passivent natural daylight solutions · 2017-05-22 · passivent natural daylight systems, used as...

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NATURAL DAYLIGHT SOLUTIONS

CI/SfB (37.4)Uniclass L414November 2011

Newlow profile

glazing

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SustainabilityThe sun is a sustainable light source, andnatural daylight can make a significantcontribution to sustainable building design.Rooflights are an effective and efficientmeans of maximising natural daylight indark areas, often virtually eliminating theneed for supplementary electric lightingduring the day.

Passivent natural daylight systems, used as acomplement to artificial lighting, canconsiderably reduce the annual energyconsumption of any building, therebyreducing CO2 emissions.

Proven benefits of natural lightScientific studies have shown the positivebenefits of natural daylight for health andwellbeing in a range of applications.

The CIBSE Office Lighting Guide states thatNatural Daylight is an almost universalworker requirement. When given a choice,most people prefer a working environmentwith daylight to one without. It referencesdocumented evidence confirming thatexcluding daylight leads to increasednumbers of complaints about the workingenvironment, and may adversely affectproductivity. The Daylight WorkplaceRegulations state that “The lighting in everyworkplace shall, as far as is reasonablypractical, be by natural light.”

BRE Environmental Assessment MethodThe benefits of natural daylighting arerecognised by the Building ResearchEstablishment (BRE) EnvironmentalAssessment Method (BREEAM).

BREEAM Modules cover Schools, Offices,Healthcare, Retail and Industrial buildings.These buildings are then rated on a scale ofPASS, GOOD, VERY GOOD or EXCELLENT.Passivent natural daylight systems cancontribute to the credits available under theHealth and Wellbeing Section HW01 and theEnergy Section E01.

Passivent market a range of naturaldaylighting products includingtubular rooflights, conventional

rooflights, combined rooflight/ventilatorsand hybrid lighting systems.

Advantages● Highly effective at delivering light into

internal and badly-lit spaces withoutwindows.

● Energy saving - reduces the need for artificial lighting.

● Wide range of applications - houses, flats,schools, hospitals, commercial, industrialbuildings, care homes, nursing homes andstudent accommodation.

● Suitable for both new-build andrefurbishment projects.

● Meet the thermal requirements of the latest building regulations.

● Hybrid natural and artificial lighting solutions.


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PRODUCT RANGE

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Natural daylighting 2

Sunscoop tubular rooflight systems 4

Sunscoop iPSV light & ventilation 10

Sunscoop square ducted 11

Sunscoop hybrid 12

Metrodome modular rooflights 13

Sunstract rooflight/ventilator 16

Litevent Airstract rooflight/ventilator 18

Further information 20

Tubular and square ducted rooflightsSunscoop™ tubular rooflights

Used to bring natural daylight into internalrooms and spaces that have no, orinsufficient, windows. Natural daylightenters through a roof-mounted dome orskylight and is reflected down a mirroredtube/duct and into the room below througha ceiling-mounted diffuser. Particularlyuseful for rooms and spaces below anotherroom or a pitched roof. Also available withoccupant sensor and a daylight controller forintegrated low energy artificial lighting.A combined light and ventilation unit(Sunscoop iPSV) is also available.

Sunscoop square ducted rooflights

Square systems of a larger size retaining thefeatures of the tubular systems.

Sunscoop hybrid

A unique, automatic and energy savingsystem combining natural daylight andluminaire to achieve more consistentilluminance irrespective of externalconditions

Metrodome modular rooflightsAn all-aluminium rooflight and access hatchrange offering ventilation options andthermal efficiency. Designed for both newbuild and refurbishment applications.Particularly suitable for refurbishment, sincenon standard sizes can be made to suitexisting roof openings and kerbs.

Combined rooflight/ventilator systemsSunstractCombined natural controllable ventilationand natural daylighting functions in oneunit. Suitable for high ventilation capacitiesand for providing light to lower floors usinghighly reflective light ducts.

Litevent AirstractCombines natural controllable ventilationand natural daylighting functions in oneunit. For installation on flat or low-pitched roofs,the upstand will accommodate both warmand cold deck constructions without theneed for an additional timber kerb.

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Sunscoop™ Tubular Rooflight systems areused to bring natural daylight into

internal rooms and spaces that have no, orinsufficient, windows.

Sunscoop Tubular Rooflights consist of aroof-mounted clear polycarbonate dome orskylight connected to a tube with an internalmirrored finish with 98% reflectance.Natural daylight enters the dome or skylightand is reflected down the tube and into theroom through a ceiling-mounted diffuser.

Sunscoop advantages● Highly effective at delivering light into

internal and poorly lit spaces.

● System design and performance are backedby an unrivalled programme of research.

● Energy saving - reduces the need forartificial lighting.

● Natural daylight has positive benefits overartificial lighting.

● Wide range of applications - houses, flats,schools, hospitals, commercial andindustrial buildings.

● Range of sizes for different requirements.

