vince cord poly-tech environmental inc. 805-306-0354 vincecord@sbcglobal

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4/11/09 4/11/09 Sustainable Bulding Sustainable Bulding Advisor Advisor 1 Vince Cord Vince Cord Poly-Tech Environmental Inc. Poly-Tech Environmental Inc. 805-306-0354 805-306-0354 [email protected] [email protected]

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Vince Cord Poly-Tech Environmental Inc. 805-306-0354 [email protected]. Eight Considerations for a Green and Healthy HVAC System 1.Energy efficient design 2. Safe materials 3.Duct and equipment sealing 4.Air filtration 5.Outside air (central ventilation) 6.Adequate returns - PowerPoint PPT Presentation

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Page 1: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 11

Vince Cord Vince Cord

Poly-Tech Environmental Inc.Poly-Tech Environmental Inc.

805-306-0354805-306-0354

[email protected]@sbcglobal.net

Page 2: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 22

Eight Considerations for a Green Eight Considerations for a Green and Healthy HVAC Systemand Healthy HVAC System

1.Energy efficient design 1.Energy efficient design

2. Safe materials2. Safe materials

3.Duct and equipment sealing 3.Duct and equipment sealing

4.Air filtration4.Air filtration

5.Outside air (central ventilation)5.Outside air (central ventilation)

6.Adequate returns6.Adequate returns

7.Cleanliness7.Cleanliness

8.Fiberglass insulation in the air 8.Fiberglass insulation in the air streamstream

Page 3: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 33

1. Energy Efficient System Design1. Energy Efficient System Design

Page 4: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 44

Attic Split SystemAttic Split System

Page 5: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 55

Basement Split SystemBasement Split System

Page 6: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 66

For proper operation and maximum For proper operation and maximum energy efficiency, residential systems energy efficiency, residential systems should be designed according to the should be designed according to the highest industry standards:highest industry standards:

Manual J, Residential Load Manual J, Residential Load Calculation.Calculation.

Manual D, Residential Duct Systems.Manual D, Residential Duct Systems. Manual J and D are written by ACCA Manual J and D are written by ACCA

(Air Conditioning Contractors of (Air Conditioning Contractors of America) www.ACCA.orgAmerica) www.ACCA.org

Page 7: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 77

2.Non-Toxic Materials2.Non-Toxic Materials

All materials and equipment used in this All materials and equipment used in this presentation have been independently presentation have been independently

tested to contain no toxic substances. If you tested to contain no toxic substances. If you choose to use other materials you will be choose to use other materials you will be

risking the introduction of unhealthy risking the introduction of unhealthy chemicals/substances into the living space. chemicals/substances into the living space.

Page 8: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 88

Safe duct sealants: Dow Corning 999A clear; (Safe duct sealants: Dow Corning 999A clear; (www.dowcorning.com) ) Design Polymerics; DP1010; DP1020Design Polymerics; DP1010; DP1020 (www.designpoly.com)(www.designpoly.com)

Page 9: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 99

Reflective Insulation (a.k.a. bubble wrap) or foil faced FSK Reflective Insulation (a.k.a. bubble wrap) or foil faced FSK duct wrap, to keep fiberglass particles contained. Available duct wrap, to keep fiberglass particles contained. Available

at local HVAC supplier.at local HVAC supplier.

Page 10: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

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3.3. Duct and Equipment Sealing.Duct and Equipment Sealing.

Every visible seam and joint must be meticulously Every visible seam and joint must be meticulously sealed in order to ensure a tight duct system. sealed in order to ensure a tight duct system.

Follow all CEC title 24 guidelines, even if the project Follow all CEC title 24 guidelines, even if the project is in an exempt costal area (is in an exempt costal area (www.energy.ca.gov).).

Seal your system to leak less than 5% of rated Seal your system to leak less than 5% of rated system air flow. Includes new and existing buildings. system air flow. Includes new and existing buildings.

Have your fully assembled system (including heating Have your fully assembled system (including heating and cooling equipment) tested by a qualified duct and cooling equipment) tested by a qualified duct tester (aka cheers rater). See tester (aka cheers rater). See www.Cheers.org for a for a list of raters in your arealist of raters in your area..

Page 11: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 1111

Avoid open return-air passagesAvoid open return-air passages

Page 12: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 1212

Open return, properly sealedOpen return, properly sealed

Page 13: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 1313

Seal all penetrations into air- Seal all penetrations into air- handling equipmenthandling equipment

Page 14: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 1414

Seal all electrical penetrations into Seal all electrical penetrations into air-handling equipmentair-handling equipment

Page 15: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 1515

Typical leaks around start-collar Typical leaks around start-collar Notice light from other sideNotice light from other side

Page 16: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 1616

Properly sealed start-collarProperly sealed start-collar

Page 17: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 1717

Properly sealed register boot in ceiling. This is one of the Properly sealed register boot in ceiling. This is one of the

worst areas of leakage on just about every system.worst areas of leakage on just about every system.

