UV resistance. Molded sealing rings on collared open-ing mate with grooves in black EPDM rubber cap. Swivel action clamp.Curb cover service temp. -40°F to 160°F; rubber cap -60°F to 270°F.Curb cover measures 8” wide at top, 14” wide at base. 4” height.

Unit # 3357005

Neoprene

Designed for use with Pipe Portal® systems. For single-pipe applicationson synthetic rubber, hot asphalt or cold tar pitch 1-ply roofs. Conicalshape provides secure seal. Black.

Unit # 3357003

Snaplock

For use on roof, wall and floor penetrations. Features stainless steel bandand housing with zinc plated steel bridge.

Unit # 3698001 NELCO

Nylon construction. White. 50 per pkg.

Pipe Accessories & Hand ToolsUnit # 3699002

Manual

For installation of light-heavy and heavy cross-section cable ties in low-volume applications. Features operator-controlled tension and cut-off.Steel construction with travel stop for operator safety. Yellow.

Unit # 3699001

Manual

For installation of light, standard and heavy cross-section cable ties. Pro-vides controlled tension for tighter bundling and flush cut-off for safety.Features tension indicator and selector knob. Metal construction. Graypowder coat finish with green trigger and selector knob.

No.CapStyle

PipeConfig.

CurbSize In.

C-126 (1) 2” to 6” 12 x 12C-212 (2) 3/8 ” to 1”; (2) 1” to 2” 12 x 12

No. SizePipe

Dia. In.Body

Thick. MilsMedium 1 to 6 60

Dia. In. Lgth. ScrewNo. Min. Max. In. Sz. In.

1.75 15 48 .3125

PSSMC-126 PSSMC-212

No.Max.

Dia. In.

3648

36

.cseD.oNCable tie installation tool

.cseD.oNCable tie installation tool

Not all products are available at all branches.

Contact your local branch for availability.

38

Hand Tools & Duct Sealants

Unit # 3331001

Offset

Compound leverage. Capacity 18-ga. coldrolled sheet metal; 22-ga. stainless steel. Ser-rated, alloy steel blades with grade-8 centerpivot bolt and double-overwind spring. Moldedplastic grips. Overall length 9-1/4''. Cut length1-1/4''. Meets ANSI specifications.

Unit # 3331003

Bulldog

Cuts through seams and multiple layers. Forcutting slips and drives, rolled edges and thicksheet materials. Capacity 16-ga. cold rolledsheet metal; 18-ga. stainless steel. Serrated,alloy steel blades with grade-8 center pivot boltand double-overwind spring. Molded plasticgrips.

Unit # 2552002

Duct Sealant

Unit # 2552003

Water-Based – Duct Seal™ 321

For indoor/outdoor use on metal duct, glassfiber duct board, flex duct, duct fabric and flexi-ble tubing runouts. Non-toxic. Contains UVinhibitors. Smooth consistency; thixotropic.Non-sag formulation. Water solvent with syn-thetic latex base. Gray color. Time to testapprox. 48 hours. Service temperature -20°F to200°F. Storage temperature 35°F to 110°F.Shelf life 1 year. VOC (less water) 79 GPL.Shore A hardness >20. Coverage up to 320 lin.ft. at 3” width, 20-mil thickness. Resists weather,mold and mildew. Apply to clean, dry, oil-freesurface. Cleans up wet with soap and water.Non-flammable. Meets ASTM specifications.UL/CUL classified. Warning: Do not use where acidic or alkalinechemicals are present (e.g., lab fume hoods,vents, etc.).

Hand Tools & Duct Sealants

Unit # 2552004

Iron Grip™ 601

Water-based, synthetic resins duct sealant. For-mulated to provide extended coverage andease of application. Apply to outer surface ofduct joint. Gray.

Unit # 2552011

Solvent-Based – Sure Grip™ 404

No-drip, no-string formulation. Heavy brush-onconsistency. Toluene and heptane solvent withsynthetic rubber resin base. Gray color. Time totest 24 hours. Service temperature -20°F to200°F. Storage temperature below 90°F. Shelflife 1 year. VOC (less water) 395 GPL. Viscosity150,000-200,000 cps. Shore A hardness >60.Coverage up to 320 lin. ft. at 3” width, 20-milthickness. Resists water, mold and mildew.Apply to clean, dry, oil-free surface. Cleans upwith solvent. Flammable. Meets ASTM specifi-cations. UL/CUL classified. Warning: Keep away from open flame. Harmfulif swallowed or inhaled. Do not use where acidicor alkaline chemicals are present (e.g., lab fumehoods, vents, etc.).

Unit # 2552005

Elastomeric – Foil Grip™

For indoor/outdoor use on sheet metal, ductboard, flex duct, PVC coated duct and ductwrap vapor barriers. Remains flexible withoutcracking. 2-mil aluminum backing with 15-milGRAY MATTER™ elastomeric modified butyladhesive. Instant high tack; full bond 24 hours.Service temperature -20°F to 200°F.Storage temperature 35°F to 110°F. Shelf life 2years. VOC 0 GPL. Tensile strength 955 PSI.Peel strength 16 lbs./linear inch. Typical elonga-tion 560% (adhesive only). Resists weather,mold and mildew. Apply to clean, dry, oil-freesurface. Cleans up with solvent. Non-flamma-ble. UL/CUL classified. Warning: Do not use where acidic or alkalinechemicals are present (e.g., lab fume hoods,vents, etc.).

No.Cut

TypeLeft

Right

No.Lgth.

In.Cut

Lgth. In.9 7/8

P6510-L P6510-R


No.Width

In.2

No.SizeGal.

1

No.SizeGal.

1

No.SizeGal.

1

No.Width

In.Lgth.

Ft.

2 100

3 100

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Tape, Sealants & FastenersUnit # 2681002

High Tensile

Natural rubber adhesive. 10 mils thick. MeetsUL 723 requirements.

Unit # 2681010

For rigid, preformed aluminum foil-faced ducts.Features dead-soft foil backing with syntheticrubber adhesive. 3.6 mils thick. 50 yds. per roll.Meets UL 723 requirements.

Unit # 2681011

Diamond-Pattern

Tear resistant. Synthetic rubber adhesive. 35mils thick. Aluminum color. Meets UL 723requirements.

Unit # 2681012

Printed

For use on fiberglass duct systems. Dead-softfoil backing with acrylic adhesive. 4.8 mils thick.Meets UL 181 A/B requirements.

Unit # 2552001

3” width.

Unit # 3711001

NuFlex™ 814Tape, Sealants & Fasteners100% silicone intumescent caulk forsealing service penetrations, expan-sion joints and separations in fire-rated floors and walls. Also for sealingaround communication cables, insu-lated and PVC pipe. Expands whenheated above 300°F to seal outsmoke, fire, water and toxic gases.Non-sagging, UV resistant.

Unit # 2716001

Features 1/4'' slotted hex washer head. Zincplated. 1000 per box.

Unit # 2716002

Features 5/16'' hex washer head, #3 point size.Zinc plated. 500 per pkg.

Unit # 2716003

Magnetic

Features 1/4'' hex drive. Torque applied to flats;resists rounding. 50 per box.

Useful Information

No.Width

In.Lgth.Yds

2 60

No.Width

In.23

No.Width

In.Lgth.Yds.

3 50

No.Width

In.Lgth.Yds.

2-1/2 60

No.Lgth.

Ft.150300

No. ColorSize

Fl. Oz.Red 10.1

No. Desc.#7 x 1/2''#10 x 1/2''#10 x 3/4''

No. Desc. TPI#10 x 3/4'' 16

No.SizeIn.1/45/16

No.

40

Useful Information

T

41

Useful Information

42

Useful Information

T

43

Useful Information

44

Glossary of TermsGlossary of TermsABS pipe: Acrylonitrilebutadienestyrene plastic pipe used for water,drains, waste and venting.

Absolute pressure: Gauge pres-sure plus the pressure of the atmo-sphere, normally 14.696 at sealevel at 68°F.

Absolute zero temperature: Thelowest obtainable temperaturewhere molecular motion stops, -460°F (-273°C).

Absorbent (attractant): The saltsolution used to attract water in anabsorption chiller.

Absorption air conditioningchiller: A system using a salt sub-stance, water and heat to providecooling for an air conditioning sys-tem.

Accumulator: A storage tanklocated in the suction line of a com-pressor. It allows small amounts ofliquid refrigerant to boil away beforeentering the compressor. Some-times used to store excess refriger-ant in heat pump systems duringthe winter cycle.

Acid-contaminated system: Arefrigeration system that containsacid due to contamination.

ACR tubing: Air Conditioning andRefrigeration tubing that is veryclean, dry and normally chargedwith dry nitrogen. The tubind issealed at the ends to contain thenitrogen.

Activated alumina: A chemicaldesiccant used in refrigerant driers.

Active solar system: A systemthat uses electrical and/or mechani-cal devices to help collect, storeand distribute the sun’s energy.

Air-acetylene: A mixture of air andacetylene gas that when ignited isused for soldering, brazing andother applications.

Air heat exchanger: A deviceused to exchange heat between airand another medium at differenttemperature levels, such as air-to-air, air-to-water or air-to-refrigerant.

Air conditioner: Equipment thatconditions air by cleaning, cooling,heating, humidifying or dehumidify-ing it. A term often applied to com-fort cooling equipment.

Air conditioning: A process thatmaintains comfort conditions in adefined area.

Air-cooled condenser: One of thefour main components of an air-cooled refrigeration system. Itreceives hot gas from the compres-sor and rejects it to a place where itmakes no difference.

Air gap: The clearance betweenthe rotating rotor and the stationarywinding on an open motor. Knownas a vapor gap in a hermeticallysealed compressor motor.

Air handler: The device thatmoves the air across the heatexchanger in a forced-air system –normally considered to be the fanand its housing.

Air pressure control (switch):Used to detect air pressure dropacross the coil in a heat pump out-door unit due to ice buildup.

Air sensor: A device that registerschanges in air conditions such aspressure, velocity, temperature ormoisture content.

Air, standard: Dry air at 70°F and14.696 PSI at which it has a massdensity of 0.075 lb./cu. ft. and aspecific volume of 13.33 cu. ft./lb,ASHRAE 1986.

Air vent: A fitting used to vent airmanually or automatically from asystem.

Algae: A form of green or black,slimy plant life that grows in watersystems.

Allen head: A recessed hex headin a fastener.

Alternating current: An electriccurrent that reverses its direction atregular intervals.

Altitude adjustment: An adjust-ment to a refrigerator thermostat toaccount for a lower than normalatmospheric pressure such as maybe found at a high altitude.

Ambient temperature: The sur-rounding air temperature.

American standard pipe thread:Standard thread used on pipe toprevent leaks.

Ammeter: A meter used to mea-sure current flow in an electrical cir-cuit.

Amperage: Amount of electron orcurrent flow (the number of elec-trons passing a point in a giventime) in an electrical circuit.

Ampere: Unit of current flow.

Anemometer: An instrument usedto measure the velocity of air.

Angle valve: Valve with one open-ing at a 90° angle from the otheropening.

Anode: A terminal or connectionpoint on a semiconductor.

Approach temperature: The dif-ference in temperature between therefrigerant and the leaving water ina chilled-water system.

ASA: Abbreviation for the Ameri-can Standards Association (nowknown as American National Stan-dards Institute [ANSI]).

ASHRAE: Abbreviation for theAmerican Society of Heating,Refrigeration and Air ConditioningEngineers.

Aspect ratio: The ratio of thelength to width of a component.

Atmospheric pressure: Theweight of the atmosphere’s gasespressing down on the earth. Equalto 14.696 PSI at sea level and 70°F.

Atom: The smallest particle of anelement.

Atomize: Using pressure tochange liquid to small particles ofvapor.

