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CI/SfB (57)Uniclass L7513July 2014

VENTILATION DESIGNEDFOR CARE HOMES

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Ventilation in care homes provides goodindoor air quality for residents, staff andvisitors. A ventilation system designed tosuit different environments within the carehome will provide fresh air, removepollutants (humidity, odours, CO2 emissionsetc.) and prevent condensation risk andmould growth.

Care homes owners constantly strive toprovide premises that are clean, hygienic andfree from offensive odours providing adignity of care to their residents.

Passivent ventilation systems designedspecifically for care homes offer tailoredsolutions to meet the needs of individualrooms or spaces. Our fully trained in-housedesign team offer a full technical designservice to suit building regulations andbudget.

Contents

Ventilation designed for Care Homes 3

Passivent iMEV Intelligent Mechanical Extract Ventilation 4

Fans 5

Air extracts 6

Ducting, Terminals and Fresh air supply 7

Further information 8

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Key issues for Care Homes● Care homes are occupied 24 hours a day,

7 days a week. A continuous demandcontrolled ventilation system is suited tothis type of environment. Passivent carehome ventilation systems are energyefficient coupled with low initial cost andlower life time running costs.

● Rooms within a care home have differentprinciple pollutants. Humidity in somerooms and odours in others. Passiventventilation systems are designed to suitthe relevant pollutant in each roomwhether this is humidity or odour related.

● Rooms are occupied for different lengthsand times across the 24 hours.Automatic demand control ventilation issuited to this type of environment as itremoves the need for occupantinteraction, automatically switching onwhen and where required detecting risesin pollutants and responding accordingly.Passivent ventilation systems are effectiveand energy efficient.

● In care homes, as little occupant input aspossible is required. Intermittentextraction that relies on an occupier is notideal as research has shown there is oftena risk of insufficient ventilation or overventilation increasing energy costs. Oftenthe ventilation is not sufficient to reducehumidity and maintain levels below the70% target for prolonged periods.Passivent ‘intelligent’ ventilation systemsremove the need for occupier interaction.

● Ventilation systems are required to bequiet to reduce disturbance. At night with low demand, the fan speedreduces meaning less noise and thereforeless disturbance. Passivent constantlyrunning low power fans are discrete andenergy efficient.

Important factors for a Care Homeventilation solution include

● Good indoor air quality providing fresh air all year round

● Maintaining relative humidity below 70%to control condensation

● Effectively removing pollutants

Regulations and Requirements includeBuilding Regulations Approved DocumentF1: Means of Ventilation BuildingRegulations covering ventilation of domesticand non-domestic dwellings‘Communal residential properties arebuildings containing separate residentialunits with some degree of communalfacilities.’

CIBSE Guide B2: Ventilation and AirConditioning

Good Practice Guide 192: Designing energyefficient multi-residential buildings

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Passivent intelligent Mechanical ExtractVentilation (iMEV) is the intelligentventilation system that caters for multi-occupancy care homes where individualrooms and areas require different extractionrates. Passivent iMEV is intelligent in that itremoves the need for occupant interaction,automatically increasing extraction whenand where required.

Passivent iMEV care home system works bydrawing polluted air (moisture laden, odoursetc.) via air extracts located in ‘wet’ rooms(en-suite bathrooms, kitchens etc.) using acentral fan and exhausting this air throughducting to roof-mounted terminals.

To ensure the polluted air is replaced,through-wall or window vents allow fresh airfrom outside to enter. These vents aretypically placed within habitable rooms suchbedrooms and living areas.

This cycle of stale air out and fresh air inensures good indoor air quality and a freshclean environment. Importantly, it alsoremoves moisture which can otherwise leadto damp and mould.

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WET Bathroom

WET Kitchen/Servery

DRY Bedroom

WET Bathroom

DRY Bedroom

DRYLounge

Air circulationprovides whole-house

ventilation

Extract fan in roof space or cupboard,varying speed on demand

FAN

Fresh air inlets in habitable/dry rooms Humidity-sensitiveextract in wet roomsadjust to meet roomdemand

Passivent iMEV automatically detects rises in humidity and responds accordingly. The system only increases extraction whenrequired, so it uses much less energy as thecentral fan is not running at a higher speedunnecessarily. Heat loss is also reduced asiMEV relies on demand control (extractionwhen and where required), extraction is only increased in the areas where humidityhas risen.