● Simple and reliable installation.

● Can be used on pitched and flat roofs.

● Adjustable elbows give flexibility of sitingon tubular systems.

● Complete system meets the thermalrequirements of the latest buildingregulations.

● Sunscoop daylighting performancesoftware calculations available.

● Sunscoop Hybrid systems available,combining natural and artificial lightingwith integrated intelligent controllers.

Silsoe Research Institute report


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Internal view of differentdiameter tubularrooflights under test

Monitoring of threetubular rooflightssimultaneously

External lux sensor withshade ring for measuringdiffused light levels

PERFORMANCE

Unique test programmeThe performance of the Sunscoop TubularRooflight system has been firmly establishedby a unique and extensive period of testing,unparalleled in the tubular rooflightindustry, carried out by Silsoe ResearchInstitute (SRI) and BPD. Measurements weretaken over four to six month periods duringthe summer/ autumn in all natural lightconditions ranging from bright clear skies toovercast conditions.

This comprehensive monitoring has for thefirst time provided accurate, realistic andreliable performance data for tubularrooflight systems including direct anddiffuse lighting conditions.

The research is subject of a published paperentitled “Optimisation & design of ducteddaylight systems: 2010” which is specific toPassivent systems only.

Typical light levelsThe light output from the Sunscoop systemdepends on the size and length of tubing,offset angles if any, the external skyconditions and light levels measured in lux.

The distribution of the light in the roomdepends on the diffuser type and the wall,ceiling and floor reflectances.

A sophisticated in house computerprogramme has since been developed toaccurately predict light levels of Sunscoopsystems, based directly on the SRI and BPDmonitoring.

System layoutSunscoop systems can pass through a roofspace or other void.

For maximum effectiveness the tubingshould be as straight as possible. However,since it is often impractical to site the ceilingdiffuser directly below the roof-mountedglazing, the tubing system allows an offsetby means of an elbow. It is adjustable up to30º from vertical.

Other elbows can be used but monitoringhas shown that these will adversely affectperformance.

SitingWhere possible the roof-mounted glazingshould be located on a south-facing slope togain the maximum amount of daylightunder both direct and diffuse conditions.

Factors which need to be considered whensiting a Sunscoop include:- Location of the room to be lit and suitable

position of the ceiling diffuser.

- Roof space obstructions.

- Proximity of other buildings, trees etc,which may cast shadows at certain timesof the day or year.

Passivent Sunscoop & Airscoop Builder has been purposedesigned to interface with EDSL’s established Tas buildingthermal analysis tool, which is the first dynamic simulationmodeling (DSM) of its kind to be approved for both BuildingRegulation Approved Document L2 and the EnergyPerformance Certificate. The Passivent programme adds afurther dimension to the Tas Building Designer system, whichalready calculates performance taking into account the long-term dynamics affecting the building according to its locationand orientation.

Passivent Sunscoop Builder enables users readily to model thebuilding daylight factor to BRE methodology, taking account ofPassivent Sunscoops and Sunstracts. It also enables calculationof the number and size of Sunscoops required to achieve a giveninternal illuminance, enabling their associated impact onenergy and carbon performance to be assessed

SUNSCOOP™ BUILDER SOFTWARE

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Site-fabricated insulated upstand

For more information on installation details pleasecontact Passivent Technical Services.

Sunscoop on pitched roof

Roof flashing withAluFlash attached

Traditional skylight, polyesterpowder coated aluminium framewith polycarbonate glazing

98% reflective tubing

98% reflective tubing

Square to round adaptorwith integral elbow

Sunscoop on standing seam roof

Adjustable elbow to 30°

Sunscoop on flat roofLow profilepolycarbonate glazing

Insulation by others

Ceiling diffuser

98% reflective tubingwith insulation

Single skin aluminiumupstand

Insulation by others

Low profilepolycarbonate glazing


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Specification clause

Natural daylight to …rooms to be provided bymeans of PassiventSunscoop tubular / squareducted* systemscomprising:Roof-mounted low profileglazing of 3.0mm clearuv-stabilisedpolycarbonate covered by10-year warranty againstloss of impact strength,excessive yellowing andloss of light transmission.Roof interface flashing tobe ... To have AA fire rating toBS 476: Part 3; 2004.Tubes and elbows to beSR98 Mirror withreflectance 98% and 25-year warranty. System diameter: 250mm/ 350mm / 450mm /530mm / 885mm.*Circular recessed ceilingdiffuser of diffusedpolycarbonate with white-capped ABS ceiling ring /chrome / brass effect /Skyview diffuser circular /Skyview diffuser square.*Options to be fitted:Polycarbonate secondaryglazing skin, integralelectric light fitting, light-attenuating damper, fireprotection collar.*All exposed tubes andelbows within unheatedvoids to be wrapped withtube insulation. System toachieve an overall U-valueof 2.2W/m2K.*Supplier: Passivent Ltd, North Frith Oasts, Ashes Lane, Hadlow. Kent TN11 9QUTelephone: 01732 850770,Fax: 01732 850949. Email:[email protected]: Passivent Ltd. 2 Brooklands Road, Sale.Cheshire M33 3SSTelephone: 0161 905 5700,Fax: 0161 905 2085.Email:[email protected] *delete as applicable+ Square ducted systemsonly