Automatic combination gasvalve: A gas valve for gas fur-naces that incorporates a manualcontrol, gas supply for the lot,adjustment and safety features forthe pilot, pressure regulator, andcontrols for the main gas valve.

Automatic control: Controls thatreact to a change in conditions tocause the condition to stabilize.

Automatic defrost: Using auto-matic means to remove ice from arefrigeration coil.

Automatic expansion valve: Arefrigerant control valve that main-tains a constant pressure in anevaporator.

Back pressure: The pressure onthe low-pressure side of a refrigera-tion system (also known as suctionpressure).

Back seat: The position of a refrig-eration service valve when the stemis turned away from the valve bodyand seated.

Baffle: A plate used to keep fluidsfrom moving back and forth at will ina container.

Balanced port TXV: A valve thatwill meter refrigerant at the samerate when the condenser headpressure is low.

Ball check valve: A valve with aball-shaped internal assembly thatonly allows fluid to flow in one direc-tion.

Barometer: A device used to mea-sure atmospheric pressure that iscommonly calibrated to inches ormillimeters of mercury. There aretwo types: mercury column andaneroid.

Base: A terminal on a semiconduc-tor.

Battery: A device that produceselectricity from the interation of met-als and acid.

Bearing: A device that surrounds arotating shaft and provides a low-friction contact surface to reducewear from the rotating shaft.

Bellows: An accordion-like devicethat expands and contracts wheninternal pressure changes.

Bellows seal: A method of sealinga rotating shaft or valve stem thatallows rotary movement of the shaftor stem without leaking.

Bending spring: A coil spring thatcan be fitted inside or outside apiece of tubing to prevent its wallsfrom collapsing when being formed.

Bimetal: Two dissimilar metals fas-tened together to create a distortionof the assembly with temperaturechanges.

Bimetal strip: Two dissimilar metalstrips fastened back to back.

Bleeding: Allowing pressure tomove from one pressure level toanother very slowly.

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Glossary of TermsBleed valve: A valve with a smallport usually used to bleed pressurefrom a vessel to the atmosphere.

Blocked suction: A method of cyl-inder unloading. The suction linepassage to a cylinder in a recipro-cating compressor is blocked, thuscausing that cylinder to stop pump-ing.

Blowdown: A system in a coolingtower whereby some of the circulat-ing water is bled off and replacedwith fresh water to dilute the sedi-ment in the sump.

Boiler: A container in which a liq-uid may be heated using any heatsource. When the liquid is heatedto the point that vapor forms and isused as the circulating medium, it iscalled a steam boiler.

Boiling point: The temperaturelevel of a liquid at which it begins tochange to a vapor. The boiling tem-perature is controlled by the vaporpressure above the liquid.

Bore: The inside diameter of a cyl-inder.

Bourdon tube: C-shaped tubemanufactured of thin metal andclosed on one end. When pressureis increased inside, it tends tostraighten. It is used in a gauge toindicate pressure.

Brazing: High-temperature (above800°F) soldering of two metals.

Breaker: A heat-activated electri-cal device used to open an electri-cal circuit to protect it fromexcessive current flow.

British thermal unit (BTU): Theamount (quantity) of heat requiredto raise the temperature of 1 lb. ofwater 1°F.

Bulb, sensor: The part of a sealedautomatic control used to sensetemperature.

Burner: A device used to prepareand burn fuel.

Burr: Excess material squeezedinto the end of tubing after a cut hasbeen made. This burr must beremoved.

Butane: A liquefied petroleum gasburned for heat.

Cad cell: A device used to provethe flame in an oil burning furnacecontaining cadmium sulfide.

Calibrate: To adjust instruments orgauges to the correct setting forconditions.

Capacitance: The term used todescribe the electrical storage abil-ity of a capacitor.

Capacity: The rating system ofequipment used to heat or cool sub-stances.

Capillary attraction: The attrac-tion of a liquefied material betweentwo pieces of material such as twopieces of copper or brass. Forinstance, in a joint made up of cop-per tubing and a brass fitting, thesolder filler material has a greaterattraction to the copper and brassthan to itself and is drawn into thespace between them.

Capillary tube: A fixed-boremetering device. This is a smalldiameter tube that can vary inlength from a few inches to severalfeet. The amount of refrigerant flowneeded is predetermined and thelength and diameter of the capillarytube is sized accordingly.

Carbon dioxide: A by-product ofnatural gas combustion that is notharmful.

Carbon monoxide: A poisonous,colorless, odorless, tasteless gasgenerated by incomplete combus-tion.

Catalytic combustor stove: Astove that contains a cell-like struc-ture consisting of a substrate, wash-coat and catalyst producing achemical reaction causing pollut-ants to be burned at much lowertemperatures.

Cathode: A terminal or connectionpoint on a semiconductor.

Cavitation: A vapor formed due toa drop in pressure in a pumpingsystem. Air at a pump inlet may becaused at a cooling tower if thepressure is low and water is turnedto vapor.

Celsius scale: A temperaturescale with 1200 graduationsbetween water freezing (0°C) andwater boiling (100°C).

Centigrade scale: See Celsiusscale.

Centrifugal compressor: A com-pressor used for large refrigerationsystems. It is not positive displace-ment but is similar to a blower.

Centrifugal switch: A switch thatuses a centrifugal action to discon-nect the start windings from the cir-cuit.

Change of state: The conditionthat occurs when a substancechanges from one physical state toanother, such as ice to water orwater to steam.

Charge: The quantity of refrigerantin a system.

Charging cylinder: A device thatallows the technician to accuratelycharge a refrigeration system withrefrigerant.

Check valve: A device that permitsfluid flow in one direction only.

Chill factor: A factor or numberthat is a combination of tempera-ture, humidity and wind velocity thatis used to compare a relative condi-tion to a known condition.

Chilled-water system: An air con-ditioning system that circulatesrefrigerated water to the area to becooled. The refrigerated waterpicks up heat from the area, thuscooling the area.

Chiller purge unit: A system thatremoves air from a low-pressurechiller.

Chimney: A vertical shaft used toconvey flue gases above the roof-top.

Chimney effect: A term used todescribe air or gas when it expandsand rises when heated.

Cholorfluorocarbons (CFC):Those refrigerants thought to con-tribute to the depletion of the ozonelayer.

Circuit: An electron or fluid-flowpath that makes a complete loop.

Circuit breaker: A device thatopens an electric circuit when anoverload occurs.

Clamp-on ammeter: An instru-ment that can be clamped aroundone conductor in an electrical circuitto measure the current.

Clearance volume: The volume atthe top of the stroke in a compres-sor cylinder between the top of thepiston and the valve plate.

Closed circuit: A complete pathfor electrons to flow on.

Closed loop: Piping circuit that iscomplete and not open to the atmo-sphere.

Code: The local, state or nationalrules that govern safe installationand service of systems and equip-ment for the purpose of safety ofthe public and trade professionals.

Coefficient of performance(COP): The ratio of usable outputenergy divided by input energy.

CO2 indicator: An instrumentused to detect the quantity of car-bon dioxide in flue gas for efficiencypurposes.

Cold: The word used to describeheat at lower levels of intensity.

Cold anticipator: A device thatanticipates a need for cooling andstarts the cooling system earlyenough for it to reach capacitywhen it is needed.

Cold junction: The junction oppo-site the hot junction in a thermocou-ple.

Cold trap: A device to help trapmoisture in a refrigeration system.

Cold wall: The term used in com-fort heating to describe a cold out-side wall and its effect on humancomfort.

Collector: A terminal on a semi-conductor.

Combustion: A reaction calledrapid oxidation or burning producedwith the right combination of a fuel,oxygen and heat.

Comfort chart: A chart used tocompare the relative comfort of onetemperature and humidity conditionto another.

Compound gauge: A gauge usedto measure the pressure above andbelow the atmosphere’s standardpressure. It is a Bourdon tubesensing device and can be found onall gauge manifolds used for airconditioning and refrigeration ser-vice work.

Compression: A term used todescribe a vapor when pressure isapplied and the molecules are com-pacted closer together.

46

Glossary of TermsCompression ratio: A term usedwith compressors to describe theactual difference in the low- andhigh-pressure sides of the compres-sion cycle. It is absolute dischargepressure divided by absolute suc-tion pressure.

Compressor: A vapor pump thatpumps vapor (refrigerant or air)from one pressure level to a higherpressure level.

Compressor displacement: Theinternal volume of a compressorused to calculate its pumpingcapacity.

Concentrator: That part of anabsorption chiller where the dilutedsalt solution is boiled to release thewater.

Condensate: The moisture col-lected on an evaporator coil.

Condensate pump: A small pumpused to pump condensate to ahigher level.

Condensation: Liquid formedwhen a vapor condenses.

Condense: Changing a vapor to aliquid at a particular pressure.

Condenser: The component in arefrigeration system that transfersheat from the system by condens-ing refrigerant.

Condenser flooding: A method ofmaintaining a correct head pressureby adding liquid refrigerant to thecondenser from a receiver toincrease the head pressure.

Condensing-gas furnace: A fur-nace with a condensing heatexchanger that condenses moisturefrom the flue gases resulting ingreater efficiency.

Condensing pressure: The pres-sure that corresponds to the con-densing temperature in arefrigeration system.

Condensing temperature: Thetemperature at which a vaporchanges to a liquid.

Condensing unit: A complete unitthat includes the compressor andthe condensing coil.

Conduction: Heat transfer fromone molecule to another within asubstance or from one substance toanother.

Conductivity: The ability of a sub-stance to conduct electricity or heat.

Conductor: A path for electricalenergy to flow on.

Contactor: A larger version of therelay. It can be repaired or rebuiltand has moveable and stationarycontacts.

Contaminant: Any substance in arefrigeration system that is foreignto the system, particularly if itcauses damage.Control: A device to stop, start ormodulate flow of electricity or fluidto maintain a preset condition.

Control system: A network of con-trol to maintain desired conditions ina system or space.

Convection: Heat transfer fromone place to another using a fluid.

Cooler: A walk-in or reach-inrefrigerated box.

Cooling tower: The final device inmany water-cooled systems whichrejects heat from the system intothe atmosphere by evaporation ofwater.

Copper plating: Small amounts ofcopper are removed by electrolysisand deposited on the ferrous metalparts in a compressor.

Corrosion: A chemical action thateats into or wears away a material.

Counter EMF: Voltage generatedor induced above the applied volt-age in a single-phase motor.

Counterflow: Two fluids flowing inopposite directions.

Coupling: A device for joining twofluid-flow lines. Also the deviceconnecting a motor drive shaft tothe driven shaft in a direct-drivesystem.

CPVC (Chlorinated polyvinyl chlo-ride): Plastic pipe similar to PVCexcept that it can be used with tem-peratures up to 180°F at 100 PSIG.

Crankcase heat: Heat provided tothe compressor crankcase.

Crankcase pressure regulator: Avalve installed in the suction line,usually close to the compressor. Itis used to keep a low-temperaturecompressor from overloading on ahot pull down.

Crankshaft seal: Same as thecompressor shaft seal.

Crankshaft throw: The off-centerportion of a crankshaft that changesrotating motion to reciprocatingmotion.

Creosote: A mixture of unburnedorganic material found in the smokefrom a wood-burning fire.

Crisper: A refrigerated compart-ment that maintains a high humidityand low temperature.

Cross charge: A control with asealed bulb that contains two differ-ent fluids that work together for acommon specific condition.

Cross liquid charge bulb: A typeof charge in the sensing bulb of theTXV that has different characteris-tics from the system refrigerant.This is designed to help prevent liq-uid refrigerant from flooding to thecompressor at start-up.

Cross vapor charge bulb: Similarto the vapor charge bulb but con-tains a fluid different from the sys-tem refrigerant. This is a special-type charge and produces a differ-ent pressure/temperature relation-ship under different conditions.

Crystallization: When a salt solu-tion becomes too concentrated andpart of the solution turns to salt.

