natural ventilation for schools , commercial & industrial ... · natural stack ventilation (for...
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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.
SPECIALISTVENTILATIONSERVICES Ltd
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.
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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.
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
Roof
Covering.
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.
SPECIALISTVENTILATIONSERVICES Ltd
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.
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“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.
SPECIALISTVENTILATIONSERVICES Ltd
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.
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WindVent / HPBT Installation Details & helpful information.
150mmminimumheight for
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.
SPECIALISTVENTILATIONSERVICES Ltd
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
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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
We reserve the right to implement design changes without prior notification.
SPECIALISTVENTILATIONSERVICES Ltd
150mmminimumheight for
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.
SPECIALISTVENTILATIONSERVICES Ltd
120mm
Section A - AFixing
Upstand / Curb.
Typical Installation method without the Water Shed Frame
HPBT Blade profile giving approximately 50% Free Area.
7
).
SPECIALISTVENTILATIONSERVICES Ltd
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