Pitched roof flashings? ? ? ? Universal Slate ? ? ? ? Universal Tile (All types) ●? ? ? ? Universal Standing seam ●? ? ? ? Traditional Slate? ? ? ? Traditional Tile

Flat roof flashings? ? ? ? Universal Single Ply ? ? ? ? Universal Torch on? ? ? ? Universal Standing seam ●

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Roof interface flashingsA range of dedicated roof flashings isavailable for different types of pitched andflat roof coverings, as shown below.

● Requires a site-fabricated upstand.

350m

m diam. tube

250m

m diam. tube

450m

m diam. tube

530m

m diam. tube

Health and safetyThe Sunscoop glazing and flashings havebeen impact-tested to BS EN 1873 ModularRooflights and may be deemed to be non-fragile for HSG33 Safety in Roofwork.

The Sunscoop glazing and flashings have anAA fire rating to BS 476: Part 3: 2004, andcan therefore be used on roofs withoutrestriction on number, spacing or position.

Pitched roof flashings

Flat roof

Universal Tile on plain tiles

Universal slate on pitched roof

Traditional skylight

Universal single ply on flat roof

Universal tile on pitched roof


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Anodised aluminium base material

Bonding layer

Pure super silver or pure aluminium layer

Super reflective (LR) oxide layer

Super reflective (HR) oxide layer

Roof-mounted glazingSunscoop glazing is manufactured from3.0mm clear uv-stabilised polycarbonatewith 92% light transmission.

The glazing is available in two types;

Square dome fitted to a builders kerb orsupplied insulated upstand.

Traditional skylight fitted within tile andslate coverings. For further information seepage 7.

Both have a 10-year warranty (supported bythe polycarbonate manufacturer) againstloss of impact strength, excessive yellowingand loss of light transmission.

The warranty also covers any effects of theforming process. Not all manufacturers offerthis warranty.

Polycarbonate secondary glazing is alsoavailable to maximise insulation levels alongwith the use of tube insulation (suppliedseparately).

Tubes and elbowsTubes and elbows are anodised aluminiumwith a multi-layer specular coating whichensures pure white light with no colourshift, even after multiple reflections downthe light tube / shaft. The material calledSR98 Mirror incorporates a pure super silverlayer and has a total reflectance of 98%.

The multi-layer optical coating system isatomically bonded to the substrate.Laminated or glued reflective sheets are notused.

It has a 25-year product warranty whichguarantees that the material will not splinter,yellow, darken, peel off, blister, crack ordevelop any other surface degradation whichcould reduce overall reflectivity, even afterprolonged uv exposure. The finished materialsare electrostatically neutral and will notattract airborne dust even during installation.

SizesTubular systems diameter: 250mm, 350mm, 450mm, or 530mm.Starter tube length: 300mm.Elbow adjustment: up to 30°.Intermediate tube: 600mm.Can be cut as required on site.

Square systems: 885 x 885mm (see page 11)

Universal slate on pitched roof

Universal tile on plain tiles

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Ceiling diffusers

Circular ceiling diffuserThe standard recessed ceiling diffuser for alltube sizes, designed to maximise lighttransmission. Its translucent surfaceprovides privacy and spreads the lightefficiently throughout the room.

Manufactured from diffused polycarbonatewith white-capped ABS ceiling ring to hidefixings. Also available in chrome or brasseffect finish.

Skyview diffuser, squareOptional for 450mm and 530mm tube only.Similar to the circular Skyview but mountedin a 600 x 600mm polycarbonate panelwhich can be fitted in a suspended ceiling.

Skyview diffuser, circularOptional for all tube sizes. The innovativeSkyview diffuser consists of a grid of fresnellenses which provides a wider spread of lightwithout excessive losses and enables the skyto be viewed.

Integral electric light fittingThe Sunscoop can be supplied with anoptional integral electric light fitting (two on450 and 530mm systems) which takes a 13Wor 20W low-energy lamp (equivalent to a65W or 100W conventional lamp). Thisavoids the need for an additional light fittingfor night-time use.

Light-attenuating dampersControl over the light level entering theroom may be required at certain times, forexample in conference rooms, lecturetheatres, classrooms and hospital wards.

The optional Sunscoop motorised light-attenuating damper provides this control; itis actuated from a wall switch, separatelyavailable.

Fire protection collarsIn longer Sunscoop systems the tubing maypass through an intermediate floor or ceilingthat provides fire separation. As with anyducted system it is important that it does notform a path for fire.