Current, electrical: Electrons flow-ing along a conductor.

Current relay: An electrical deviceactivated by a change in currentflow.

Cut-in and cut-out: The two pointsat which a control opens or closesits contacts based on the conditionit is supposed to maintain.

Cycle: A complete sequence ofevents (from start to finish) in a sys-tem.

Cylinder: A circular container withstraight sides used to contain fluidsor to contain the compression pro-cess (the piston movement) in acompressor.

Cylinder head, compressor: Thetop of the cylinder on the high-pres-sure side of the compressor.

Cylinder unloading: A method ofproviding capacity control by caus-ing a cylinder in a reciprocatingcompressor to stop pumping.

Damper: A component in an airdistribution system that restricts air-flow for the purpose of air balance.

Declination angle: The angle ofthe tilt of the earth on its axis.

Defrost: Melting of ice.

Defrost cycle: The portion of therefrigeration cycle that melts the iceoff the evaporator.

Defrost timer: A timer used to startand stop the defrost cycle.

Degreaser: A cleaning solutionused to remove grease from partsand coils.

Dehumidify: To remove moisturefrom air.

Dehydrate: To remove moisturefrom a sealed system or a product.

Density: The weight per unit of vol-ume of a substance.

Desiccant: Substance in a refriger-ation system drier that collectsmoisture.

Design pressure: The pressure atwhich the system is designed tooperate under normal conditions.

De-superheating: Removing heatfrom the superheated hot refriger-ant gas down to the condensingtemperature.

Detector: A device to search andfind.

Dew: Moisture droplets that formon a cool surface.

Dew point: The exact temperatureat which moisture begins to form.

DIAC: A semiconductor often usedas a voltage-sensitive switchingdevice.

Diaphragm: A thin flexible material(metal, rubber or plastic) that sepa-rates two pressure differences.

Die: A tool used to make an exter-nal thread such as on the end of apiece of pipe.

Differential: The difference in thecut-in and cut-out points of a con-trol, pressure, time, temperature orlevel.

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Glossary of TermsDiffuser: The terminal or enddevice in an air distribution systemthat directs air in a specific directionusing louvers.

Diode: A solid state device com-posed of both P-type and N-typematerial. When connected in a cir-cuit one way, current will flow.When the diode is reversed, currentwill not flow.

Direct current: Electricity in whichall electron flow is continuously inone direction.Direct expansion: The term usedto describe an evaporator with anexpansion device other than a low-side float.

Direct-spar ignition (DSI): A sys-tem that provides direct ignition tothe main burner.

Discus compressor: A reciprocat-ing compressor distinguished by itsdisc-type valve system.

Discus valve: A reciprocatingcompressor valve design with a lowclearance volume and larger bore.

Distributor: A component installedat the outlet of the expansion valvethat distributes the refrigerant toeach evaporator circuit.

Doping: Adding an impurity to asemiconductor to produce a desiredcharge.

Double flare: A connection usedon copper, aluminum or steel tubingthat folds tubing wall to a doublethickness.

Dowel pin: A pin which may ormay not be tapered, used to alignand fasten two parts.

Draft gauge: A gauge used tomeasure very small pressure(above and below atmosphere) andcompare them to the atmosphere’spressure. Used to determine theflow of flue gas in a chimney orvent.

Drier: A device used in a refriger-ant line to remove moisture.

Drip pan: A pan shaped to collectmoisture condensing on an evapo-rator coil in an air conditioning orrefrigeration system.

Dry-bulb temperature: The tem-perature measured using a plainthermometer.

Duct: A sealed channel used toconvey air from the system to andfrom the point of utilization.

Eccentric: An off-center devicethat rotates in a circle around ashaft.

Eddy current test: A test with aninstrument to find potential failuresin evaporator or condenser tubes.

Effective temperature: Differentcombinations of temperature andhumidity that provide the samecomfort level.

Electric heat: The process ofusing resistance to convert electri-cal energy into heat.

Electrical power: Measured inwatts. One watt is equal to oneampere flowing with a potential ofone volt. Watt = Volts x Amperes (P= E x I).

Electrical shock: When an electri-cal current travels through a humanbody.

Electromagnet: A coil of wirewrapped around a soft iron corethat creates a magnet.

Electron: The smallest portion ofan atom that carries a negativecharge.

Electronic air filter: A filter thatcharges dust particles using high-voltage direct current and then col-lects these particles on a plate of anopposite charge.

Electronic charging scale: Anelectronically operated scale usedto accurately charge refrigerationsystems by weight.

Electronic expansion valve: Ametering valve that uses a thermis-tor as a temperature-sensing ele-ment that varies the voltage to aheat motor-operated valve.

Electronic leak detector: Aninstrument used to detect gases invery small portions by using elec-tronic sensors and circuits.

Electronics: The use of electronflow in conductors, semiconductorsand other devices.

Emitter: A terminal on a semicon-ductor.

End bell: The end structure of anelectric motor that normally con-tains the bearings and lubricationsystem.

End play: The amount of lateraltravel in a motor or pump shaft.

Energy: The capacity for doingwork.

Energy efficiency ratio (EER): Anequipment efficiency rating that isdetermined by dividing the output inBTUH by the input in watts. Thisdoes not take into account thestartup and shutdown for eachcycle.

Enthalpy: The amount of heat asubstance contains determinedfrom a predetermined base or point.

Environment: Our surroundings,including the atmosphere.

Ethane gas: The fossil fuel, naturalgas, used for heat.

Evacuation: The removal of anygases not characteristic to a systemor vessel.

Evaporation: The condition thatoccurs when heat is absorbed byliquid and changes to vapor.

Evaporator: The component in arefrigeration system that absorbsheat into the system and evapo-rates the liquid refrigerant.

Evaporator fan: A forced convec-tor used to improve the efficiency ofan evaporator by air movementover the coil.

Evaporator pressure regulator(EPR): A mechanical controlinstalled in the suction line at theevaporator outlet that keeps theevaporator pressure from droppingbelow a certain point.

Evaporator types: Flooded – anevaporator where the liquid refriger-ant level is maintained to the top ofthe heat exchange coil. Dry type –an evaporator coil that achieves theheat exchange process with a mini-mum of refrigerant charge.

Exhaust valve: The movable com-ponent in a refrigeration compres-sor that allows hot gas to flow to thecondenser and prevents it fromrefilling the cylinder on the down-stroke.

Expansion (metering) device:The component between the high-pressure liquid line and the evapo-rator that feeds the liquid refrigerantinto the evaporator.

Expansion joint: A flexible portionof a piping system or building struc-ture that allows for expansion of thematerials due to temperaturechanges.

External drive: An external type ofcompressor motor drive, asopposed to a hermetic compressor.

External equalizer: The connec-tion from the evaporator outlet tothe bottom of the diaphragm on athermostatic expansion valve.Fahrenheit scale: The tempera-ture scale that places the boilingpoint of water at 212°F and thefreezing point at 32°F.

Fan: A device that produces apressure difference in air to move it.

Fan cycling: The use of a pres-sure control to turn a condenser fanon or off to maintain a correct pres-sure within the system.

Fan relay coil: A magnetic coil thatcontrols the starting and stopping ofa fan.

Farad: The unit of capacity of acapacitor. Capacitors in the HVACindustry are rated in microfarads.

Female thread: The interal threadin a fitting.

Fill or wetted-surface method:Water in a cooling tower is spreadout over a wetted surface while airis passed over it to enhance evapo-ration.

Film factor: The relationshipbetween the medium giving up heatand the heat exchange surface(evaporator). This is related to thethe velocity of the medium passingover the evaporator. When thevelocity is too slow, the filmbetween the air and the evaporatorbecomes greater and becomes aninsulator, which slows the heatexchange.

Filter: A fine mesh or porous mate-rial that removes particles frompassing fluids.

Fin comb: A hand tool used tostraighten the fins on an air-cooledcondenser.

48

Glossary of TermsFixed resistor: A nonadjustableresistor. The resistance cannot bechanged.

Fixed-bore device: An expansiondevice with a fixed diameter thatdoes not adjust to varying load con-ditions.

Flapper valve: See reed valve.

Flare: The angle that may be fash-ioned at the end of a piece of tubingto match a fitting and create a leak-free connection.

Flare nut: A connector used in aflare assembly for tubing.

Flash gas: A term used to describethe pressure drop in an expansiondevice when some of the liquidpassing through the valve ischanged quickly to a gas and coolsthe remaining liquid to the corre-sponding temperature.

Float, valve or switch: An assem-bly used to maintain or monitor aliquid level.

Flooded system: A refrigerationsystem operated with the liquidrefrigerant level very close to theoutlet of the evaporator coil forimproved heat exchange.

Flue: The duct that carries theproducts of combustion out of astructure for a fossil or solid-fuelsystem.

Flue-gas analysis instruments:Instruments used to analyze theoperation of fossil fuel burningequipment such as oil and gas fur-naces by analyzing the flue gases.

Fluid: The state of matter of liquidsand gases.

Fluid expansion device: Using abulb or sensor, tube and diaphragmfilled with fluid, this device will pro-duce movement at the diaphragmwhen the fluid is heated or cooled.A bellows may be added to producemore movement. The devices mycontain vapor and liquid.Flush: The process of using a fluidto push contaminants from a sys-tem.

Flux: A substance applied to sol-dered and brazed connections toprevent oxidation during the heatingprocess.

Foaming: A term used to describeoil when is has liquid refrigerantboiling out of it.

Foot-pound: The amount of workaccomplished by lifting 1 lb. ofweight 1 ft.; a unit of energy.

Force: Energy exerted.

Forced convection: The move-ment of fluid by mechanical means.

Fossil fuels: Natural gas, oil andcoal formed millions of years agofrom dead plants and animals.

Four-way valve: The valve in aheat pump system that changes thedirection of the refrigerant flowbetween the heating and coolingcycles.

Freezer burn: The term applied tofrozen food when it becomes dryand hard from dehydration due topoor packaging.

Freeze up: Excess ice or frostaccumulation on an evaporator tothe point that airflow may beaffected.

Freezing: The change of state ofwater from liquid to solid.

Freon: The trade name for refriger-ants manufactured by E.I. duPontde Nemours & Co., Inc.

Frequency: The cycles per second(CPS) of the electrical current sup-plied by the power company. Thisis normally 60 CPS in the UnitedStates.

Front seated: A position on avalve that will not allow refrigerantto flow in one direction.

Frost back: A condition of frost onthe suction line and even the com-pressor body usually due to liquidrefrigerant in the suction line.

Frostbite: When skin freezes.

Frozen: The term used to describewater in the solid state; also used todescribe a rotating shaft that will notturn.

Fuel oil: The fossil fuel used forheating; a petroleum distillate.

Full-load amperage (FLA): Thecurrent an electric motor drawswhile operating under a full-loadcondition. Also called the Run-loadamperage.

Furnace: Equipment used to con-vert heating energy such as fuel oil,gas or electricity to useable heat. Itusually contains a heat exchanger,a blower and the controls to operatethe system.

Fuse: A safety device used in elec-trical circuits for the protection ofthe circuit conductor and compo-nents.

Fusible link: An electrical safetydevice normally located in a furnacethat burns and opens the circuitduring an overheat situation.

Fusible plug: A device (made oflow-melting temperature metal)used in pressure vessels that issensitive to low temperatures andrelieves the vessel contents in anoverheating situation.

Gas: The vapor state of matter.

Gas-pressure switch: Used todetect gas pressure before hasburners are allowed to ignite.

Gas valve: A valve used to stop,start or modulate the flow of naturalgas.

Gasket: A thin piece of flexiblematerial used between two metalplates to prevent leakage.

Gate: A terminal on a semiconduc-tor.

Gauge: An instrument used todetect pressure.

Gauge manifold: A tool that mayhave more than one gauge with avalve arrangement to control fluidflow.