Constant pressure systemWith a constant pressure fan, automaticcontrol of the humidity sensitive extractssituated in wet rooms (eg en-suitebathrooms) and a fan pressure sensormaintains the overall system pressure. This increases extraction in the areas whererequired, whilst keeping a sufficient level ofventilation in other rooms. At night timewhen there is low humidity and low demand the fan speed reduces to the quietest minimum setting.

A Constant Pressure system is ideally suited to provide effective ventilation forcare homes.

Energy savings

All Passivent iMEV

care home systems use

constantly running

low-power fans which

reduce energy bills and

the carbon footprint of

the building.

Demand control

Systems automatically

respond to the need for

ventilation, increasing

effectiveness and

energy efficiency.

Complete solutions

Every Passivent iMEV

care home system

provides a complete

ventilation solution

which is individually

tailored to a particular

project by our expert

design team.

BENEFITS

● Automatic control maintainseffective ventilation throughoutthe care home.

● Quiet fan that reduces speed atnight to eliminate occupantdisturbance.

● Designed to maintain relativehumidity below 70% in wetrooms.

● Designed to combat odours.

● Minimises heat loss as onlyextracts air as and when required,32% energy saving.

● Low running costs.

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Exhaust terminal

125mm rigid ducting

A151DC W CP Fan

Humidity-sensitiveextract

VENTILATION DESIGNED FOR CARE HOMES

FANS

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A151DC E FanCapacity: 350m3/hr @ 120Pa

The A151DC E fan incorporates one of thelowest energy motors on the market, despiteit being one of the most powerful. It can becommissioned as fixed speed or with amanual boost control that can be easilycommissioned during installation.Controller options are either a three-positionswitch or remote radio frequency controllerwith three settings: low, medium and boost,as well as a timer, meaning the occupant hasfull control of the ventilation in the home.

It is important tochoose the right fanfor a project. The descriptionsshown indicate themain uses for each fantype, but Passivent canadvise on the mostsuitable for any givenproject.

A151DC W CP Fan Capacity: 350m3/hr @ 120Pa

The A151DC W CP fan is perfect for large multi-residential properties which requireindividual areas to be monitored andventilated separately, without the need foroccupant involvement. The constantpressure version is designed to be used withhumidity-sensitive extracts as part of aPassivent iMEV care home system.

Its compact size and range of fixing positionsmeans it can be concealed within a roof orcupboard space, with one fan servingmultiple dwellings. This fan is especiallyuseful for care homes and other multi-occupancy residential properties whereextraction may need to increase in differentareas at different times, without affectingother areas where additional ventilation isnot required.

Key features● To further enhance occupier

comfort, the fan is fitted withan internal silencer, reducingmechanical noise andallowing the fan to be placedwithin a cupboard space nearhabitable rooms.

● The A151DC E is eligible forenergy use calculations under Appendix Qof SAP (Standard Assessment Procedurefor Energy Rating of Dwellings) and has aSpecific Fan Power as low as 0.17W/l/s.

Key features● Energy efficient.

● Can be mounted in variousdifferent profiles eg on thefloor, wall or ceiling.

● Spigot orientation can bechanged for versatileinstallation possibilities.

● Fan blade orientation improvesacoustic performance andreduces air resistance whichincreases longevity.

● Constant pressure version features amalfunction warning light to easilyidentify issues with individual units whenmultiple fans are used. Good for carehomes where multiple fan units may beclustered together.

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Model Airflow performance (m³/hr) @ 80Pa Typical applicationsNormal Boost

A121 15 - 75 - Bathroom, kitchen/utilityA133 20 - 75 30 mins @ 150 Bathroom, kitchen/utility

A141E 25 30 mins @ 90 Bathroom, kitchenA142E 25 30 mins @ 120 Bathroom, kitchen/utility

A141PIR 15 30 mins @ 65 Bathroom, kitchen/utilityA141PIRWC 15 30 mins @ 30 WC

A141/15 15 - StoreA141/30 30 - WCA141/45 45 - WCA141/60 60 - Bathroom, kitchen

A132 Use with A133, A141E, A142E

VENTILATION DESIGNED FOR CARE HOMES

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Automatic humidity-sensitive, some withswitched boostUsed to provide fully automatic extractionbased on humidity levels within wet rooms(kitchens and bathrooms). Can also be boostedby the user if additional extraction is required(switch located in the vicinity causes extract toopen further, increasing the level of extraction).Suitable for use within residential and caremulti-occupancy buildings where individualusers may be unable to control the systemeffectively.