Fire protection collars providing up to 120minutes fire resistance to BS 476: Part 20:1987 are available for all sizes of Sunscoop

Tube Insulation (supplied separately)Specifically designed to contribute to theoverall thermal performance of the system.All exposed tubes and elbows withinunheated voids should be lagged with tubeinsulation to reduce heat loss and the risk ofcondensation within the tube.

Thermal insulationOur Technical Services Department canprovide computer calculations of U-values indifferent roof constructions using Sunscooprooflights, including the use of secondaryglazing skins and/or tube insulation, tocomply with Building Regulations Part L2010.


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The Passivent Sunscoop iPSV™ system isdesigned to provide both natural daylight

and ventilation to bathrooms, toilets,kitchens, en suites and other similar areas,in both domestic and commercialapplications.

Natural daylight enters through a roofmounted dome and is reflected down the highly reflective tubing througha Skyview ceiling diffuser. This innovativediffuser consists of a grid of fresnel lenseswhich provides a wider spread of lightwithout excessive losses and enables the skyto be viewed.

Ventilation is controlled by the ‘intelligent’extract operated by a series of nylon bands,which respond to humidity levels andregulate the size of the air opening.

Utilising a separate ducting system allowsoptimum performance from both units - theshortest possible length to maximise naturaldaylight through the ceiling diffuser and aseparate duct for the extract to optimumlength for the stack effect.

Key features● No electrical connection or power source

is required so the system is naturallyenergy efficient.

● Intelligent humidity controlled extractresponds automatically to changes inrelative humidity giving greaterventilation when humidity is high whilstpreventing unnecessary ventilation andheat loss when humidity is low.

● 24 hour condensation control with gentleextraction - operates all day and every dayas required combating condensation andmould growth.

● Completely silent in operation.● Complies with the requirements of

Approved Document F.● Minimal maintenance - no mechanical

components to go wrong. No costly solarpanels or battery backups.

● Automatic response and no operatingcontrols, ideal for special needsapplications.

● Tests by Building Research Establishment(BRE) have shown an intelligent passivestack system incorporating a humiditysensitive extract gives a 15 - 40% savingin ventilation heat loss dependent onoccupancy levels.

● Thermal modelling by De MontfortUniversity has shown that the intelligentpassive stack system operates effectivelyeven in summer months and internalbathrooms. The research alsodemonstrated effectiveness even in veryairtight dwellings.

● Can be supplied with optional integralelectric light fitting which takes a lowenergy bulb to avoid the need foradditional light fitting for night time use.

Size250mm diameter Sunscoop Ventilation unitarea provides 12,270mm2 at maximumhumidity with 125mm ducting.

TT9 Versatile tile ventilator

Flexible ducting (support and insulationomitted for clarity)

Ceiling (insulation omitted for clarity)

Low profile glazing onUniversal tile flashing

SR 98 Mirror reflective tubeguides daylight down to theceiling diffuser (insulationomitted for clarity)

Combined extract ventilatorand Skyview diffuser


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The Sunscoop™ square ducted sharesmany of the features of the tubular

systems and incorporates additional featuresto accommodate the system’s larger size. Itprovides high levels of natural daylight overlonger lengths, meaning the product cancontribute to the reduction of energydemand in commercial buildings.

Key features● 885mm square ducted system for greater

structural stability and light output.

● Structural sub-base provided for ease ofinstallation and weathering into a widerange of roof coverings.

● Diffused glazing reduces ‘hot spots’ andspreads the light for ducting down thesystem.

● Wind load tested up to 51m/s.

● Can be used in flat or pitched roofs withpitch-dedicated colour matchedweathering skirt.

● Reduces the need for artificial lighting,also reducing energy costs.

● Thermally insulated upstand to minimiseenergy losses.

● Single or double glazing to minimise heatloss.

Composition3mm to 4mm polycarbonate double or tripleskin diffused glazing, formed with a dome orpyramid finish. Glazing has a 10 yearpostformed warranty from the sheet supplieragainst yellowing and loss of lighttransmission, and for impact resistance.

External grade plywood structual sub-baselined with 98% reflective material. The subbase offers a secure roof fixing up to 51m/swind speed and is independently tested bythe BRE.

Modular duct lengths: 750mm, 500mm and250mm.

The ceiling diffuser has an adaptor with anadjustable sleeve to accommodate variationsin final duct length.

Roof mounted diffusedpolycarbonate glazing

Pitch dedicated andcolour matchedweathering skirt

Insulated structuralsub base

98% reflective ductingguides daylight downto the ceiling adapter

Ceiling adaptorwith adjustablesleeve

Ceiling diffuser


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The Sunscoop™ hybrid is a 350mm unitwith a daylight controlled dimmable low

energy compact fluorescent luminaireintegrated into the ceiling diffuser assemblyto provide a more consistent light leveldespite changing external daylightconditions.The CIBSE Lighting Guide 10 - Daylightingstates that: “Case studies have shown that ina conventionally daylit commercial buildingthe choice of control can make 30-40%difference to the resulting light use”. The Sunscoop hybrid has a control unitwhich controls both occupancy and daylightlevels, maximising the energy savings fromlighting.

