AIRCOOL VENTILATORS

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PASSIVENT LIMITEDNorth Frith Oasts, Ashes Lane, Hadlow, Kent TN11 9QU Tel: 01732 850770 Fax: 01732 850949

Email: projects@passivent.com Web: www.passivent.com

Passivent Limited maintains a policy of continuous development and reserves theright to amend product specifications without notice.

A division of Building Product Design Ltd. Company Registration No: 3944123

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ServicesPassivent has its own in-house researchteam dedicated to developing techniques andproducts for natural ventilation, and hasbeen a leading partner in some of the mostimportant research projects in this fieldincluding NatVent™, a consortium ofEuropean organisations headed by BRE.

We offer a comprehensive design andadvisory service tailored to your specificproject, covering both natural ventilationdesign and product selection. Advancedsoftware based on CIBSE AM10 is used tocalculate sizes of air inlets and outlets toachieve optimum performance.

Names of approved installers can be providedon request.

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CI/SfB (57.7) XyUniclass L7563January 2015

AIRCOOL VENTILATORS

Other productsPassivent market a range of other naturalventilation and daylighting productsincluding:

SoundScoop acoustic transfer ventilationproducts

Airstract and Airscoop roof ventilationterminals

Acoustic passive ventilation

Ventilation control systems

Mixed mode cooling systems

Combined rooflights/ventilators

Sunscoop tubular rooflight systems

Metro modular rooflights

Natural and assisted domestic ventilationsystems

Tricklevent window ventilators

Solar shading

Aircool window ventilator for window/curtain walling viewed from outside

External weather louvre

Controllablemotorised damper

Internal cover grille

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Passivent Aircool is a range of controllableinsulated ventilators primarily forinstallation in external façades incommercial and similar buildings.

The electrically-actuated dampers providecontrolled air intake and extract in naturalventilation systems, and may also be used for air intake or extract in mechanicalventilation systems. They are particularlysuitable for night cooling strategies, wheredaytime heat build-up is dissipated from thestructure during the night, producing lowerinternal air temperatures with a reducedneed for daytime cooling or air conditioning.Natural ventilation methods can save energy,reduce greenhouse gas emissions, andreduce or eliminate the capital and runningcosts of ventilation or air conditioning plant.

Quality assuranceThe systems and processes by which theproduct are manufactured have beenappraised under BS EN ISO 9001 whichcovers design, development, manufacture,and installation (if by approved installers),giving an independently audited andmaintained assurance that the products willmeet their intended purpose.

Sustainability assuranceAll Passivent manufacturing is accredited toISO 14001, the international standard forenvironmental management systems.Passivent are committed to minimising ourimpact on the environment using recycledand recyclable materials where possible.

DESCRIPTION

Composition, manufactureFrame and external weatherlouvres are extruded aluminium,with ABS thermal break.

Internal motorised dampers arefabricated from a double skin ofaluminium with ABS thermalbreak and blade compressionseals; supplied as a completeassembly including the actuator.Removable aluminium actuatorcover for ease of maintenance.Insect screen is 4mm blackpolypropylene. Internal covergrille is fabricated from extrudedaluminium.

SizesMade to order in the size rangesshown below.

Aircool wall ventilators:Heights 255 up to 1490mm; lengths 400 up to 2300mm. Designed to suit brick modulesizes. Wall thickness from 195mmupwards; specify when ordering.

Aircool window/curtain wallventilators:Heights 270 up to 1505mm; lengths 400 up to 2300mm;to suit glazing thickness from 24mm. Depth front to back (including cover grille) 183mm plus glazing thickness.

Please enquire for specific size availability.

AppearanceExternal louvres and frame arepolyester powder coated to order. Internal cover grilles are suppliedin white RAL 9016 as standard butcan be polyester powder coated toother colours to specific order. Internal motorised dampers aremill finish aluminium.

Aircool wall ventilator for masonry wall viewed from inside

External weather louvre

Wall sleeve supplied tolink internal andexternal elements formaximum airtightnessand security

Internal cover grilleControllablemotorised damper

BENEFITS

Contents

Aircool ventilators 2, 3, 4, 5

Hybrid Plus Aircool 6, 7

Thermal Aircool 8

Acoustic Aircool 9

Other applications 10, 11

Further information 12

● Primary construction materials arealuminium and ABS, which are 100%recyclable.

● Electrically-actuated low-voltagedampers provide optimum safety andflexibility, with virtually silentmodulating operation.