Constant volume with switched boostThe A141E is particularly suited as part of aventilation solution whereby a constant level ofventilation required is for the majority of thetime, whilst still offering occupants the optionto boost ventilation.

Constant volume with passive infra-red boostProvides constant extraction at a relatively lowlevel but boosts automatically for 30 minutesupon detecting a presence within the room.This has the added advantages withinbathrooms as it can be used to tackle odour as well as humidity.

Constant volumeExtract is set at a constant level so extraction is always the same. Increased extraction isregulated by fan speed rather than the extractitself. Suitable for when similar levels ofextraction are always required (kitchens, store rooms).

Boost switchConstant boost switch

Passivent have a wide range of extractoptions available for use in the differentapplications. They are located in wet roomssuch as bathrooms, WCs and kitchens.

Each extract provides a level of control thatis suitable for the room and activity at anytime. Each room has different requirementsfrom the ventilation system; Passiventprovides a truly adaptive solution for each.

For example, a WC is notpermanently occupied and sodoes not need such a highlevel of permanent extraction.However, once occupied aboost rate is required.

Extract type

Terminal Duct/spigot dia Air flow performance

Tile TT13 150mm 50m³/hr at 0.3Pa

100m³/hr at 1.0Pa

200m³/hr at 4.2Pa

300m³/hr at 9.5Pa

500m³/hr at 27.4Pa

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VENTILATION DESIGNED FOR CARE HOMES

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DUCTING

Plastic rigid and semi-rigid circular ductingPlastic rigid circular ducting can be used toconnect all parts of a Passivent care homesystem including air extract to fan and fan toroof terminals. Available with a number ofdifferent connection pieces to navigatedifferent project layouts. Insulation isavailable to prevent heat loss, condensationand provide resistance to fire. Semi-rigidcircular ducting is also available from the airextract to the fan for ease of installation.

Plastic rigid flat channel ductingPlastic rigid flat channel ducting is suitablefor extraction from wet rooms such asbathrooms and kitchens. Its low profileenables ducting to be concealed. The varioustypes of ducting available mean that it caneasily be incorporated into different types ofproject.

TERMINALS

Exhaust air terminalA tile terminal is designed to blend withmost available manufacturers’ roof tiles, andwill weather to match the surrounding tilesover time. It is AA fire rated to BS 476: Part 3.

Wall terminals are also available.

FRESH AIR SUPPLYWhen using Passivent iMEV care homesystems, fresh air vents must be provided toreplace the extracted air. Inlet vents areusually located within habitable rooms suchas bedrooms and living rooms.

Passivent have various inlet vent optionsavailable to provide sufficient levels ofbackground air but at the same time ensurethat residents’ comfort is maintained.

Window VentsWindow Vents are incorporated within thewindow or the frame. There are various typesavailable with different controls, frommanual cord operated units to fullyautomatic humidity sensitive versions.

The units are usually installed by the windowmanufacturer at the time of making the windows. Each is designed to ensure thatairflow is not directed into the centre of theroom which residents mainly occupy, but isdirected upwards, reducing the effect ofdraughts.

There are acoustic options including eithermanual or automatic control. These can givesound reduction of up to 42dB providing aquieter, peaceful living environment.

Wall VentsA range of through-wall vents can be usedwhere it is not possible or desirable to fit awindow vent or where a greater control offresh air supply is required.

Wall vents are infinitely adjustable betweenopen and closed, so allow close control ofhow much air is allowed in.

Humidity-sensitive options are availablewhere manual control is not required. Theacoustic range can provide substantial soundreduction of up to 55dB.

FURTHER INFORMATION

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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

ServicesPassivent has its own in-house researchteam dedicated to developing techniques andproducts for natural ventilation, and is aleading 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.

InstallationInstallation and commissioning servicethrough an independent network ofPassivent MasterCare installers. Extendeddesign warranty available throughMasterCare.

Names of approved installers can be providedon request.

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

EnvironmentPassivent conducts all business processesunder a BS EN ISO 14001 qualitymanagement system, giving an assurancethat all activities are carried out havingminimal impact upon the environment.

Other productsPassivent market a range of other ventilationand daylighting products for commercial anddomestic buildings including:

Natural (passive) ventilation systems

Mixed mode cooling systems

Aircool ventilators for windows, curtainwalling and walls

Airstract roof terminals for passive stack andother natural ventilation systems

Airscoop wind-driven ventilation terminals

Natural daylighting systems includingSunscoop tubular rooflights and Metrodomerooflights