Gauge port: The service port usedto attach a gauge for service proce-dures.

Germanium: A substance fromwhich many semiconductors aremade.

Glow coil: A device that automati-cally reignites a pilot light if it goesout.

Graduated cylinder: A cylinderwith a visible column of liquid refrig-erant used to measure the refriger-ant charged into a system.Refrigerant temperatures can bedialed on the graduated cylinder.

Grille: A louvered, often decora-tive, component in an air system atthe inlet or the outlet of the airflow.

Grommet: A rubber, plastic ormetal protector usually used wherewire or pipe goes through a metalpanel.

Ground, electrical: A circuit orpath for electron flow to the earthground.

Ground wire: A wire from theframe of an electrical device to bewire to the earth ground.

Guide vanes: Vanes used to pro-duce capacity control in a centrifu-gal compressor. Also calledproratation guide vanes.

Halide refrigerants: Refrigerantsthat contain halogen chemicals; R-12, R-22, R-500 and R-502 areamong them.

Halide torch: A torch-type leakdetector used to detect the halogenrefrigerants.

Halogens: Chemical substancesfound in many refrigerants contain-ing chlorine, bromine, iodine andfluorine.

Hand truck: A two-wheeled pieceof equipment that can be used formoving heavy parts.

Hanger: A device used to supporttubing, pipe, duct or other compo-nents of a system.

Head: Another term for pressure,usually referring to gas or liquid.

Head pressure control: A controlthat regulates the head pressure ina refrigeration or air conditioningsystem.

Header: A pipe or containment towhich other pipe lines are con-nected.

Heat: Energy that causes mole-cules to be in motion and to raisethe temperature of a substance.

Heat anticipator: A device thatanticipates the need for cutting offthe heating system prematurely sothe fan can cool the furnace.

Heat coil: A device made of tubingor pipe designed to transfer heat toa cooler substance by using fluids.

Heat exchanger: A device thattransfers heat from one substanceto another.

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Glossary of TermsHeat of compression: That part ofthe energy from the pressurizationof a gas or a liquid converted toheat.

Heat of fusion: The heat releasedwhen a substance is changing froma liquid to a solid.

Heat of respiration: When oxygenand carbon hydrates are taken in bysubstance or when carbon dioxideor water are given off. Associatedwith fresh fruits and vegetablesduring their aging process whilestored.

Heat pump: A refrigeration systemused to supply heat or cooling usingvalves to reverse the refrigerant gasflow.

Heat reclaim: Using heat from acondenser for purposes such asspace and domestic water heating.

Heat sink: A low-temperature sur-face to which heat can transfer.

Heat transfer: The transfer of heatfrom a warmer to a colder sub-stance.

Helix coil: A bimetal formed into ahelix-shaped coil that provides lon-ger travel when heated.

Hermetic system: A totallyenclosed refrigeration systemwhere the motor and compressorare sealed within the same systemwith the refrigerant.

Hertz: Cycles per second.

Hg: The chemical symbol for theelement mercury.

High-pressure control: A controlthat stops a boiling heating deviceor a compressor when the pressurebecomes too high.

High side: A term used to indicatethe high-pressure or condensingside of the refrigeration system.

High-temperature refrigeration:A refrigeration temperature rangestarting with evaporator tempera-tures no lower than 35°F, a rangeusually used in air conditioning(cooling).

High-vacuum pump: A pump thatcan produce a vacuum in the lowmicron range.

Horsepower: A unit equal to33,000 ft-lb of work per minute.

Hot gas: The refrigerant vapor as itleaves the compressor. This isoften used to defrost evaporators.

Hot gas bypass: Piping thatallows hot refrigerant gas into thecooler low-pressure side of a refrig-eration system usually for systemcapacity control.

Hot gas defrost: A system wherethe hot refrigerant gases arepassed through the evaporator todefrost it.

Hot gas line: The tubing betweenthe compressor and condenser.

Hot junction: That part of a ther-mocouple or thermopile where heatis applied.

Hot pull down: The process oflowering the refrigerated space tothe design temperature after it hasbeen allowed to warm up consider-ably over this temperature.

Hot water heat: A heating systemusing hot water to distribute theheat.

Hot wire: The wire in an electricalcircuit that has a voltage potentialbetween it and another electricalsource or between it and ground.

Humidifier: A device used to addmoisture to the air.

Humidistat: A control operated bythe change in humidity.

Humidity: Moisture in the air.

Hydraulics: Producing mechanicalmotion by using liquids under pres-sure.

Hydrocarbons: Organic com-pounds containing hydrogen andcarbon found in many heating fuels.

Hydrochlorofluorocarbons(HCFC): Refrigerants thought tocontribute to the depletion of theozone layer although not to theextent of chlorofluorocarbons.

Hydrometer: An instrument usedto measure the specific gravity of aliquid.

Hydronic: Usually refers to a hotwater heating system.

Hygrometer: An instrument usedto measure the amount of moisturein the air.

Idler: A pully on which a belt rides.It does not transfer power but isused to provide tension or reducevibration.

Ignition transformer: Provides ahigh-voltage current, usually to pro-duce a spark to ignite a furnacefuel, either gas or oil.

Impedance: A form of resistancein an alternating current circuit.

Impeller: The rotating part of apump that causes the centrifugalforce to develop fluid flow and pres-sure difference.

Impingement: The condition in agas or oil furnace when the flamestrikes the sides of the combustionchamber, resulting in poor combus-tion efficiency.

Inclined water manometer: Indi-cates air pressures in very low pres-sure systems.

Induced magnetism: Magnetismproduced, usually in a metal, fromanother magnetic field.

Inductance: An induced voltageproducing a resistance in an alter-nating current circuit.

Induction motor: An alternatingcurrent motor where the rotor turnsfrom induced magnetism from thefield windings.

Inductive reactance: A resistanceto the flow of an alternating currentproduced by an electromagneticinduction.

Inert gas: A gas that will not sup-port most chemical reactions, par-ticularly oxidation.

Infiltration: Air that leaks into astructure through cracks, windows,doors or other openings due to lesspressure inside the structure thanoutside the structure.

Infrared rays: The rays that trans-fer heat by radiation.

In-phase: When two or more alter-nating current circuits have thesame polarity at all times.

Insulation, electric: A substancethat is a poor conductor of electric-ity.

Insulation, thermal: A substancethat is a poor conductor of the flowof heat.

Intermittent ignition: Ignition sys-tem for a gas furnace that operatesonly when needed or when the fur-nace is operating.

Isolation relays: Componentsused to prevent stray unwantedelectrical feedback that can causeerratic operation.

Joule: Metric measurement termused to express the quantity ofenergy.

Junction box: A metal or plasticbox within which electrical connec-tions are made.

Kelvin: A temperature scale whereabsolute 0 equals 0 or wheremolecular motion stops at 0. It hasthe same graduations per degree ofchange as the Celsius scale.

Kilopascal: A metric unit of mea-surement for pressure used in theair conditioning, heating and refrig-eration field. There are 6.89 kilo-pascals in 1 PSI.

Kilowatt: A unit of electrical powerequal to 1000 watts.

Kilowatt-hour: 1 kilowatt (1000watts) of energy used for 1 hour.

King valve: A service valve at theliquid receiver.

Latent heat: Heat energyabsorbed or rejected when a sub-stance is changing state and thereis no change in temperature.

Leak detector: Any device used todetect leaks in a pressurized sys-tem.

Lever truck: A long-handled, two-wheeled device that can be used tolift and assist in moving heavyobjects.

Limit control: A control used tomake a change in a system, usuallyto stop it when predetermined limitsof pressure or temperature arereached.

Line set: A term used for tubingsets furnished by the manufacturer.

Liquefied petroleum: Liquefiedpropane, butante or a combinationof these gases. The gas is kept asa liquid under pressure until readyto use.

Liquid: A substance where mole-cules push outward and downwardand seek a uniform level.

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Glossary of TermsLiquid charge bulb: A type ofcharge in the sensing bulb of thethermostatic expansion valves.This charge is characteristic of therefrigerant in the system and con-tains enough liquid so that it will nottotally boil away.

Liquid line: A term applied in theindustry to refer to the tubing or pip-ing from the condenser to theexpansion device.

Liquid receiver: A container in therefrigeration system where liquidrefrigerant is stored.

Liquid refrigerant charging: Theprocess of allowing liquid refrigerantto enter the refrigeration systemthrough the liquid line to the con-denser and evaporator.

Liquid slugging: A large amountof liquid refrigerant in the compres-sor cylinder, usually causing imme-diate damage.

Lithium-bromide: A type of saltsolution used in an absorptionchiller.

Locked-rotor amperage (LRA):The current an electric motor drawswhen it is first turned on. This isnormally five times the full-loadamperage.

Low-pressure control: A pressureswitch that can provide low chargeprotection by shutting down the sys-tem on low pressure. It can also beused to control space temperature.

Low side: A term used to refer tothe part of the refrigeration systemthat operates at the lowest pres-sure, between the expansion deviceand the compressor.

Low-temperature refrigeration: Arefrigeration temperature rangestarting with evaporator tempera-tures no higher than 0°F for storingfrozen food.

LP fuel: Liquefied petroleum. Asubstance used as a gas for fuel. Itis transported and stored in the liq-uid state.

Magnetic field: A field or spacewhere magnetic lines of force exist.

Magnetism: A force causing amagnetic field to attract ferrous met-als or where like poles of a magnetrepel and unlike poles attract eachother.

Male thread: A thread on the out-side of a pipe, fitting or cylinder; anexternal thread.

Manometer: An instrument used tocheck low vapor pressures. Thepressures may be checked againsta column of mercury or water.

Mapp gas: A composite gas simi-lar to propane that may be usedwith air.

Marine water box: A water boxwith removable cover.

Mass: Matter held together to theextent that it is considered onebody.

Mass spectrum analysis: Anabsorption machine factory leaktest performed using helium.

Matter: A substance that takes upspace and has weight.

Medium-temperature refrigera-tion:Refrigeration where evaporatortemperatures are 32°F or below,normally used for preserving freshfood.

Megger: An instrument (meg-ohmeter) that can detect very highresistance, in millions of ohms.Megger relates to megohm or1,000,000 ohms.

Melting point: The temperature atwhich a substance will change froma solid to a liquid.

Mercury bulb: A glass bulb con-taining a small amount of mercuryand electrical contacts used tomake and break the electrical circuitin a low-voltage thermostat.

Metering device: A valve or smallfixed-size tubing or orifice thatmeters liquid refrigerant into theevaporator.

Methane: A combustible hydrocar-bon. Natural gas is composed of90% to 95% methane.

Metric system: System Interna-tional (SI) – system of measure-ment used by most countries in theworld.

Micro: A prefix meaning 1/1,000,000.

Microfarad: Capacitor capacityequal to 1/1,000,000 of a farad

Micron: A unit of length equal to 1/1000 of a millimeter, 1/1,000,000 ofa meter.

Micron gauge: A gauge usedwhen it is necessary to measurepressure close to a perfect vacuum.

Midseated (cracked): A positionon a valve that allows refrigerantflow in all directions.

Milli: A prefix meaning 1/1000.

Modulator: A device that adjustsby small increments or changes.

Moisture indicator: A device fordetermining moisture in a refriger-ant.

Molecular motion: The movementof molecules within a substance.

Motor service factor: A factorabove an electric motor’s normaloperating design parameters, indi-cated on the nameplate, underwhich it can operate.

Motor starter: Electromagneticcontactors that contain motor pro-tection and are used for switchingelectric motors on and off.

Muffler compressor: Soundabsorber at the compressor.

Mullion: Stationary frame betweentwo doors.

Mullion heater: Heating elementmounted in mullion of a refrigeratorto keep moisture from forming on it.

Multimeter: An instrument that willmeasure voltage, resistance andmilliamperes.

