natural ventilation for schools , commercial & industrial ... · natural stack ventilation (for...

SPECIALISTVENTILATIONSERVICES Ltd

Natural Ventilation for Schools, Commercial & Industrial Buildings.

Specia l i s t Vent i la t ion Serv ices Ltd. INNOVATIVE AIR CONTROL

Our High Performance Baffle Terminal has been independently tested and proven

to achieve Class A Rain Rejection in accordance with BS EN 13030:2001

High Performance Baffle Terminal Square / Rectangular, Type HPBT.

ActiveHeight (H)

Duct Width (W)

External Width = W + 225 mm

Duct Length (L)

External Length =L+225 mm

40mm

40mm

50mm

Duct Size(mm)3004506007509001050120013501500165018001950

Inside Facesize (mm)3354856357859351085123513851535168518351985

Overall CurbSize (mm)50065080095011001250140015501700185020002150

External OverallSize (mm)52567582597511251275142515751725187520252175

Clear OpeningSize (mm)2854355857358851035118513351485163517851935

Larger dimensions are possible and increase in 150mm increments as standard.Any dimension can be achieved by altering the pitch of the baffles to suit.

STANDARD DIMENSIONS:

150mmminimumheight for

snow.

Clear Opening size(Duct size - 15 mm)

Inside Face Dimension(Duct size + 35 mm)

External Overall Dimension(Duct size + 225 mm).

100

RoofCovering.

Level Timber Upstand(by Builder).

10mm minoverhang.

Overall Curb Dimension(Duct size + 200 mm).

Duct size(or Roof opening size)

We reserve the right to implement design changes without prior notification.


HPBT Blade Configuration

ROOF OPTIONS:Mono Pitch, Apex or Pyramid.Extended overhang features.Gutters and drainage.

CONSTRUCTION: Blades and frames are high quality extrudedaluminium sections with welded corners.The roof is manufactured from 2 or 3mm aluminiumsheet depending on the roof span and is pressedor formed to suit.Galvanised Steel Bird Mesh is fitted as standard.

DIMENSIONS:Minimum internal face size, 335x335mmMaximum Size, unlimited. Large sizes can be builtin modular sections for ease of installation.

OPTIONS & ACCESSORIES:Internal insulated dividers for use in "Windvent"applications.Insulated Shut off Dampers for user control,these can be manual or motorised.Integrated access doors for maintenance ofdampers and actuators if access from the roofis required.

FINISH:Polyester Powder Coated to any BS or RAL Colour.

PERFORMANCE:The "WindVent" system has been specificallydesigned for use in Natural Ventilation Systemswhere performance and weatherability isparamount. The high performance baffle typeblade arrangement was developed to minimisethe free pass of strong wind driven rain andsnow entering the building which has been afailing of more standard type louvre systems inthis application.Due to the unique blade design there is no lineof sight between the blades and as a result theair bourne moisture particles are forced tochange direction several times coming intocontact with the surface of the blades, which inturn drains to the the bottom frame.This bottom frame has an integral upstand setbehind the vertical blades which helps to shedthe water onto the roof or wall.

2

High Performance Baffle Terminal Circular, Type C-HPBT.

ActiveHeight (H)

40mm

40mm

External Overall Dia

Clear Internal Dia

Duct Size(mm Dia)450600750900105012001350150016501800

Inside Face(mm Dia)485635785935108512351385153516851835

Overall Curb(mm Dia)6508009501100125014001550170018502000

External OverallSize (mm Dia)6758259751125127514251575172518752025

Clear Opening(mm Dia)435585735885103511851335148516351785

DIMENSIONS:Minimum internal face size, 450mm DiaMaximum Size, unlimited. Large sizes can be builtin modular sections for ease of installation.


snow.

Clear Opening size(Duct size - 15 mm)

Inside Face Dimension(Duct size + 35 mm)

External Overall Dimension(Duct size + 225 mm).

100

Roof

Covering.

Level Timber Upstand(by Builder).