Page 18: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 1818

Properly taped furnace blower Properly taped furnace blower access door, tape access door, tape all fourall four sides sides

Page 19: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 1919

Dirty blower compartment from Dirty blower compartment from leaks, filter bypass, and poor filterleaks, filter bypass, and poor filter

Page 20: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 2020

4. Air Filtration4. Air Filtration An often overlooked no-brainer.An often overlooked no-brainer. Filter efficiencies are rated by MERV rating. Filter efficiencies are rated by MERV rating.

Filter efficiencies range from 1-20 See Filter efficiencies range from 1-20 See www.nafahq.org/LibaryFiles/Articles/Article006.htm..

If no MERV rating is given, it’s probably very If no MERV rating is given, it’s probably very low. low.

Use MERV 11 or better for primary air filtration. Use MERV 11 or better for primary air filtration. Upgrade by installing an additional HEPA and Upgrade by installing an additional HEPA and

Carbon bypass type air purifier. Carbon bypass type air purifier. www.pureairsystems.comwww.pureairsystems.com

Page 21: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 2121

Dirty air conditioning cooling coilDirty air conditioning cooling coil

Page 22: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 2222

The best filter is not much good if it The best filter is not much good if it doesn’t fit snugly into the equipmentdoesn’t fit snugly into the equipment

Page 23: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 2323

All factory filter retainers fall shortAll factory filter retainers fall short

Page 24: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 2424

Popular filter with fiberglass Popular filter with fiberglass and air bypassand air bypass

Page 25: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 2525

Seal filter channel to duct to prevent Seal filter channel to duct to prevent air bypass between channel and duct.air bypass between channel and duct.

Page 26: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 2626

Install Gasket in filter channel Use standard 3/8” wide x 5/16” thick foam

weather stripping; available at hardware stores

Page 27: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 2727

4” thick, MERV 11 PowerGuard, non-4” thick, MERV 11 PowerGuard, non-fiberglass filter media(www.airguard.com)fiberglass filter media(www.airguard.com)

Page 28: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 2828

Ultra Violet LightsUltra Violet Lights Ultra Violet lights that bathe the coiling coil in UV Ultra Violet lights that bathe the coiling coil in UV

light are effective in preventing microbial on wet light are effective in preventing microbial on wet cooling coils. cooling coils.

UV light in the return air stream are minimally UV light in the return air stream are minimally effective in killing air-borne bacteria and viruses, effective in killing air-borne bacteria and viruses, and may not be worth the cost.and may not be worth the cost.

Choose a UV light that does not emit ozone. Choose a UV light that does not emit ozone. Manufacturers will tell you that theirs do not emit Manufacturers will tell you that theirs do not emit ozone. Our research show that Honeywell and ozone. Our research show that Honeywell and Second Wind coil irradiation lights do not emit Second Wind coil irradiation lights do not emit ozone.ozone.

Page 29: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 2929

Filters should be taped into Filters should be taped into housing to eliminate leakagehousing to eliminate leakage

Page 30: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 3030

After I year, with good filter system, After I year, with good filter system, sealed return duct and air-handlersealed return duct and air-handler

Page 31: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

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Dirty blower compartmentDirty blower compartment

Page 32: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 3232

5. Outside Air5. Outside Air

Choose clean area away from crawl space or Choose clean area away from crawl space or attic vents, dog runs, trash cans, dryer vents, attic vents, dog runs, trash cans, dryer vents, plumbing vents, etc.plumbing vents, etc.

Intake should be 4’ above hardscape or 8’ Intake should be 4’ above hardscape or 8’ above soil.above soil.

Avoid roof top air intakes because of VOC’s Avoid roof top air intakes because of VOC’s from roofing materials. If unavoidable intake from roofing materials. If unavoidable intake should be at least 5’ away from roof surface.should be at least 5’ away from roof surface.

Page 33: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

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Attic split systemAttic split system

Page 34: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 3434

Intake from crawl above hardscapeIntake from crawl above hardscape

Page 35: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 3535

Intake from crawl above soilIntake from crawl above soil

Page 36: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

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Side wall intakeSide wall intake

Page 37: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

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6. Adequate Returns6. Adequate Returns

Any room with a door that will ever Any room with a door that will ever be closed, such as bedrooms, be closed, such as bedrooms, offices, etc. (except bathrooms) offices, etc. (except bathrooms) must have a return duct to prevent must have a return duct to prevent undesirable negative pressure in the undesirable negative pressure in the house.house.

Page 38: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 3838

Attic split systemAttic split system

Page 39: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 3939

Dirty carpet at base of walls Indicates Dirty carpet at base of walls Indicates air passing through gapsair passing through gaps

Page 40: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 4040

Well placed return-grilles, outside air intake and a tight duct system, will ensure that the house will have a slight positive

pressure. Use an Energy Recovery Ventilator in colder climates, where neutral pressure is best.

Page 41: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 4141

7.Cleanliness7.CleanlinessInstall clean materials.Install clean materials.

Dirty ducting and Dirty ducting and equipment contributes equipment contributes to poor air quality and to poor air quality and reduces energy efficiency.reduces energy efficiency.