Multiple evacuation: An proce-dure for removing the refrigerantfrom a system. A vacuum is pulled,a small amount of refrigerantallowed into the system and theprocedure duplicated. This is oftendone three times.

National electrical code (NEC): Apublication that sets the standardsfor all electrical installations, includ-ing motor overload protection.

National pipe taper (NPT): Thestandard designation for a stan-dard tapered pipe thread.

Natural convection: The naturalmovement of a gas or fluid causedby differences in temperature.

Natural gas: A fossil fuel formedover millions of years from deadvegetation and animals that weredeposited or washed deep into theearth.

Needlepoint valve: A device hav-ing a needle and a very small orificefor controlling the flow of a fluid.

Negative electrical charge: Anatom or component that has anexcess of electrons.

Neoprene: Synthetic flexible mate-rial used for gaskets and seals.

Net oil pressure: Difference in thesuction pressure and the compres-sor oil pump outlet pressure.

Neutralizer: A substance used tocounteract acids.

Newton/meter2: Metric unit ofmeasurement for pressure. Alsocalled a pascal.

Nichrome: A metal made of nickelchromium that when formed into awire is used as a resistance heatingelement in electric heaters and fur-naces.

Nitrogen: An inert gas often usedto “sweep” a refrigeration system tohelp ensure that all refrigerant andcontaminants have been removed.

Nominal: A rounded-off statedsize. The nominal size is the clos-est rounded-off size.

Noncondensable gas: A gas thatdoes not change into a liquid undernormal operation conditions.

Nonferrous: Metals containing noiron.

North pole, magnetic: One end ofa magnet.

Ohm: A unit of measurement ofelectrical resistance.

Ohmmeter: A meter that measureselectrical resistance.

Ohm’s law: A law involving electri-cal relationships discovered byGeorge Ohm: E = I x R.

Oil-pressure safety control(switch): A control used to ensurethat a compressor has adequate oillubricating pressure.

Oil, refrigeration: Oil used inrefrigeration systems.

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Glossary of TermsOil separator: Apparatus thatremoves oil from a gaseous refrig-erant.Open compressor: A compressorwith an external drive.

Operating pressure: The actualpressure under operation condi-tions.

Organic: Materials formed from liv-ing organisms.

Orifice: A small opening throughwhich fluid flows.

Overload protection: A system ordevice that will shut down a systemif an overcurrent condition exists.

Oxidation: The combining of amaterial with oxygen to form a dif-ferent substance. This results inthe deterioration of the original sub-stance.

Ozone: A form of oxygen (O3). Alayer of ozone in the stratospherethat protects the earth from certainof the sun’s ultraviolet wavelengths.

Package unit: A refrigeration sys-tem where all major componentsare located in one cabinet.

Packing: A soft material that canbe shaped and compressed to pro-vide a seal. It is commonly appliedaround valve stems.

Parallel circuit: An electrical orfluid circuit where the current orfluid takes more than one path at ajunction.

Passive solar design: The use ofnon-moving parts of a building toprovide heat or cooling or to elimi-nate certain parts of a building thatcause inefficient heating or cooling.

PE (polyethylene): Plastic pipeused for water, gas and irrigationsystems.

Permanent magnet: An object thathas its own permanent magneticfield.

Permanent split-capacitor (PSC)motor: A split-phase motor with arun capacitor only. It has a very lowstarting torque.

Phase: One distinct part of a cycle.

Pilot light: The flame that ignitesthe main burner on a gas furnace.Piston: The part that moves upand down in a cylinder.

Piston displacement: The volumewithin the cylinder that is displacedwith the movement of the pistonfrom top to bottom.

Pitot tube: Part of an instrumentfor measuring air velocities.

Planned defrost: Shutting thecompressor off with a timer so thatthe space temperature can providethe defrost.

Plenum: A sealed chamber at theinlet or outlet of an air handler. Theduct attaches to the plenum.

Polycyclic organic matter: By-products of wood combustion foundin smoke and considered to behealth hazards.

Polyphase: Three or more phases.

Porcelain: A ceramic material.

Portable dolly: A small platformwith four wheels on which heavyobjects can be placed and moved.

Positive displacement: A termused with a pumping device suchas a compressor that is designed tomove all matter from a volume suchas a cylinder or it will stall, possiblycausing failure of a part.

Positive electrical charge: Anatom or component that has ashortage of electrons.

Positive temperature coefficientstart device: A thermistor used toprovide start assistance to a per-manent split-capacitor motor.

Potention relay: A switchingdevice used with hermetic motorsthat breaks the circuit to the startwindings after the motor hasreached approximately 75% of itsrunning speed.

Potentiometer: An instrument thatcontrols electrical current.

Power: The rate at which work isdone.

Pressure: Force per unit of area.

Pressure drop: The difference inpressure between two points.

Pressure/enghalpy diagram: Achart indicating the pressure andheat content of a refrigerant and theextent to which the refrigerant is aliquid and vapor.

Pressure limiter: A device thatopens when a certain pressure isreached.

Pressure-limiting TXV: A valvedesigned to allow the evaporator tobuild only to a predetermined tem-perature when the valve will shut offthe flow of refrigerant.

Pressure switch: A switch oper-ated by a change in pressure.

Pressure/temperature relation-ship: This refers to the pressure/temperature relationship of a liquidand vapor in a closed container. Ifthe temperature increases, thepressure will also increase. If thetemperature is lowered, the pres-sure will decrease.

Pressure vessels and piping:Piping, tubing, cylinders, drums andother containers that have pressur-ized contents.

Primary control: Controllingdevice for an oil burner to ensureignition within a specific time span,usually 90 seconds.

Propane: An LP gas used for heat.Proton: That part of an atom hav-ing a positive charge.

PSI: Abbreviation for pounds persquare inch.

PSIA: Abbreviation for pounds persquare inch absolute.

PSIG: Abbreviation for pounds persquare inch gauge.

Psychrometer: An instrument fordetermining relative humidity.

Psychrometric chart: A chart thatshows the relationship of tempera-ture, pressure and humidity in theair.

Pump: A device that forces fluidsthrough a system.

Pump down: To use a compressorto pump the refrigerant charge intothe condenser and/or receiver.

Purge: To remove or release fluidfrom a system.

PVC (polyvinyl chloride): Plasticpipe used in pressure applicationsfor water and gas as well as forsewage and certain industrial appli-cations.

Quench: To submerge a hot objectin a fluid for cooling.

Quick-connect coupling: Adevice designed for easy connect-ing or disconnecting of fluid lines.

R-12: Dichlorodifluoromethane, apopular refrigerant for refrigerationsystems.

R-22: Monochlorodifluoromethane,a popular refrigerant for air condi-tioning systems.

R-123: Dichlorotrifluoroethane, arefrigerant developed for low pres-sure application.

R134a: Tetrafluoroethane, a refrig-erant developed for refrigerationsystems and as a possible replace-ment for R-12.

R-502: An azeotropic mixture of R-22 and R-115, a popular refrigerantfor low-temperature refrigerationsystems.

Radiant heat: Heat that passesthrough air, heating solid objectsthat in turn heat the surroundingarea.

Radiation: Heat transfer. Seeradiant heat.

Random or off-cycle defrost:Defrost provided by the space tem-perature during the normal off cycle.

Rankine: The absolute Fahrenheitscale with 0 at the point where allmolecular motion stops.

Reactance: A type of resistance inalternating current circuit.

Reamer: Tool to remove burrsfrom inside a pipe after it has beencut.

Receiver-drier: A component in arefrigeration system for storing anddrying refrigerant.

Reciprocating: Back-and-forthmotion.

Reciprocating compressor: Acompressor that uses a piston in acylinder and a back-and-forthmotion to compress vapor.

Rectifier: A device for changingalternating current to direct current.

Reed valve: A thin steel plate usedas a valve in a compressor.

Refrigerant: The fluid in a refriger-ation system that changes from aliquid to a vapor and back to a liquidat practical pressures.

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Glossary of TermsRefrigerant reclaim: Recoveringthe refrigerant and processing it sothat it can be reused. Refrigerant isprocessed to new product specifica-tions by means which may includedistillation. It requires chemicalanalysis of the refrigerant to deter-mine appropriate specifications aremet. The term usually implies theuse of processes or proceduresavailable only at a reprocessing ormanufacturing facility.

Refrigerant recovery: To removerefrigerant in any condition from asystem and store it in an externalcontainer without necessarily test-ing or processing it in any way.

Refrigerant recycling: To cleanthe refrigerant by oil separation andsingle or multiple passes throughdevices such as replaceable corefilter driers, which reduce moisture,acidity and particulate matter. Thisterm usually applies to proceduresimplemented at the job site or at alocal service shop.

Refrigeration: The process ofremoving heat from a place where itis not wanted and transferring it to aplace where it makes little or no dif-ference.

Register: A terminal device on anair distribution system that directsair but also has a damper to adjustair flow.

Relative humidity: The amount ofmoisture contained in the air ascompared to the amount the aircould hold at that temperature.

Relay: A small electromagneticdevice to control a switch, motor orvalve.

Relief valve: A valve designed toopen and release liquids at a cer-tain pressure.

Remote system: Often called asplit system where the condenser islocated away from the evaporatorand/or other parts of the system.

Resistance: The opposition to theflow of an electrical current or afluid.

Resistor: An electrical or elec-tronic component with a specificopposition to electron flow. It isused to create voltage drop or heat.

Restrictor: A device used to cre-ate a planned resistance to fluidflow.

Reverse cycle: The ability to directthe hot gas flow into the indoor orthe outdoor coil in heat pump tocontrol the system for heating orcooling purposes.

Rod and tube: The rod and tubeare each made of a different metal.The tube has a high expansion rateand the rod a low expansion rate.

Rotary compressor: A compres-sor that uses rotary motion to pumpfluids. It is a positive-displacementpump.

Rotor: The rotating or movingcomponent of a motor, including theshaft.

Running time: The time a unitoperates. Also called the on time.

Run winding: The electrical wind-ing in a motor that draws currentduring the entire running cycle.

Rupture disk: Safety device for acentrifugal low-pressure chiller.

Saddle valve: A valve that strad-dles a fluid line and is fastened bysolder or screws. It normally con-tains a device to puncture the linefor pressure readings.

Safety control: An electrical,mechanical or electromechanicalcontrol to protect the equipment orpublic from harm.

Safety plug: A fusible plug.

Sail switch: A safety switch with alightweight sensitive sail that oper-ates by sensing an airflow.

Saturated vapor: The refrigerantwhen all of the liquid has changedto a vapor.

Saturation: A term used todescribe a substance when it con-tains all of another substance it canhold.

Scavenger pump: A pump used toremoved the fluid from a sump.

Schrader valve: A valve similar tothe valve on an auto tire that allowsrefrigerant to be charged or dis-charged from the system.

Scotch yoke: A mechanism usedto create reciprocating motion fromthe electric motor drive in very smallcompressors.

Screw compressor: A form ofpositive-displacement compressorthat squeezes fluid from a low-pres-sure area to a high-pressure area,using screw-type mechanisms.

Scroll compressor: A compressorthat uses two scroll-type compo-nents to compress vapor.

Sealed unit: The term used todescribe a refrigeration system,including the compressor, that iscompletely welded closed. Thepressure can be accessed by sad-dle valves.

Seasonal energy efficiency ratio(SEER): An equipment efficiencyrating that takes into account thatstartup and shutdown for eachcycle.

Seat: The stationary part of a valvethat the moving part of the valvepresses against for shutoff.

Semiconductor: A component inan electronic system that is consid-ered neither an insulator nor a con-ductor but a partial conductor.

Semihermetic compressor: Amotor compressor that can beopened or disassembled by remov-ing by removing bolts and flanges.Also known as a serviceable her-metic.

Sensible heat: Heat that causes achange in the level of a thermome-ter.

