When determining the method ofventilation and flow rates the requirements of all authorities concerned must be observed. General An electrical product in a bathroom orshoweroom must be situated in accordance with IEE zoning requirements. For additional safety Xpelair LoVolt SELV products operating at 12 volts should be considered. 2.Calculate performance requirement Multiply room volume by the number of air changes appropriate to the room type from the guide architectural table opposite.Example continued: Recommended AirChanges Per Hour for domestic rustic kitchens is 10 to 15. 18m Splash Areas Where a fuel appliance is fitted with a nonbalanced flue, adequate air replacement must be provided to prevent fumes being drawn down the flue when the fan is operating at its maximum performance. Refer to Building Regulations for specific requirements. Exhaust air must not be discharged into a flue used for exhausting fumes from applications supplied with energy other than electricity.Intake modern fans or air replacement grillesshould be sited well away from the flue to ensure that gases are not reintroduced into the building. See Building Regulations. Fuel Burning Appliances Air Replacement

Your guide

A tight fitting door can prevent a fan fromreceiving adequate air replacement. A suitable gap between the underside of the door and the floor finish is usually adequate for design toilets and bathrooms although Xpelair Slimline privacy air transfer grilles furniture are available. For larger extract volumes air replacement should be carefully considered particularly in tightly sealed properties.

to a successful fan installation

Calculate room volume Take measurements in metres. We take the air that surrounds us for granted and yet small changes in for example - air purity, temperature, humidity and velocity -can effect our performance and at worst make us ill. Designing a building ventilation system can in most cases be easily achieved by following the step by step approach described below. However, if the space or the activity is unusual, call in the experts - Xpelairwho will be happy to advise and assist in proposing the most appropriate scheme. Choosing a Ventilation Solution The type of system chosen will bedependant on the application and building layout. A ventilation system requires as even a flow of air across an area as possible. The most cost effective method of achieving this is by extract ventilation with appropriate air replacement provision. In the leisure industry input ventilation ispreferred with air escaping from the premises through doors furniture and other available openings. Many schemes use both extract and intake fans which are often connected to a single control system. For fully automatic operation, a range of sensors are available which will building switch On immediately when required but only when necessary for energy efficiency.1.
3 x 10 ACH - 180m
3 3 3 Multiply: /h, 18m x 15 ACH = 270m /h.Therefore a fan with an extractperformance between 180-270m3is appropriate. NOTE: it is always better to pick a fan at the higher end of the range rather than risk unsatisfactory ventilation. Length x Width x Height = Room m3. 3.Select your fans from the product extract performance table opposite Example continued: selection might be a GX6 product: 266m Example: A domestic kitchen 3m x 2.5m x 2.4m = 18m3
3 /h, DX400 orCF40: 245m
3 /h, Kitchen canopy: 350m Window, wall, contemporary ceiling or roof? For effective operation the extract pointshould be as far away from the source of air replacement - usually the door, and as close to the source of condensation or smells as possible.This usually determines the type of fan(window, wall etc.) If the room has no opening architectural windows then a model fitted with an overrun timer will meet the requirements of the building regulations.For automatic control choose from theconvenience of an optional Xpelair humidity or PIR sensor.
3 /h. Further Considerations 176