● Designed to be installed in masonrywalls, curtain walling, window framesor profiled sheet cladding.

● Insulated internal dampers provide aU-value of 1.1W/m2K when closed, to minimise heat loss.

● Excellent air-tightness performancewhen closed.

● Excellent weather protection andsecurity are provided by the externalweather louvre, even when theinternal insulated louvre is open.

● Thermally broken frame, andinsulated and orientated dampersminimise the risk of nuisancecondensation and draughts.

● Thermal, acoustic and air mixingvariants are available to attenuate ortreat the incoming air in various waysas required by the user (see pages 6, 8 and 9).

● Discreet and functional yetaesthetically pleasing, with internalprotection cover grilles supplied asstandard.

● The internal cover grille protectsagainst impact damage, forapplications such as gymnasiums orsports halls.

● Ventilation design service available.

● Can be supplied in modular form toprovide greater flexibility in use (see page 10).

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AIRCOOL VENTILATORS

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PERFORMANCE

Ventilator performancePassivent can advise on the number andsize of ventilators needed according toair flow volume required (see Services,back cover).

Fire performanceMaterials used for internal frame anddampers when closed achieve a Class 1rating when tested to BS 476: Part 7.

Weather performanceThe external louvres provide 98.6% rainrejection when independently tested atBSRIA to BS EN 13030. When tested toBS EN 1027 the closed ventilators arewatertight at over 1000Pa pressure.

Air leakage performanceWhen tested the air leakage rate of theclosed ventilators is 0.57 m3/hour/m at50Pa pressure. The linear metre lengthis defined as the perimeter of the unitplus the total length of the louvre-to-louvre contact. This equates to anapproximate value in terms of face areaof 9.0m3/hour/m2 at 50Pa pressure(depending on unit size).

Thermal insulation performanceAverage calculated U-value of theventilators is 1.1W/m2K in wallapplications.

Controls and sensorsVentilation airflow is continuouslyvariable by means of 24V modulatingactuators. Ventilators can be controlledby Passivent’s range of thermostaticcontrols or programmable controllers,or linked to a building energymanagement system. Passivent also offera range of control sensors fortemperature, CO2 and wind for exposedlocations.

Modular applicationsAircool ventilators can also be suppliedin modular form, see page 10.

Aircool wall ventilator in masonry wall

Fixed externalweather louvres

Internal protective cover grille

Wall sleeve supplied tolink internal and externalelements for maximumairtightness and security

Controllable motorisedinsulated internal dampers(shown closed)

Insect screen

Fixed external weather louvres

Aircool window ventilator in curtain walling

Internal protective cover grille

Thermal break

Controllable motorisedinsulated internal dampers(shown open)

Insect screen

Complete Aircool units in masonrywalls and windows/curtain walling

Glazing

Specification clauseStandard AircoolAircool louvre ventilatorsfor masonry walls/windows/curtain walls*having extrudedaluminium frame withABS thermal break,extruded aluminiumexternal weather louvres,4mm insect screen, andaluminium internal covergrille. Insulated internalmotorised controllabledampers fabricated fromdouble skin of aluminiumwith ABS thermal breakand blade compressionseals. U-value 1.1W/m²Kwhen closed. 24V actuatorfor internal louvrescontrolled by eC/ic8000*wall-mounted switch-gear.Ventilators designed andmanufactured under BS EN ISO 9001, andsupplied by Passivent Limited, NorthFrith Oasts, Ashes Lane,Hadlow, Kent TN11 9QUTel: 01732 850770, Fax: 01732 850949, Email:projects@passivent.com(and installed by anapproved installer). *Delete as applicable.

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AIRCOOL VENTILATORS

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The Hybrid Plus Aircool combines thefeatures of the Aircool ventilator with aninnovative air tempering and mixing unitutilising a single energy efficient low powersweep fan (when required).

It can be used in a range of differentstrategies including Passive stack and singlesided ventilation.

It provides low airflow resistance thatenables the combined unit to also beoperated in passive mode without the fanrunning when not required.

In peak summer conditions, the energyefficient low power fan can be activated topromote air movement keeping theventilation strategy operating andtemperatures under control.