Key features● The Sunscoop hybrid incorporates a light

sensor which is programmed to turn onwhen the light level inside the room dropsbelow a certain level.

● Luminaire turns on with optional ‘softstart’, allowing a gradual increase in lightoutput and adjustment to the requiredlevel.

● The Sunscoop hybrid incorporates alighting controller, lux sensor and PIRpresence detector.

● When the unit determines there isadequate natural light available, the lampis automatically turned off.

● When light levels fall, the lamp isswitched back on and its output continuesto be regulated by the daylight sensor.

● The programmable PIR presence detectorwill turn off the lamp when the space isunoccupied irrespective of the light level.

Ceiling Diffuser / LuminaireThe unit comprises a 350mm standarddiffuser with option for Skyview type. Theadjacent luminaire features a white powdercoated spun aluminium bezel and a diamondfaceted vacuum metallised aluminiumreflector housing a dimmable 26W compactfluorescent lamp. Sensor and control gearare pre-fitted.

Sizes350mm diameter unit contains onedownlight, which at full capacity producesan output of 1800 lumens.

AppearanceWhite ABS ceiling diffuser ring toencompass both Sunscoop diffuser anddownlight assembly.

PerformanceThe sensor which is looking directlydownward continously monitors the lightlevel reflected back to the ceiling andregulates the output of the compactfluorescent lamp to maintain an approximatepre-determined light level. Setting the pre-determined light level requires the unit to becommissioned by a Passivent MastercareInstaller.

Note: Since daylighting and room conditionscan change continuously, the lighting levelachieved may vary to some extent from thepre-set level.


Natural daylight andartificial lighting to …rooms to be provided bymeans of PassiventSunscoop hybrid systemcomprising:Roof-mounted low profileglazing of 3.0mm clearuv-stabilisedpolycarbonate covered by10-year warranty againstloss of impact strength,excessive yellowing andloss of light transmission.Roof interface flashing tobe ... To have AA fire rating toBS 476: Part 3; 2004.Tubes and elbows to beSR98 Mirror withreflectance 98% and 25-year warranty. System diameter: 350mmCircular recessed ceilingdiffuser of diffusedpolycarbonate with white-capped ABS ceiling ring /Skyview circular diffuser*incorporating daylightcontrolled low energycompact fluorescentluminaire, lightingcontroller, lux sensor andPIR presence detector.Options to be fitted: Lightand sun deflector (LSD),polycarbonate secondaryglazing skin, light-attenuating damper, fireprotection collar.*All exposed tubes andelbows within unheatedvoids to be wrapped withtube insulation. System toachieve an overall U-valueof 2.2W/m2K.*Supplier: Passivent Ltd, North Frith Oasts, Ashes Lane, Hadlow. Kent TN11 9QUTelephone: 01732 850770,Fax: 01732 850949. Email:[email protected]: Passivent Ltd. 2 Brooklands Road, Sale.Cheshire M33 3SSTelephone: 0161 905 5700,Fax: 0161 905 2085.Email:[email protected] *delete as applicable


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Metrodome is an all-aluminium rooflightrange offering ventilation options and

thermal efficiency, with a choice of triple ordouble skin polycarbonate glazing. Suitablefor new-build or refurbishment, on bothwarm and cold deck flat or low-pitched roofs.Non-standard sizes can be made to suitexisting roof openings and kerbs. Accesshatches are also available.

Key features● All-aluminium design incorporating

double skin upstand.● Thermally enhanced glazing frame

providing a high level of security.● Driving rain resistant.● Independently impact tested, may be

deemed non-fragile.● Standard or humidity-sensitive trickle

ventilation options.● Available triple or double glazed.● Rooflights can be manufactured to suit

non-standard roof openings.

AccessoriesA range of complementary rooflightaccessories is available, including:● Metroglazing triple or double skin

polycarbonate domes and pyramids inclear, diffused or bronze, for fittingdirectly to builder’s kerbs.

● Tamper proof security fixings suppliedseparately.

● Manual opening operating poles.● Anti-vandal/security bars available, please

consult Passivent Technical Services forfurther details.

METRODOME MODULAR ROOFLIGHTS

Metrodome fixed closed, fitted direct toroof

Triple skin polycarbonate glazing

Aluminium frame

DV4 Delta ventilator

Insulated aluminiumupstand

Roof opening size


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Triple skin polycarbonate glazing

Aluminium frame

ES4 Energy Saverventilator

Insulated aluminiumupstand with weatheringflange

Note: the finished builder’s kerb should not beless than 75mm ±5mm in width to provideadequate fixing for the rooflight upstand.

Metrodome fixed closed, on builderÕs kerb

Internal lining to lightwell

Overall kerb size

Roof opening size

Roof interfacePassivent rooflights can be supplied forfitting either directly on the roof deck, or ona builder’s kerb (usually made on site).

