Domestic & Commercial Ventilation Systems - Polypipe

Whole HouseBathroomKitchenUtility RoomShowerToiletUNDERSTANDING DUCTINGPERFORMANCE FIGURESSystem 100(110 x 54mm)Particularly suitable for applications requiringlower extraction rates, such as the ventilation ofdomestic bathrooms and internal toilets. Providesefficient ducting for short simple runs.Cooker hoods up to 250m 3 /hrSupertube 125(204 x 60mm)Ideal for the ducting of kitchen cooker hoods andfans with 100, 125 and 150mm round exhaustspigots. Highly efficient even for long runs andwith appliances of a high extraction rate.Cooker hoods up to 500m 3 /hrMegaDuct 220(220 x 90mm)Ideal for the ducting of kitchen cooker hoods,especially with 150mm exhaust spigots - can alsobe connected to 100 and 125mm spigots. Thishighly efficient rectangular duct has comparableairflow performance to a 150mm round duct butwith a lower profile.Cooker hoods up to 1000m 3 /hrPolyVent 225(234 x 29mm)Ideal for the ducting of bathrooms and toiletswhere space is very restricted. It is easily concealedand is an effective choice if other systems cannotbe fitted.PolyVent 300(308 x 29mm)Ideal for the ducting of bathrooms, toilets andkitchens where space is very restricted. It is easilyconcealed and is an effective choice if othersystems cannot be fitted.Cooker hoods up to 250m 3 /hrEasiPipe(100, 125 & 150mm)A round pipe is the most efficient airflow conduitas minimum air turbulence occurs. Consequently,EasiPipe is ideal for larger fans, cooker hoods,whole house ventilation systems, stack ventilationand air conditioning systems.100mm - Cooker hoods up to 400m 3 /hr125mm - Cooker hoods up to 500m 3 /hr150mm - Cooker hoods up to 1000m 3 /hrThermaPipe(100, 125 & 150mm)ThermaPipe is an insulated pipe system that is‘ready to install’, providing excellent protectionagainst condensation and enabling a high level oftemperature control to be achieved.Suitable for whole house ventilation, passive stackand air conditioning systems.100mm - Cooker hoods up to 400m 3 /hr125mm - Cooker hoods up to 500m 3 /hr150mm - Cooker hoods up to 1000m 3 /hrThe performance of the fan is dependent on theperformance capability of the fan itself, the size ofthe duct, the ducting configuration and the type ofwall terminal installed.Each ducting run can be planned in advanceand its performance levels evaluated so it can beascertained if the desired installation will meet therequired level.Technical data is available for the extractor fan/cooker hood installer or system designer in orderto achieve the optimum overall extraction rate. Thisdata highlights how much pressure (measured inPascals) is generated in the ducting run and willshow if the required airflow rate can be achieved.The diagram above shows a typical pressureflowratecurve for an extractor fan or cooker hood(flow rate information should be available from thefan/cooker hood manufacturer). The informationit contains is obtained by a series of laboratorymeasurements starting with free flow at zeropressure, then, by steadily increasing the pressurethat the fan has to operate against, the volumeflow and pressure at each point is derived in orderto plot the curve.7