In unusual building occupancy events suchas the generation of excessive CO2 levels orexcessive heat gains such as occasional highdensity occupation, the fan can also beactivated to purge the space more rapidlythan a passive ventilation system will allow. Sectional drawing of the unit within a wall strategy

HYBRID PLUS AIRCOOL

Specification clauseHybrid Plus Aircool,incorporating Aircoolventilator with a mixingchamber. Aircool formasonrywalls/windows/curtainwalls* having extrudedaluminium frame withABS thermal break,extruded aluminiumexternal weather louvres,4mm black polypropyleneinsect screen.Insulated motorisedcontrollable dampersfabricated from doubleskin of aluminium withABS thermal break andblade compression seals.Mixing chamber finishedto RAL 9016 white,incorporating low powerfan, controllable mixingdampers and RAL 9016aluminium internal covergrille.Mixing chamber isconnected to the façademounted Aircool unit viabespoke ducting (to beseparately supplied).Passivent can supply thisducting upon request,once the Aircooldimensions within thefaçade and the depth backinto the room are defined.Ventilator U-value1.1W/m²K when closed.24V modulating actuatorcontrol for dampers,controlled by iC8000intelligent controller.Fan flow rate of up to 170 l/s.Ventilators designed andmanufactured under BS EN ISO 9001, andsupplied by Passivent Limited, NorthFrith Oasts, Ashes Lane,Hadlow, Kent TN11 9QUTel: 01732 850770, Fax: 01732 850949, Email:projects@passivent.com(and installed by anapproved installer).*Delete as applicable.

In winter, colder spring and autumn periodsthe Hybrid Plus Aircool tempers theincoming air with warmer internal air beforeit enters the space thereby minimising therisk of cold draughts for the occupants.

The Hybrid Aircool Plus is one of theslimmest in its class due to the uniqueinternal design, only using a single 50wenergy efficient fan and can either bemounted within a dedicated bulkhead,within a suspended ceiling or exposed in thespace due to its white finished appearanceand diffuser grille. The Aircool part of theunit can be integrated into most window andwall applications enabling a flexibility of use.

Effective and intelligent control of theHybrid Plus Aircool is critical to maximisingit’s performance and can be effectivelyoperated using the Passivent iC8000controller which can be integrated through a building management system. Internalcombined CO2 and temperature sensorsalong with an external temperature sensorare used with pre-defined set points fordifferent operating modes.

Internal appearanceInternal case construction is finished inwhite RAL 9016.

DimensionsInternal tempering and mixing unit:1000mm(w) x 400mm(h) x 1000mm(d) intothe space. Weight approximately 55kg.Aircool size would be supplied to suit thebuilding requirements, typically 962mm(w)x 660mm(h).The interface duct between the two units isto be supplied and built on site or specialorder from Passivent due to its dedicatednature.

InstallationPositioned within the space, either ondisplay or within a suspended ceiling orbulkhead.

PerformanceFree area of each unit: 0.238m2.Maximum flow rate when inlet and outlet resistances are equal and fan is in operation: 170 l/sec.

Hybrid Plus Aircool

Tempered air

Standard Aircool

Damper doors

Hybrid Plus Unit

Standard Aircool

Adaptor duct (specialorder from Passivent)

Low energy sweep fan

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AIRCOOL VENTILATORS

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ACOUSTIC AIRCOOL

Airflow heater coil

Internal cover grille

Airflow heater coil

Controllable motoriseddampers

THERMAL AIRCOOL

The Passivent Thermal Aircool has beenspecifically designed to supply buildings withwarm, fresh air during cooler weatherparticularly when the Hybrid Plus Aircool isnot suitable due to inadequate availability of“free heat” from the room itself or arequirement for higher airflows than can beprovided when in passive mode.

The Thermal Aircool will also provide afresh air inlet in warmer conditions, whenair warming is not required thus providefresh air ventilation throughout the year anda secure night cooling strategy in warmerweather.

The Thermal Aircool system incorporates alow resistance airflow heater coil, which hasbeen specially designed for naturalventilation systems and is connected into themain central heating system of the building.An integral temperature sensor preciselycontrols the heater coil. Combined with thePassivent range of natural ventilationcontrollers, this ensures the correct level ofventilation is supplied at the requiredtemperature.

The Thermal Aircool also incorporates allthe features and benefits of the standardAircool (see page 4).

SizesEnquire for available sizes and minimum depth requirements.

The Acoustic Aircool range is available inwall and window versions. The range hasbeen developed to meet increasedregulation requirements for soundreduction, and the increased noiseexposure resulting from the greater use ofbrownfield sites.

Independent test data to BS EN 20140-10is available on request, with detailedperformance figures for each application.

Depending on requirements, acousticventilators may have a single or doublerow of internal acoustic chevrons, acousticliners. For special high noise reductionrequirements, Passivent can design andmanufacture bespoke ventilators tomaximise sound reduction and minimiseairflow resistance so as to achieve targetair change rates.