In new build, an integral upstand is thefavoured choice as it provides a prefinishedinternal skin and an exterior to accept theroof covering. In refurbishment, a builder’skerb will often already exist.

UpstandMetrodome is supplied with an integralupstand for fitting directly to the roof deck,or with an additional weathering flange atthe base of the upstand for fitting to abuilder’s kerb. The upstand is manufacturedfrom double skin mill finish aluminium withan insulated core, mitred and welded atcorners. The internal face is finished whitefor maximum light reflectance.

GlazingTriple or double skin polycarbonate withvented air gap, in extruded mill finishaluminium frame with mitred and weldedcorners. Available in clear, diffused or bronzeglazing in dome or pyramid shapes.

The glazing comes with a 10 year postformedwarranty supported by the polycarbonatemanufacturer against loss of impactstrength, excessive yellowing and loss oflight transmission.

OpeningAvailable either fixed closed, manual openingor electric opening. Opening options open toa height of 300mm. For rapid ventilationareas available see table opposite.

Metrodome sizesRoof opening size Daylight Max. opening(mm x mm) area (m2) area (m2)

600 x 600 0.135 0.139750 x 750 0.270 0.274900 x 600 0.303 0.251900 x 900 0.448 0.4121050 x 750 0.426 0.4151050 x 1050 0.672 0.4991200 x 900 0.650 0.5021200 x 1200 0.941 0.5961350 x 750 0.582 0.5061350 x 1050 0.918 0.5881350 x 1350 1.524 0.6841650 x 1200 1.377 0.7321650 x 1350 1.590 0.7741950 x 1350 1.926 0.864

Electric opening

Manual opening

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Insulated aluminium lid (or may be glazed)

Gas strut


Delete items not requiredRooflights to be PassiventMetrodome, manufacturedto BS EN ISO 9001Supplier: Passivent Ltd, North Frith Oasts, Ashes Lane, Hadlow. Kent TN11 9QUTelephone: 01732 850770,Fax: 01732 850949. Email:[email protected]: Passivent Ltd. 2 Brooklands Road, Sale.Cheshire M33 3SSTelephone: 0161 905 5700,Fax: 0161 905 2085.Email:[email protected]

Sizes: ..... Glazing: double/ tripleskin polycarbonate withventilated air gap inextruded mill finishaluminium frame withmitred and weldedcorners. Colour: clear/ diffused/opal/ bronze. Shape: dome/ pyramid.Roof deck upstand:205mm high withinsulated core, mitred andwelded corners.Builder’s kerb upstand:160mm high withinsulated core, mitred andwelded corners.Opening: fixed closed/manual opening/ electricopening to height of300mm.Ventilation: ..... DV4 Deltaadjustable ventilators/ ES4humidity controlledventilators fitted torooflight upstand.Internal fire spread ratingClass 1Y, external firespread designation AA.

Latch mechanism

METRODOME ROOF ACCESS HATCH

DescriptionMetrodome Roof Hatches provide access to aroof from inside a building. The constructionis similar to the standard rooflight but thetop opens to 90° and is supported by twin‘slip and stick’ gas struts. Tops are availableeither glazed or insulated aluminium. An internal latch retains the top when closedand can be secured with a padlock (notsupplied). These units are not available forbuilder’s kerbs.

SizeThe access hatch is available in the followingsizes: 900 x 900, 1050 x 1050, 1200 x 900 and1200 x 1200mm.

Thermal insulationThe insulated upstand and double or tripleskin glazing, with vented air gap, give goodthermal insulation and minimise the risk ofcondensation.

The overall calculated U-value for a 600 x600mm unit with triple glazing and upstandis 1.99W/m2K.

Passivent Technical Services Department canprovide computer calculations of U-valuesfor given rooflight sizes in different flat roofconstructions to comply with BuildingRegulations Part L 2010. The calculated U value will vary with the size of rooflight,due to the changing ratios of upstand,glazing and frame area.

Internal and external fire spread (B2/B4)The internal surfaces of the rooflightupstand and frame are non combustible andwould achieve a Class 1Y rating when testedto BS 476: Part 7: 1987.

Polycarbonate glazing a minimum of 3.0mmthick with a Class 1 rating is deemed byBuilding Regulations Approved DocumentB4 to be rated AA.

Metrodome rooflights can therefore be usedwithout restriction on size or spacing in alltypes of room and circulation space, exceptprotected stairways.

Weather resistanceMetrodome rooflights are deluge and drivingrain resistant as demonstrated by test.

Non-fragilityMetrodome rooflights meet the highest levelof impact resistance (1200 joules) to draftstandard BS EN 1873 in BRE tests, and maybe considered non-fragile under the latestguidelines of HSG33 ‘Health and safety inroof work’.