Sensor: A component for detectionthat changes shape, form or resis-tance when a condition changes.

Sequencer: A control that causesa staging of events, such as asequencer between stages of elec-tric heat.

Series circuit: An electrical or pip-ing circuit where all of the current orfluid flow through the entire circuit.

Service valve: A manually oper-ated valve in a refrigeration systemused for various service proce-dures.

Serviceable hermetic: See semi-hermetic compressor.

Shaded-pole motor: An alternat-ing current motor used for very lightloads.

Shell and coil: A vessel with a coilof tubing inside that can normally bemechanically cleaned.

Short circuit: A circuit that doesnot have the correct measureableresistance, too much current flowand will overload the conductors.

Short cycle: The term used todescribe the running time (on time)of a unit when it is not running longenough.

Shroud: A fan housing thatensures maximum airflow throughthe coil.

Sight glass: A clear window in afluid line.

Silica gel: A chemical compoundoften used in refrigerant driers toremove moisture from the refriger-ant.

Silicon: A substance from whichmany semiconductors are made.

Silicon-controlled rectifier (SCR):A semiconductor control device.

Silver brazing: A high-tempera-ture (above 800°F) brazing processfor bonding materials.

Sine wave: The graph or curveused to describe the characteristicsof alternating current voltage.

Single phase: The electrical powersupplied to equipment or smallmotors, normally under 7-1/2 HP.

Single phasing: The condition in athree-phase motor when one phaseof the power supply is open.

Sling psychrometer: A devicewith two thermometers, one a wetbulb and one a dry bulb, used forchecking air conditions, tempera-ture and humidity.

Slip: The difference in the ratedRPM of a motor and the actualoperating RPM.

Slugging: A term used to describethe condition when large amounts aliquid enter a pumping compressorcylinder.

Smoke test: A test performed todetermine the amount of unburnedfuel in an oil burner flue-gas sample.

Snap-disc: An application ofbimetal. Two different metals fas-tened together in the form of a discthat provides a warping conditionwhen heated. This also provides asnap action that is beneficial in con-trols that start and stop current flowin electrical circuits.

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Glossary of TermsSolar collectors: Components of asolar system designed to collect theheat from the sun using air, liquid orrefrigerant as the medium.

Solar heat: Heat from the sun’srays.

Soldering: Fastening two basemetals together by using a third,filler metal that melts at a tempera-ture below 800°F.

Solder pot: A device using a low-melting solder and an overloadheater sized for the amperage ofthe motor it is protecting. The sol-der will melt, opening the circuitwhen there is an overload. It canbe reset.

Solenoid: A coil of wire designedto carry an electrical current produc-ing a magnetic field.

Solid: Molecules of a solid arehighly attracted to each other form-ing a mass that exerts all of itsweight downward.

Specific gravity: The weight of asubstance compared to the weightof an equal volume of water.

Specific heat: The amount of heatrequired to raise the temperature of1 lb. of substance 1°F

Specific volume: The volumeoccupied by 1 lb. of a fluid.

Splash lubrication system: Asystem of furnishing lubrication to acompressor by agitating the oil.

Splash method: A method ofwater dropping from a higher eleva-tion in a cooling tower and splash-ing on slots with air passing throughfor more efficient evaporation.

Split-phase motor: A motor withrun and start windings.

Split system: A refrigeration or airconditioning system that has thecondensing unit remote from theindoor (evaporator) coil.

Spray pond: A pond with sprayheads used for cooling water inwater-cooled air conditioning orrefrigeration systems.

Squirrel cage fan: A fan assemblyused to move air.

Standard atmosphere or stan-dard conditions: Air at sea level at70°F when the atmosphere’s pres-sure is 14.696 PSIA (29.92 in. Hg).Air at this condition has a volume of13.33 cu. ft./lb.

Standing pilot: Pilot flame thatremains burning continuously.

Start capacitator: A capacitorused to help an electric motor start.

Starting relay: An electrical relayused to disconnect the start windingin a hermetic compressor.

Starting winding: The winding in amotor used primarily to give themotor extra starting torque.

Starved coil: The condition in anevaporator when the meteringdevice is not feeding enough refrig-erant to the evaporator.

Stator: The component in a motorthat contains the windings; it doesnot turn.

Steam: The vapor state of water.

Strainer: A fine-mesh device thatallows fluid flow and holds backsolid particles.

Stratification: The conditionwhere a fluid appears in layers.

Stress crack: A crack in piping orother component caused by age orabnormal conditions such as vibra-tion.

Subbase: The part of a space tem-perature thermostat that is mountedon the wall and to which the inter-connecting wiring is attached.

Subcooling: The temperature of aliquid when it is cooled below itscondensing temperature.

Sublimation: When a substancechanges from the solid state to thevapor state without going throughthe liquid state.

Suction gas: The refrigerant vaporin an operating refrigeration systemfound in the tubing from the evapo-rator to the compressor and in thecompressor shell.

Suction line: The pipe that carriesthe heat-laden refrigerant from theevaporator to the compressor.

Suction service valve: A manuallyoperated valve with front and backseats located at the compressor.

Suction valve lift unloading: Thesuction valve in a reciprocatingcompressor cylinder is lifted, caus-ing that cylinder to stop pumping.

Sump: A reservoir at the bottom ofa cooling tower to collect the waterthat has passed through the tower.

Superheat: The temperature ofvapor refrigerant above its satura-tion change of state temperature.

Surge: When the head pressurebecomes too great or the evapora-tor pressure too low, refrigerant willflow from the high-to the low-pres-sure side of a centrifugal compres-sor system, making a loud sound.

Swaged joint: The joining of twopieces of copper tubing by expand-ing or stretching the end of onepiece of tubing to fit over the otherpiece.

Swaging tool: A tool used toenlarge a piece of tubing for solderor braze connection.

Swamp cooler: A slang term usedto describe an evaporative cooler.

Sweating: A word used to describemoisture collection on a line or coilthat is operating below the dewpoint temperature of the air.

Tank: A closed vessel used to con-tain a fluid.

Tap: A tool used to cut internalthreads in a fastener or fitting.

Temperature: The level of heat ormolecular activity, expressed inFahrenheit, Rankine, Celsius orKevin units.

Test light: A light bulb arrange-ment used to prove the presence ofelectrical power in a circuit.

Therm: Quantity of heat, 100,000BTU.

Thermistor: A semiconductorelectronic device that changesresistance with a change in tem-perature.

Thermocouple: A device made oftwo unlike metals that generateselectricity when there is a differencein temperature from one end to theother. Thermocouples have a hotand cold junction.

Thermometer: An instrument usedto detect differences in the level ofheat.

Thermopile: A group of thermo-couples connected in series toincrease voltage output.

Thermostat: A device that sensestemperature change and changessome dimension or condition withinto control an operating device.

Thermostatic expansion valve(TXV): A valve used in refrigerationsystems to control the superheat inan evaporator by metering the cor-rect refrigerant flow to the evapora-tor.

Three-phase power: A type ofpower supply usually used for oper-ating heavy loads. It consists ofthree sine waves that are out ofphase with each other.

Throttling: Creating a restriction ina fluid line.Timers: Clock-operated devicesused to time various sequences ofevents in circuits.

Ton of refrigeration: The amountof heat required to melt a ton (2000lb.) of ice at 32°F, 288,000 BTU/24H; 12,000 BTU/H; or 200 BTU/min.

Torque: The twisting force oftenapplied to the starting power of amotor.

Torque wrench: A wrench used toapply a prescribed amount of torqueor tightening to a connector.

Total heat: The total amount ofsensible heat and latent heat con-tained in a substance from a refer-ence point.

Transformer: A coil of wirewrapped around an iron core thatinduces a current to another coil ofwire wrapped around the same ironcore. Note: A transformer canhave an air core.

Transistor: A semiconductor oftenused as a switch or amplifier.

TRIAC: A semiconductor switchingdevice.

Tube within a tube coil: A coilused for heat transfer that has apipe in a pipe and is fastenedtogether so that the outer tubebecomes one circuit and the innertube another.

Tubing: Pipe with a wall used tocarry fluids.

54

Glossary of TermsTwo-temperature valve: A valveused in systems with multiple evap-orators to control the evaporator’spressures and maintain differenttemperatures in each. Sometimescalled a hold-back valve.

Ultraviolet: Light waves that canonly be seen under a special lamp.

Urethane foam: A foam that canbe applied between two walls forinsulation.

U-Tube mercury manometer: AU-tube containing mercury, whichindicates the level of vacuum whileevacuating a refrigeration system.

U-Tube water manometer: Indi-cates natural gas and propane gaspressures. It is usually calibrated ininches of water.Vacuum: The pressure rangebetween the earth’s atmosphereand no pressure, normallyexpressed in inches of mercury (in.Hg) vacuum.

Vacuum pump: A pump used toremove some fluids such as air andmoisture from a system at a pres-sure below the earth’s atmosphere.

Valve: A device used to controlfluid flow.

Valve plate: A plate of steel boltedbetween the head and the body of acompressor that contains the suc-tion and discharge reed or flappervalves.

Valve seat: That part of a valvethat is usually stationary. The mov-able part comes in contact with thevalve seat to stop the flow of fluids.

Vapor: The gaseous state of asubstance.

Vapor barrier: A thin film used inconstruction to keep moisture frommigrating through building materi-als.

Vapor charge valve: A charge in athermostatic expansion valve bulbthat boils to a complete vapor.When this point is reached, anincrease in temperature will not pro-duce an increase in pressure.

Vapor lock: A condition wherevapor is trapped in a liquid line andimpedes liquid flow.

Vapor pump: Another term forcompressor.

Vapor refrigerant charging: Add-ing refrigerant to a system by allow-ing vapor to move out of the vaporspace of a refrigerant cylinder andinto the low-pressure side of therefrigeration system.

Vaporization: The changing of aliquid to a gas or vapor.

Variable pitch pulley: A pulleywhose diameter can be adjusted.

Variable resistor: A type of resis-tor where the resistance can bevaried.

V belt: A belt that has a V-shapedcontact surface and is used to drivecompressors, fans or pumps.

Velocity: The speed at which asubstance passes a point.

Velocity meter: A meter used todetect the velocity of fluids, air orwater.

Volt-ohm-milliammeter (VOM): Amultimeter that measures voltage,resistance and current in milliam-peres.

Voltage: The potential electricaldifference for electron flow from oneline to another in an electrical cir-cuit.

Voltmeter: An instrument used forchecking electrical potential.

Volumetric efficiency: The pump-ing efficiency of a compressor orvacuum pump that describes thepumping capacity in relationship tothe actual volume of the pump.

Vortexing: A whirlpool action inthe sump of a cooling tower.

Water box: A container or reser-voir at the end of a chiller wherewater is introduced and contained.

Water column: The pressure ittakes to push a column of water upvertically. One inch of water columnis the amount of pressure it wouldtake to push a column of water upone inch.

Water-cooled condenser: A con-denser used to reject heat from arefrigeration system into water.

Water-regulating valve: An oper-ating control regulating the flow ofwater.

Watt: A unit of power applied toelectron flow. One watt equals3.414 BTU.

Watt-hour: The unit of power thattakes into consideration the time ofconsumption. It is the equivalent ofa 1-watt bulb burning for 1 hour.

Wet-bulb temperature: A wet-bulbtemperature of air is used to evalu-ate the humidity in the air. It isobtained with a wet thermometerbulb to record the evaporation ratewith an air stream passing over thebulb to help in evaporation.

Wet heat: A heating system usingsteam or hot water as the heatingmedium.

Window unit: An air conditionerinstalled in a window that rejects theheat outside the structure.

Work: A force moving an object inthe direction of the force. Work =Force x Distance.