10mm minoverhang.

Overall Curb Dimension(Duct size + 200 mm).

Duct size(or Roof opening size)



Natural Ventilation system combined with Natural light facility. Type NVL

Natural Ventilation Dome. DEFRA. HQ (York)

1700mm

3400mm

.

2200 Dia

SectionShown below

Dome joint.

150

M

1500mm

50mm

Note; Orientation of damper blades are for illustrationpurposes only. They are actually VERTICAL.

1 2 3

4 5

6

78

Builder's Upstand

1) WL75/100 External Weather Louvre.2) 6 No Insulated Dampers, one on each side. 3) WL50 Internal Louvre on all sides.4) Double skin Insulated roof panel.5) 100mm Upstand to support Dome, internal dimension 2100mm.6) Double Skin Clear Polycorbonate Dome (2100mm Dia internal).7) Insulated Access panel for actuator, full width of louvre.8) 240v Motor Open / Close Actuator. Other options are available.

3

“WindVent” Type WV-HPBT. Natural Supply & Extract System.

Model HPBTc/w divders.

Insulated Duct sectionto connect Windvent tothe Damper throughthe Builders upstand.

Motorised InsulatedShut off Damper

Insulated Duct Sectionc/w Insulated Dividersand Air DistributionGrilles.

Natural Stack Ventilation (for extract air) has been around and used successfully for many years, however with the development of technology and a wider understanding of the benefits of wind powered systems we can now provide better controlled supply air ventilation in a similar way. By harnessing the wind pressure we can force fresh air into a building and when coupled with the natural buoyancy of the warm air developed internally within we can combine the two to provide a virtually “free to run” ventilation system. The obvious benefits are energy and maintenance reductions due to the omission of fans in the system. If however a boost in ventilation is required in say, a still warm day, a fan can be incorporated at design stage to satisfy this with the knowledge that its use will be periodic and thus saving energy for the majority of the year. Various control options are available from manual hand operation via “Teleflex” cables (or similar) through to fully integrated BMS controlled systems including the likes of C0² and temperature detection with links to smoke and fire alarm activation be it fail safe closed or open depending on the clients requirements. We reserve the right to implement design changes without prior notification.


Roof.

InsulatedDivider.

MotorisedInsulatedDamper.

ActiveHeight

Overall Width

Wind

Direction

Wind PoweredSupply Air.

NaturalExtract Air.

Ceiling

Ceiling Void.

ROOM.

Plan View of Air Distributionwithin the room.

As can be seen in the diagram above, the wind helps to drive or push the fresh air through the roof mounted baffle terminal which incorporates a series of insulated dividers forcing the air down through the open damper into the air distribution plenum prior to being delivered horizontally into room being served. This horizontal distribution minimises the risk of draughts unlike most other systems that have an open grille on the bottom for the air to pass through. Due to the positive pressure of the wind on what is known as the “Windward” side, only half of the roof terminal can be used for fresh air supply as the opposite side known as the “Leeward” side is under negative pressure which enhances any natural extract that may occur from the “stack effect” helping to provide a balanced supply and extract system.

4

WindVent / HPBT Installation Details & helpful information.


snow.

75mm

Windvent Louvre

Roof Sleeve

Roof Curb Detail

Captive Nut (M8)

Captive Nut (M8)

DamperHeightTBC

Grille Plenum

Roof Sleeve

Soft Gasket between Flanges

Soft Gasket between flanges

50mm

25mm

Self Tapping Screw

Type 49-281 Linear Grille.(3mm Blades on 13mm Ctrs)15 Deflection Up.

Grille Plenum

Plenum cutout for grille

Grille detail & location on plenum. We reserve the right to implement design changes without prior notification.


500mm

Overall Damper size

50mm

Base to be fully sealed / water tightincase of water carryover from Louvres.

Overall Damper size

Air Distribution Plenum

500 mm

Ceiling Void Snow Carryover Tray

Weld Joint.