Page 42: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 4242

Typical dirty ductTypical dirty duct

Page 43: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 4343

Typical leaky, return-platformTypical leaky, return-platform

Page 44: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 4444

Cover open ducts during Cover open ducts during construction to keep debris outconstruction to keep debris out

Page 45: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 4545

Keep open ducts closed during Keep open ducts closed during installationinstallation

Page 46: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 4646

Keep open ducts closed during Keep open ducts closed during installationinstallation

Page 47: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 4747

Duct cleaning that worksDuct cleaning that works

Ducts get dirty because air filtration is poor and return-air Ducts get dirty because air filtration is poor and return-air ducts leak.ducts leak.

Seal all leaks in the return side of the system, including Seal all leaks in the return side of the system, including the air handling equipment.the air handling equipment.

Install a filter system with a minim um MERV 11 rating. Install a filter system with a minim um MERV 11 rating. Ensure that it will not allow dirt to bypass the filter. Ensure that it will not allow dirt to bypass the filter.

A powerful dual motor HEPA filtered vacuum is A powerful dual motor HEPA filtered vacuum is connected to the main duct or plenum.connected to the main duct or plenum.

Rotation brushes on 25’ long cables are run through the Rotation brushes on 25’ long cables are run through the ducts, by inserting it in each register boot, while others ducts, by inserting it in each register boot, while others are blocked to create maximum air flow through that are blocked to create maximum air flow through that duct. duct.

Follow-up with compressed air is helpful, especially on Follow-up with compressed air is helpful, especially on very dirty systems.very dirty systems.

Page 48: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 4848

Some hand vacuuming with HEPA filtered vacuums is Some hand vacuuming with HEPA filtered vacuums is always needed.always needed.

Wash all registers and grilles before reinstalling.Wash all registers and grilles before reinstalling. Remove and disassemble the blower assembly for Remove and disassemble the blower assembly for

thorough cleaning. thorough cleaning. Wash the cooling-coil and drain pan with commercial, Wash the cooling-coil and drain pan with commercial,

evaporator coil cleaner. To keep VOC”S from the evaporator coil cleaner. To keep VOC”S from the detergent out of the building, rinse thoroughly (even if detergent out of the building, rinse thoroughly (even if product instructions say “no rinse”) product instructions say “no rinse”)

Be sure to tape the filter media in place and tape the Be sure to tape the filter media in place and tape the blower door closed to minimize the introduction of blower door closed to minimize the introduction of unfiltered air. unfiltered air.

One manufacturer of this equipment is Nikro. (nikro.com).One manufacturer of this equipment is Nikro. (nikro.com). Air Duct Cleaning Company 800-358-3828Air Duct Cleaning Company 800-358-3828

Page 49: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 4949

8. Eliminate fiberglass 8. Eliminate fiberglass insulation in the air streaminsulation in the air stream..

Page 50: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 5050

Typical gas/electric basement Typical gas/electric basement split systemsplit system

Page 51: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 5151

Fiberglass warning on typical Fiberglass warning on typical coil-casingcoil-casing

Page 52: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 5252

Example of exposed fiberglass Example of exposed fiberglass Note degradationNote degradation

Page 53: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 5353

Typical roof duct linerTypical roof duct liner

Page 54: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 5454

For new roof top ducting, use typical For new roof top ducting, use typical round insulated metal duct. Insert metal round insulated metal duct. Insert metal liner in straight sections and encapsulate liner in straight sections and encapsulate the fiberglass in the elbows, y’s etc. with the fiberglass in the elbows, y’s etc. with DP1010 or DP 2510 (DP1010 or DP 2510 (www.designpoly.com))

Existing roof top ducting may be Existing roof top ducting may be modified to encapsulate the fiberglass modified to encapsulate the fiberglass liner.liner.

Page 55: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 5555

Encapsulation of fiberglass on existing roof Encapsulation of fiberglass on existing roof ducting using reflective insulation (aka bubble ducting using reflective insulation (aka bubble

wrap), available at local HVAC distributors.wrap), available at local HVAC distributors.

Page 56: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 5656

Choose HVAC units and cooling coils with Choose HVAC units and cooling coils with foil-faced insulation (recommend foil-faced insulation (recommend

American Standard or Trane)American Standard or Trane)

Page 57: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 5757

Sealed edges of foil-faced Sealed edges of foil-faced insulation in a furnaceinsulation in a furnace

Page 58: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 5858

Most new furnaces have Most new furnaces have fiberglass in furnace blower-fiberglass in furnace blower-

compartmentcompartment

Page 59: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 5959

Blower-compartment Blower-compartment fiberglass encapsulatedfiberglass encapsulated

Page 60: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 6060

Avoid acoustic flex ductAvoid acoustic flex duct

Page 61: Vince Cord  Poly-Tech Environmental Inc. 805-306-0354 vincecord@sbcglobal

4/11/094/11/09 Sustainable Bulding Advisor Sustainable Bulding Advisor 6161

Mylar-lined flex duct (recommend ATCO, Mylar-lined flex duct (recommend ATCO, Model #036 or 031; atcoflex.com)Model #036 or 031; atcoflex.com)