Tampa

Index

i

AACCESS DOORS

Duct, Ductmate .............................24Duct, Ruskin ........................... 23–24Grease Duct, Ductmate............. 24–25

ACUDORDoors, Access...............................23

ACUTHERMDiffusers, VAV ..............................10

ADJUSTABLEElbows, Crown Products .................13Elbows, Royal Metal Products ..........13

AES INDUSTRIESDampers, Volume Control ...............20Extension Kits, Damper Regulator.....35Regulators, Quadrant .....................36

AIRVECTORGrilles, Filter .................................10Grilles, Return...............................10

ALUMINUM FOILTape, Tyco Adhesives ....................39

AMERICAN LOUVERGrilles, Eggcrate...................... 10–11

ARCHITECTURALCeiling Diffusers, Price..................... 4

ATCO RUBBER PRODUCTSDuct, Flexible................................11

AVIATIONSnips, Midwest Snips .....................38

B

BABCOCK DAVISDoors, Access...............................24

BACKDRAFTDampers, Loren Cook.....................31

BAFFLESSectorizing, Price............................ 9

BATHFans, Broan..................................33

BELLMOUTHTakeoffs, Eastern Sheet Metal..........28

BOOTSPipe, Portals Plus ..........................37

BRICKVents, Sunvent Industries................22

BROANCaps, Roof ...................................32Caps, Wall ...................................32Fans, Bath ...................................33Transitions ...................................32

BRUSHESDuct Sealant, Hardcast ...................38

C

CABLE TIE TOOLSManual, Panduit ............................37

CAPSRoof, Broan ..................................32Tee, Royal Metal Products...............14Wall, Broan ..................................32Wall, Loren Cook ...........................31

CASING & WIREYoung Regulator ...........................20

CEILINGDiffusers, Price............................1–4Diffusers, Selkirk ...........................11Fans, Loren Cook ..........................29Heaters, Markel.............................35

CEILING DIFFUSERSArchitectural, Price.......................... 4Lay-In, Price .................................. 3Slotted, Price ................................. 5

CEILING PANELSPerforated, Price ............................ 2

CERUS INDUSTRIALStarters, HVAC .............................33

CLAMPSPipe, Portals Plus ..........................37

COILSHot Water, Price ............................10

COLLARSSpin-In, Crown Products .................15Spin-In, Flexmaster USA .................16Starting, Crown Products.................14Tab, Royal Metal Products...............14

CONICALReducers, Crown Products ..............16Takeoffs, Crown Products ...............16Takeoffs, Eastern Sheet Metal..........28Taps, Eastern Sheet Metal ..............27Tees, Eastern Sheet Metal ..............27

CONTROLSFan Speed, Loren Cook ..................31Pneumatic, Price ...........................10Remote Cable, Young Regulator.......20

CORE FOR CEILING DIFFUSERPrice ............................................ 5

COUPLINGSFitting, Eastern Sheet Metal .............28Spiral Duct, Eastern Sheet Metal ......28

CROWN PRODUCTSCollars, Spin-In .............................15Collars, Starting.............................14Duct, Flexible................................13Elbows, Adjustable.........................13Pipe, Snaplock ..............................13Reducers, Conical .........................16Takeoffs, Conical...........................16Takeoffs, Rectangular to Round........17Transitions, Duct ...........................19

CURBSRoof, Curbs Plus ...........................34

CURBS PLUSCurbs, Roof ..................................34Supports, Equipment ......................34

D

DAMPER REGULATORExtension Kits, AES Industries .........35

DAMPERSBackdraft, Loren Cook ....................31Fire, Ruskin ............................ 21–22Motorized, Young Regulator.............20Opposed-Blade, Price...............3, 5, 9Radiation, Loren Cook ....................31Round, Jer-Air...............................18Sliding-Blade, Price......................... 3Volume Control, AES Industries........20

DIFFUSERSCeiling, Price ..............................1–4Ceiling, Selkirk ..............................11Linear, Kees .................................. 6Linear, Price .................................. 6Slotted, Price ................................. 6VAV, Acutherm .............................10

DISTRIBUTIONPlenums, Price............................... 6

DOORGrilles, Price .................................. 5

DOORSAccess, Acudor .............................23Access, Babcock Davis...................24

DRILL POINTScrews, Evco................................39

Index

ii

IndexDUCT

Access Doors, Ductmate ................ 24Access Doors, Ruskin ...............23–24Flexible, ATCO Rubber Products...... 11Flexible, Crown Products ................ 13Flexible, Flexmaster USA ............... 12Flexible, Thermaflex ...................... 12Hanging Straps, Royal Metal

Products ...................... 14Sealants, Hardcast ........................ 38Spiral, Eastern Sheet Metal ............. 26Straps, Nelco ............................... 37Tape, Tyco Adhesives.................... 39Transitions, Crown Products............ 19Transitions, Jer-Air ........................ 19Transitions, Price .......................... 19Wrap .......................................... 12Wrap, Reflectix, Inc. ...................... 12

DUCT SEALANTBrushes, Hardcast......................... 38

DUCT WRAPSpacers, Reflectix, Inc.................... 12

DUCTMATEAccess Doors, Duct ....................... 24Access Doors, Grease Duct .......24–25

E

EASTERN SHEET METALCouplings, Fitting .......................... 28Couplings, Spiral Duct.................... 28Duct, Spiral .................................. 26Elbows, Fabricated ........................ 26Elbows, Pressed ........................... 26End Caps .................................... 28End Caps, Pressed ....................... 28Reducers, Fabricated..................... 27Reducers, Pressed ........................ 26Takeoffs, Bellmouth ....................... 28Takeoffs, Conical .......................... 28Taps, Conical ............................... 27Taps, Pressed .............................. 27Tees, Conical ............................... 27Tees, Pressed .............................. 27

EGGCRATEGrilles, American Louver ...........10–11Return Grilles, Price ........................9

ELBOWSAdjustable, Crown Products ............ 13Adjustable, Royal Metal Products ..... 13Fabricated, Eastern Sheet Metal ...... 26Pressed, Eastern Sheet Metal ......... 26

END CAPSEastern Sheet Metal ...................... 28Pressed, Eastern Sheet Metal ......... 28

EQUIPMENTHanging Systems, Gripple .............. 28Supports, Curbs Plus ..................... 34

EVCONut Setters, Magnetic .................... 39Screws, Drill Point ......................... 39Screws, Taper Point ...................... 39

EXHAUSTVentilators, Loren Cook .................. 30

EXTENSION KITSDamper Regulator, AES Industries ... 35

F

FABRICATEDElbows, Eastern Sheet Metal ........... 26Reducers, Eastern Sheet Metal........ 27

FAN FORCEDWall Heaters, Markel ..................... 35

FAN SPEEDControls, Loren Cook ..................... 31

FANSBath, Broan ................................. 33Ceiling, Loren Cook ....................... 29

FASTENERSCaddy Speed Link SLK .................. 28 Keyless Caddy Speed Link Wire System .................................28

FILTERGrilles, Airvector ........................... 10Return Grilles, Price ........................8

FIREDampers, Ruskin .....................21–22

FIRE DAMPER ACCESSORIESRuskin ........................................ 22

FIRESTOPSealants, TVM Building Products ..... 39

FITTINGCouplings, Eastern Sheet Metal ....... 28

FLASHINGSRoof, Portals Plus ......................... 36

FLEXIBLEDuct, ATCO Rubber Products .......... 11Duct, Crown Products .................... 13Duct, Flexmaster USA.................... 12Duct, Thermaflex .......................... 12

FLEXMASTER USACollars, Spin-In ............................. 16Duct, Flexible ............................... 12

FSKTape, Tyco Adhesives.................... 39

FUSELinks .......................................... 23

GGLOSSARY OF TERMS ..........45–53

GRAVITYVentilators, Loren Cook .................. 31

GREASE DUCTAccess Doors, Ductmate ...........24–25

GRILLESDoor, Price ....................................5Eggcrate, American Louver ........10–11Filter, Airvector ............................. 10Return, Airvector ........................... 10Return, Price .............................8, 10Spiral Duct, Price ............................ 7Supply, Price.............................. 7–8

GRIPPLEHanging Systems, Equipment .......... 28

GYPSUMTape, Hardcast ............................. 39

HHANGING

Isolator Kits, Loren Cook ................ 31

HANGING STRAPSDuct, Royal Metal Products ............. 14

HANGING SYSTEMSEquipment, Gripple........................ 28

HARDCASTBrushes, Duct Sealant ................... 38Sealants, Duct .............................. 38Tape, Gypsum.............................. 39

HEATERSCeiling, Markel.............................. 35

HOT WATERCoils, Price .................................. 10

HVACStarters, Cerus Industrial ................ 33

IISOLATOR KITS

Hanging, Loren Cook ..................... 31

T

Index

iii

ISOLATORSVibration, Loren Cook .....................31

J

JER-AIRDampers, Round ...........................18Reducers, Short ............................18Takeoffs ......................................17Takeoffs, Rectangular to Round........17Takeoffs, Stick-On .........................18Transitions, Duct ...........................19

K

KEESDiffusers, Linear ............................. 6

LLAY-IN

Ceiling Diffusers, Price..................... 3Mounting Frames, Price ................... 9

LINE VOLTAGEThermostats, Markel.......................35

LINEARDiffusers, Kees............................... 6Diffusers, Price............................... 6

LINKSFuse ...........................................23

LOREN COOKCaps, Wall ...................................31Controls, Fan Speed ......................31Dampers, Backdraft .......................31Dampers, Radiation .......................31Fans, Ceiling ................................29Isolator Kits, Hanging .....................31Isolators, Vibration .........................31Switches, Time Delay .....................31Transitions for Exhaust Fans ..............29Ventilators, Exhaust .......................30Ventilators, Gravity.........................31

LOUVERSStationary, Ruskin..........................22

M

MAGNETICNut Setters, Evco...........................39

MANUALCable Tie Tools, Panduit .................37

MARKELHeaters, Ceiling.............................35Switches, Power Disconnect ............35Thermostats, Line Voltage ...............35Unit Heaters, Suspended ................34Wall Heaters, Fan Forced................35

MIDWEST SNIPSSnips, Aviation ..............................38

MIRO INDUSTRIESSupports, Pipe ..............................36

MOTORIZEDDampers, Young Regulator..............20

MOUNTING FRAMESLay-In, Price .................................. 9

N

NELCOStraps, Duct .................................37

NUT SETTERSMagnetic, Evco .............................39

O

OPPOSED-BLADEDampers, Price ....................... 3, 5, 9

P

PANDUITCable Tie Tools, Manual .................37

PANELSAccess, Thomas Enterprises...... 24–25

PERFORATEDCeiling Panels, Price ....................... 2Return Strips, Raymon-Donco ........... 6

PIPEBoots, Portals Plus.........................37Clamps, Portals Plus ......................37Routers, Portals Plus......................37

PIPE CONTINUEDSnaplock, Crown Products...............13Snaplock, Royal Metal Products .......13Supports, Miro Industries.................36

PLASTER FRAMES FOR LINEAR DIFFUSERS

Price ............................................ 6

PLENUMSDistribution, Price ........................... 6

PNEUMATICControls, Price ..............................10

PORTALS PLUSBoots, Pipe...................................37Clamps, Pipe ................................37Flashings, Roof .............................36Routers, Pipe................................37

POWER DISCONNECTSwitches, Markel ...........................35

PRESSEDElbows, Eastern Sheet Metal ...........26End Caps, Eastern Sheet Metal ........28Reducers, Eastern Sheet Metal ........26Taps, Eastern Sheet Metal ..............27Tees, Eastern Sheet Metal ..............27