Passivent Aircool acoustic façadeventilators can be complemented byPassivent Soundscoop and Soundscoop iAT(intelligent airflow technology) acousticventilators for internal air transfer. This broader product range providesdesigners with the opportunity to adoptcomplete natural ventilation solutionswhere buildings have high external noiselevels.

Aircool acousticwall ventilator797 x 315 x570mm, withexternal weatherlouvre and doubleinternal acousticchevrons,providing aweightednormalised soundlevel differenceDn,e,w of 26dB(when open).

Controllable motoriseddampers (shown open)

Controllablemotoriseddampers(shown closed)

Specification clauseAcoustic Aircoolventilators for masonrywalls/windows/curtainwalls* having extrudedaluminium frame withABS thermal break,extruded aluminiumexternal weather louvres,4mm insect screen, andaluminium internal covergrille. Units to havesingle/double* acousticchevrons to achieve aweighted normalisedsound level difference of22/26* Dn,e,w across theventilator to BS EN20140-10. Insulatedinternal motorisedcontrollable dampersfabricated from doubleskin of aluminium withABS thermal break andblade compression seals.U-value 1.1W/m²K whenclosed. 24V actuator forinternal louvrescontrolled by iC8000.Ventilators designed andmanufactured under BS EN ISO 9001, andsupplied by Passivent Limited, NorthFrith Oasts, Ashes Lane,Hadlow, Kent TN11 9QUTel: 01732 850770, Fax: 01732 850949, Email:projects@passivent.com(and installed by anapproved installer).*Delete as applicable

Wall sleeve supplied tolink internal andexternal elements formaximum airtightnessand security

Specification clauseThermal Aircool louvreventilators for masonrywalls/windows/curtainwalls* having extrudedaluminium frame withABS thermal break,extruded aluminiumexternal weather louvres,4mm insect screen, andaluminium internal covergrille. Insulated internalmotorised controllabledampers fabricated fromdouble skin of aluminiumwith ABS thermal breakand blade compressionseals. U-value 1.1W/m²Kwhen closed. 24V actuatorfor internal louvrescontrolled by iC8000.Ventilators designed andmanufactured under BS EN ISO 9001, andsupplied by Passivent Limited, NorthFrith Oasts, Ashes Lane,Hadlow, Kent TN11 9QUTel: 01732 850770, Fax: 01732 850949, Email:projects@passivent.com(and installed by anapproved installer).*Delete as applicable

Aircool acoustic wall ventilator797 x 315 x 390mm, with externalweather louvre and single internalacoustic chevrons, providing aweighted normalised sound leveldifference Dn,e,w of 22dB (when open).

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OTHER APPLICATIONS

Modular applicationsAircool ventilators and the various elementsthat make the total unit can also be suppliedin modular form, with the external weatherlouvres (also with the patented double bankweather louvre system), internal insulateddampers and internal cover grilles asseparate components, providing extraflexibility in ventilation design.

Controllable insulatedlouvre

Internal cover grille

External weather louvre

Sidcot School, showing external weatherlouvres separated from internal controllablelouvres and cover grille.

Passive stack ventilationThis design using passive stack ventilationwas successfully adopted in a multi-storeybuilding to meet fire regulations and reducerisk of ‘cross talk’ (ie sound leakage between floors).

Natural ventilation was achieved by passiveinduced cross ventilation before entering thestack. Fresh air was introduced at thewindows and drawn across rooms, thenthrough Aircool dampers, and extracted athigh level through Aircool windowventilators located at the top of the lightwell/stack.

Aircool insulated dampers were used incombination with fire dampers to maintainthe integrity of fire protection betweenfloors. Acoustic chevrons were fitted behindthe Aircool dampers to the louvres to provideacoustic attenuation between floors. Aircooldampers positioned in the rooms gave theusers controllability with individual room airvolume control, and provided thermalinsulation during unoccupied periods.

In exposed locations Passivent patentedsecondary weather baffles were fitted behindthe external weather louvres to provide aClass A weather rejection performance.Aircool extracts can be located in high levelwindow frames, behind weather louvres,within a terminal arrangement or inpurpose-designed parapet walls.

Aircool externalweather louvres withsecondary weatherbaffles

Motorised internaldamper withfireproof sleeve andfire damper

Passiveventilationstack

Motorised internaldamper withfireproof sleeve andfire damper andacoustic chevrons