Sunstract system under test in real daylight conditionswith integrator box at base


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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SUNSTRACT™ ROOFLIGHT/ VENTILATOR

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The Sunstract™ combines controllablenatural ventilation with the ability to

provide natural daylight, meaning theproduct can contribute to the reduction ofenergy demand in commercial buildings.

Key features● Combines natural ventilation and natural

daylighting functions in one unit.

● Provides controllable ventilation withhigh lumen output.

● 885mm square ducted system for greaterstructural stability and light output.

● Structural sub-base provided for ease ofinstallation and weathering into a widerange of roof coverings.

● Diffused glazing reduces ‘hot spots’ andspreads the light for ducting down thesystem.

● Reduces the need for artificial lighting orventilation, also reducing energy costs.

● Thermally insulated upstand to minimiseenergy losses.

● Double or triple glazing to minimise heatloss.

Composition3mm to 4mm polycarbonate double or tripleskin glazing, formed with a dome or pyramidfinish. Glazing has a 10 year postformedwarranty from the sheet supplier againstyellowing and loss of light transmission, andfor impact resistance.

External weather louvres manufactured fromextruded aluminum with a 30mm pitch.

Insulated controllable louvres with 24Vmodulating actuators.

External grade plywood structual sub-baselined with 98% reflective material. The sub-base offers a secure roof fixing up to51m/s wind speed and is independentlytested by the BRE.

A frosted recessed diffuser suspended withinthe ceiling adaptor has an adjustable sleeveto accommodate variations in final ductlength. Suitable for use in plasterboard andsuspended ceilings.

PerformanceThe ventilation area of the Sunstract systemis 0.5m2.

The overall calculated U-value for aSunstract terminal with double glazed top is2.06W/m2K.


Natural daylight andventilation to … rooms tobe provided by means ofPassivent Sunstractsystem comprising:Roof-mounted unitincorporating triple /double glazed dome /pyramid* of 3.0mm clearuv-stabilisedpolycarbonate covered by10-year warranty againstloss of impact strength,excessive yellowing andloss of light transmission.Aluminium double bankweather louvres to achieve100% rain rejection to BSEN 13030:2001.Controllable insulatedlouvres on 4 sides toprovide ventilation area of0.5m2

To have AA fire rating toBS 476: Part 3: 2004.Duct sections to be 750 /500 / 250mm to be SR98Mirror with reflectance98% and 25-year warranty.System size: 850mmsquareRecessed ceiling diffuserof diffused polycarbonatewithin ventilated ceilingadaptor incorporatingadjustable sleeve.All exposed ducting withinunheated voids to bewrapped with tubeinsulation. Sunstractterminal will achieve anoverall U-value of2.03W/m2K.*Supplier: Passivent Ltd, North Frith Oasts, Ashes Lane, Hadlow. Kent TN11 9QUTelephone: 01732 850770,Fax: 01732 850949. Email:[email protected]: Passivent Ltd. 2 Brooklands Road, Sale.Cheshire M33 3SSTelephone: 0161 905 5700,Fax: 0161 905 2085.Email:[email protected]*delete as applicable

Internal mirrored louvres

Insulatedcontrollablelouvres

Roof mounted diffusedpolycarbonate double

or triple glazing

Aluminiumexternalweatherlouvres

Light diffuser

Insulatedstructural sub base

98% reflectiveducting guidesdaylight downto the ceilingadaptor

Ceiling adaptor(whiteinternal) withadjustablesleeve

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Insulated controllablelouvres in closed position

Terminal top cutaway

Aluminium externalweather louvres Secondary weather baffles

17Looking up the Sunstract shaft with the ceiling diffuser removed.


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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .LITEVENT AIRSTRACT ROOFLIGHT/ VENTILATOR

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The Litevent combines a controllableventilator and a rooflight, for installation

on flat or low-pitched roofs. It is designed tocontribute to reduction of energy demand incommercial buildings.

Key features● Combines natural ventilation and natural

daylighting functions in one unit.

● Provides controllable ventilation withminimal energy consumption.

● Reduces the need for artificial lighting,thereby further reducing energyexpenditure.

● Thermally insulated upstand and doubleskin glazing minimise heat loss.

● Height of upstand will accommodate bothwarm and cold deck constructionswithout the need for an additional timberkerb.

CompositionAluminium upstand with insulated core,incorporating insulated ventilation doors onall four sides, controlled by linked actuators(24V dc or 240V ac). Weather cowl is millfinish aluminium, and has an aluminiuminsect screen.

Rooflight has triple or double skin 3mm to4mm polycarbonate glazing with vented airgap, in an extruded aluminium frame withmitred and secret-welded corners. Glazinghas a 10-year postformed warranty from thematerial sheet supplier against yellowing andloss of light transmission, and for impactresistance.