PRICEBaffles, Sectorizing ......................... 9Ceiling Diffusers, Architectural........... 4Ceiling Diffusers, Lay-In ................... 3Ceiling Diffusers, Slotted .................. 5Ceiling Panels, Perforated ................ 2Coils, Hot Water ............................10Controls, Pneumatic .......................10Core for Ceiling Diffuser ................... 5Dampers, Opposed-Blade .........3, 5, 9Dampers, Sliding-Blade ................... 3Diffusers, Ceiling .........................1–4Diffusers, Linear ............................. 6Diffusers, Slotted ............................ 6Grilles, Door .................................. 5Grilles, Return........................... 8, 10Grilles, Supply.............................7–8Mounting Frames, Lay-In.................. 9Plaster Frames for Linear Diffusers .... 6Plenums, Distribution....................... 6Return Grilles, Eggcrate ................... 9Return Grilles, Filter ........................ 8Terminals, VAV .............................. 9Touch Up Paint ............................ 39

Q

QUADRANTRegulators, AES Industries ..............36

Transitions, Duct ...........................19

iv

IndexR

RADIATIONDampers, Loren Cook .................... 31

RAYMON-DONCOReturn Strips, Perforated ..................6

RECTANGULAR TO ROUNDTakeoffs, Crown Products ............... 17Takeoffs, Jer-Air ........................... 17

REDUCERSConical, Crown Products ................ 16Fabricated, Eastern Sheet Metal ...... 27Pressed, Eastern Sheet Metal ......... 26Short, Jer-Air................................ 18Snaplock, Royal Metal Products ....... 14

REFLECTIX, INC.Spacers, Duct Wrap ...................... 12Wrap, Duct .................................. 12

REGULATORSQuadrant, AES Industries ............... 36

REMOTE CABLEControls, Young Regulator .............. 20

RETURNGrilles, Airvector ........................... 10Grilles, Price .............................8, 10

RETURN GRILLESEggcrate, Price ...............................9Filter, Price ....................................8

RETURN STRIPSPerforated, Raymon-Donco ...............6

ROOFCaps, Broan................................. 32Curbs, Curbs Plus ......................... 34Flashings, Portals Plus ................... 36

ROUNDDampers, Jer-Air........................... 18

ROUTERSPipe, Portals Plus.......................... 37

ROYAL METAL PRODUCTSCaps, Snap ................................. 14Collars, Tab ................................. 14Elbows, Adjustable ........................ 13Hanging Straps, Duct ..................... 14Pipe, Snaplock ............................. 13Reducers, Snaplock ...................... 14Taps, Saddle................................ 17Tees, Snaplock............................. 14Wyes, Snaplock ............................ 14

RUSKINAccess Doors, Duct ..................23–24

RUSKIN CONTINUEDDampers, Fire .........................21–22Fire Damper Accessories................ 22Fuse Lines .................................. 23

S

SADDLETaps, Royal Metal Products ............ 17

SCREWSDrill Point, Evco ............................ 39Taper Point, Evco ......................... 39

SEALANTSDuct, Hardcast ............................. 38Firestop, TVM Building Products ...... 39

SECTORIZINGBaffles, Price..................................9

SELKIRKDiffusers, Ceiling........................... 11

SHORTReducers, Jer-Air .......................... 18

SLIDING-BLADEDampers, Price...............................3

SLOTTEDCeiling Diffusers, Price .....................5Diffusers, Price ...............................6

SNAPLOCKPipe, Crown Products .................... 13Pipe, Royal Metal Products ............. 13Reducers, Royal Metal Products ...... 14Tee Caps, Royal Metal Products ...... 15Tees, Royal Metal Products ............ 14Wyes, Royal Metal Products............ 14

SNIPSAviation, Midwest Snips.................. 38

SOCKETWrenches, Young Regulator............ 20

SPACERSDuct Wrap, Reflectix, Inc. ............... 12

SPIN-INCollars, Crown Products ................. 15Collars, Flexmaster USA ................ 16

SPIRALDuct, Eastern Sheet Metal .............. 26

SPIRAL DUCTCouplings, Eastern Sheet Metal ....... 28

STARTERSHVAC, Cerus Industrial .................. 33

STARTINGCollars, Crown Products ................. 14

STATIONARYLouvers, Ruskin ............................ 22

STICK-ONTakeoffs, Jer-Air ........................... 18

STRAPSDuct, Nelco .................................. 37

SUNVENT INDUSTRIESVents, Brick ................................. 22

SUPPLYGrilles, Price .............................. 7–8

SUPPORTSEquipment, Curbs Plus................... 34Pipe, Miro Industries ...................... 36

SUSPENDEDUnit Heaters, Markel ...................... 34

SWITCHESPower Disconnect, Markel .............. 35Time Delay, Loren Cook ................. 31

TTAB

Collars, Royal Metal Products .......... 14

TAKEOFFSBellmouth, Eastern Sheet Metal ....... 28Conical, Crown Products ................ 16Conical, Eastern Sheet Metal .......... 28Jer-Air......................................... 17Rectangular to Round, Crown

Products ...................... 17Rectangular to Round, Jer-Air.......... 17Stick-On, Jer-Air ........................... 18

TAPEAluminum Foil, Tyco Adhesives ....... 39Duct, Tyco Adhesives .................... 39FSK, Tyco Adhesives..................... 39Gypsum, Hardcast......................... 39

TAPER POINTScrews, Evco ............................... 39

TAPSConical, Eastern Sheet Metal .......... 27Pressed, Eastern Sheet Metal ......... 27Saddle, Royal Metal Products .......... 17

TEERoyal Metal Products ............ 14

TEESConical, Eastern Sheet Metal .......... 27Pressed, Eastern Sheet Metal ......... 27Snaplock, Royal Metal Products ....... 14

T

Louvers, Stationary ....................... 22

Index

v

TERMINALSVAV, Price .................................... 9

THERMAFLEXDuct, Flexible................................12

THERMOSTATSLine Voltage, Markel.......................35

THOMAS ENTERPRISESPanels, Access ....................... 24–25

TIME DELAYSwitches, Loren Cook.....................31

TRANSITIONSBroan ..........................................32Duct, Crown Products.....................19Duct, Jer-Air .................................19Duct, Price ...................................19Loren Cook .........................................29

TVM BUILDING PRODUCTSSealants, Firestop..........................39

TYCO ADHESIVESTape, Aluminum Foil ......................39Tape, Duct ...................................39Tape, FSK....................................39

U

UNIT HEATERSSuspended, Markel ........................34

VVAV

Diffusers, Acutherm........................10Terminals, Price ............................. 9

VENTILATORSExhaust, Loren Cook ......................30Gravity, Loren Cook .......................31

VENTSBrick, Sunvent Industries.................22

VIBRATIONIsolators, Loren Cook .....................31

VOLUME CONTROLDampers, AES Industries ................20

WWALL

Caps, Broan .................................32Caps, Loren Cook..........................31

WALL HEATERSFan Forced, Markel ........................35

WRAPDuct............................................12Duct, Reflectix, Inc. ........................12

WRENCHESSocket, Young Regulator.................20

WYESSnaplock, Royal Metal Products .......14

Y

YOUNG REGULATORCasing & Wire...............................20Controls, Remote Cable ..................20Dampers, Motorized .......................20Wrenches, Socket..........................20

vi

General Policies

General Policies GENERAL POLICIES

NEW ACCOUNTSTom Barrow Co. is happy to offer many ways to purchase materials. We can process a properly signed and completedcredit application which will allow you to purchase with terms. While the application is being reviewed or if you elect notto apply for terms, you may purchase on a COD basis.

PRODUCT AVAILABILITYTom Barrow Co. offers an extensive array of products at all our warehouses, however, we can not guarantee that we willhave every product in the quantity you need at all times. We will make every effort to fill your order using all of ourresources. Products within our catalog may change without notice, so please call your local branch for most currentavailability.

SPECIAL ORDERSCancellation of these items depends on timing and manufacturers’ policies. Special order items may not be returned.

PRICINGTom Barrow Co. offers competitive pricing, but due to the fluctuating material markets, we may change our pricing with-out giving prior notification. Special quotations may be given for a specific quantity, for a specific period of time. Pricesdo not include any present or future sales, use, excise, value added or similar tax. Where applicable, all such taxes shallbe paid by the Customer. Customer must furnish evidence of exemption, if applicable.

DELIVERYAll materials delivered must be examined and inspected by the purchaser and/or his representative upon receipt. For allmaterials examined and inspected, any claim of shortage and/or damage must be made at time of delivery. Where pur-chaser and/or his representative can not examine and inspect material upon receipt, any and all claims must be madewithin three (3) working days of delivery. Any claims made after the prescribed time period shall not be honored.

COMMON CARRIER CLAIMSTom Barrow Co. is not liable for any loss or damage in-transit by the carrier. Damage or shortages must be noted uponreceipt and be countersigned by the carrier's agent. Tom Barrow Co. will provide reasonable information for the buyer toestablish a Customer's claim against the carrier. Any claim must be made before any part of the material has been changed from its original condition.

RETURN GOODSMaterial may be returned with prior authorization from Tom Barrow Co. Tom Barrow Co. will only accept material forcredit that is currently stocked, in as sold condition and packaging within 30 days from the original purchase date. Creditwill be issued after inspection of material. All unauthorized returns will be denied a credit. Items that are ordered to yourspecification cannot be returned. Returns other than defective material or shipping error, will be subject to a minimum20% restocking charge. All returns are for material credit only and must be shipped "Freight Prepaid" if shipped via com-mon carrier.

TAXESUnless otherwise noted, prices do not include any present or future sales, use, excise value added or similar tax. Whereapplicable, all such taxes shall be paid by the Customer. Customer must furnish evidence of exemption, if applicable.

T

Notes

vii

NotesNotes

viii

Notes

Notes

T

Tom Barrow founded his namesake company in 1955 as a manufacturer’s representative for commercial HVAC products. Starting with only a few product lines, he quickly earned a reputation for service and integrity. He had one guiding principal -

“The VALUE we add to the products we sell is SERVICE.” – Tom Barrow, Founder

As the business grew, the company added more products, as well as sales and support staff.

For the next 25 years, the company primarily offered products on the air side of HVAC systems. That changed in 1997, when Tom Barrow Company began representing applied equipment products, including custom air handling units, custom packaged equipment, and a variety of specialty products and components.

Today, the company’s experienced sales team works closely with mechanical engineers, building owners, and contractors in the selection and application of a wide range of products. And, with

commercial HVAC manufacturer’s representative in the Southeast.

A lot has changed since 1955. But after 60+ years in business, Tom Barrow Company is still living its founder’s guiding principal and continues to add value through integrity, experience and most importantly, service.

Our founder, Tom Barrow

©Tom Barrow Company, 2018

[email protected] Plant Atkinson Road, Atlanta, GA 30339(404) 351-1010 (800) 229-8226 Fx (404) 350-9121

FT. [email protected] Elevation Way, Suite C, Ft. Myers, FL 33905(239) 278-1988 (888) 207-3113 Fx (239) 278-5884

[email protected] Highway Ave, Suite I, Jacksonville, FL 32254(904) 399-4133 (800) 883-4133 Fx (904) 399-5750

[email protected] Appling Way, Suite 102, Memphis, TN 38133(901) 367-1180 (800) 229-1881 Fx (901) 367-1350

[email protected] Kraft Drive, Nashville, TN 37204(615) 244-4800 (800) 883-4800 Fx (615) 244-4816

[email protected] West New Hampshire Street, Orlando, FL 32804(407) 291-0961 (800) 883-0961 Fx (407) 295-8849

[email protected] West Romana Street, Pensacola, FL 32502 (850) 432-4076 Fx (850) 469-4304

[email protected] Ogeechee Road, Suite 127, Savannah, GA 31405(912) 356-1721 (800) 251-7576 Fx (912) 356-3082

[email protected] Benjamin Road, Suite 106 Tampa, FL 33634 (813) 888-9000 (800) 229-6850 Fx (813) 882-0130

[email protected] Crosshaven Lane, Vestavia Hills, AL 35243(205) 967-8943 Fx (205) 967-8946

ceiling diffusers - tom barrow company

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