Drip Angle.

A

A

Roof support channel.

Roof Section Roof Section.

Rain Collection Channel.50 x 15 x 3mm (or similar)

Louvre FrameSection A - A Roof support detail for sectional roofs

5

Other Natural Ventilation Products & Alternative Design Solutions.

External Louvresuitable for wall orwindow systems.

Internal Grille.(Various optionsare available)

InsulatedDamper.

Wall Sleeve.

Wall or Window unit.

M

Attenuator.

InsulatedDamper.

Louvre.

Internal Grille.( If required )

Window.

Wall or Window unit with Attenuator.

Internal Egg-crate grille.

Wall

Typical section ofassembled installation.

Insulated damper c/w24v Spring ReturnActuator. Type 2400




snow.

Clear Opening size.

Inside Face Dimension.

External Overall Dimension.

Level Upstandby Builder.

10mmminimumoverhang.

Overall Curb Dimension.

Duct or curb inside size.

M

18mm Marine Plyto support dampers.

Motorised Damper.

Alternative Damper Location

Overall height

Width

Length

Spigot Dia

100mm

50mm

Base to be fully sealed / water tightincase of water carryover from Louvres.

25mm

Ceiling Void Distribution Plenum.

19mm

35mm

1.2mm thick Matt Blackperforated debris baffle.

Main supporting 35 x 5mmopen floor mesh.

50 x 50 x 5mm (or simmilar)central support channel weldedto 50 x 50 x 5mm x 100mm longangle section.

Packers & fixings(as required)

Floor Terminal for Underground Natural Ventilation.

6

50

Water Shed. Water Shed Frame for Exposed Applications.

Internal View of the Natural Ventilation Dome supplied to DEFRA.

HPBT units supplied to Durham County Council. St John’s Square, Seaham. We reserve the right to implement design changes without prior notification.


120mm

Section A - AFixing

Upstand / Curb.

Typical Installation method without the Water Shed Frame

HPBT Blade profile giving approximately 50% Free Area.

7

).


Special ist Ventilation Design Services.

Specialist Ventilation Services Ltd have been providing Design

assistance and technical support to the Building Services Industry and Mechanical Consulting Engineers since our incorporation in 1998. We have been offering a full design and selection service for our comprehensive range of ventilation products and are proud to represent some of our more specialist suppliers who are the market leaders in their field.

Our main area of expertise is the design & manufacture of bespoke ventilation products and systems to suit our clients specific requirements. We focus on high efficiency products and systems to enable our clients to achieve as minimum an environmental impact as possible using low energy consumption products and innovative system designs.

These can vary from complete turnkey specialist packages, to the supply only of basic products. We aim to offer a service which represents value for money as well as being a high quality technically evaluated solution.

Our factory in County Durham covers the whole of the United Kingdom and Ireland.

Head Office: Specialist Ventilation Services Ltd. Unit 3, Greencroft Industrial Park, Annfield Plain, Stanley, County Durham, DH9 7YB Tel: 01207 529333 Fax: 01207 529444 E-mail: [email protected] Website: www.specialistventilation.com

Special ist Ventilation Products.

Kitchen Ventilation Canopies, Ceilings, Service Spines & Gas Interlocks.

Odour Control systems, UV & Ozone.

Natural Ventilation Wall / Window units and High Performance Roof Terminals.

Fabric Duct systems.

Displacement Ventilation Terminals.

Fire, Smoke & Insulated Dampers.

Smoke and Ventilation Control Panels.

Fire & Smoke activated Transfer Grilles.

Louvre Screens, Grilles & Diffusers.

Stainless Steel ventilation components and accessories.

Prison Grilles, and other Security or Vandal resistant products.

Laboratory Extract Benches, Bench Extract units, Laminar Flow units, HEPA Filter Grilles & Containment Hoods.

Fire Rated Wall, Ceiling, Transfer Grilles & Plenums

natural ventilation for schools , commercial & industrial ... · natural stack ventilation (for...

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