Sizes

Litevent size* Daylight area Ventilation area(mm x mm) (m2) (m2)

600 x 600 0.270 0.350750 x 750 0.448 0.405900 x 900 0.672 0.4411050 x 1050 0.941 0.4961200 x 1200 1.254 0.551900 x 600 0.426 0.3961200 x 600 0.582 0.4511200 x 900 0.918 0.496

*Roof opening size

AppearanceAluminium upstand and glazing frame aremill finish as standard. Frame can besupplied polyester powder coated to order.Cowl is aluminium, mill finished asstandard.Glazing is clear, diffused or bronze. Shape: pyramid or dome.Internal surfaces finished in white formaximum light reflectance.

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PERFORMANCE DATA

Ventilation performanceMaximum ventilation area: see sizes table.Passivent can advise on size of Airstractterminal in relation to volume of airmovement required, likely externalconditions and internal temperatures.

Data from independent testing is availableon request.

Impact strengthThe unit has been subjected to large soft bodyimpact testing by BRE and may be considerednon-fragile to HSG 33. It will resist a soft-bodyimpact of at least 1200 Joules.

Fire spread: internal and externalRatings to BS 476: Part 7: 1987 are: Class 1for internal surfaces of the upstand and frame,and Class 1Y for the polycarbonate glazing.

Under Building Regulations ApprovedDocument B4 paragraph 15.7, apolycarbonate rooflight with a Class 1 ratingmay be regarded as having an AA designationfor external fire spread.

By virtue of the above performance, underApproved Document B2 Table 11 and B4Section 14, Litevent ventilators can be usedwithout restriction on size or spacing in alltypes of occupiable and circulation spaceexcept protected stairways.

Weather resistanceDriving and deluge rain resistancedemonstrated by test.

Biological resistance4mm screen in cowl excludes large insects.

Thermal insulationThe upstand and double/triple-skin glazinggive good thermal insulation and minimisethe risk of condensation. Our TechnicalDepartment can provide computercalculations of U-values for given sizes indifferent roof constructions to comply withBuilding Regulations Part L 2010.

Light transmissionFor daylight areas see dimensions table.Average visible light transmission for 3mmglazing: clear 92%, diffused 85%, and bronze50%. Clear glazing allows the greatestamount of daylighting, making it ideal whenseeking passive solar gain. Diffused glazingdiffuses the light and cuts down shadows andbright spots. Bronze glazing provides a goodcombination of light transmission withgreater control of passive solar gain.


Provide controllableventilation combined withrooflighting by means ofLitevent Airstractventilators. Supplier: Passivent Ltd, North Frith Oasts, Ashes Lane, Hadlow. Kent TN11 9QUTelephone: 01732 850770,Fax: 01732 850949. Email:[email protected]: Passivent Ltd. 2 Brooklands Road, Sale.Cheshire M33 3SSTelephone: 0161 905 5700,Fax: 0161 905 2085.Email:[email protected]

Ventilator to comprisemill finish aluminiumupstand with insulatedcore, aluminium cowl,vents and insect screen.Internal surfaces white.Glazing triple skin /double skin 3mm to 4mmpolycarbonate withventilated air gap inextruded aluminiumframe with mitred andsecret-welded corners.Glazing to have 10-yearpostformed warranty fromthe material sheetsupplier against yellowingand loss of lighttransmission, and forimpact resistance.*Glazing frame polyesterpowder coated, colour .... Glazing clear/diffused/bronze*, shape:pyramid/dome*.Ventilator size: ......... (mm)Ventilator to be resistantto soft-body impact of1200 Joules; classed asnon-fragile to HSG 33;internal fire spread ratingClass 1Y, external firespread designation AA.

*Delete as applicable.

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Lining to lightwell (by others)

Insulated aluminium upstand

4mm insect screen

Ventilation door

Weather protectioncowl

Triple or double skinpolycarbonate glazingon aluminium frame

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

2 Brooklands Road, Sale, Cheshire M33 3SS Tel: 0161-905 5700 Fax: 0161-905 2085Email: [email protected] Web: www.passivent.com

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

A member of the Building Product Design Group

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ServicesInstallation and commissioning servicethrough an independent network ofMasterCare Installers.

Extended warranty and maintenancecontracts are available.

Quality assurancePassivent products are designed, developedand manufactured under a BS EN IS0 9001quality management system, giving anindependently audited assurance that theproducts will fulfil their intended purpose.

Operational commitmentAs part of our commitment to minimisingour impact on the environment, and tocontinuous improvement in our methods of operation, Passivent is accredited to IS0 14001 Environmental Management,OHSAS 18001 Health and SafetyManagement, and ISO 9001 QualityManagement Systems.

Other productsPassivent market a range of other ventilationand daylighting products including:

Aircool ventilators for windows, curtainwalling and walls.

Airstract roof terminals for passive stack andother natural ventilation systems.

Airscoop wind-driven ventilation terminals.

Ventilation control systems.

Natural ventilation systems for commercialand domestic buildings.

Solar shading systems.

Background ventilation.

Full range of wall and window vents.

Acoustic ventilation solutions.

passivent natural daylight solutions · 2017-05-22 · passivent natural daylight systems, used as...

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