Installing a fan in a ceilingįirst check that there are no joists, pipes or cables above the area where the fan will be located.ĭucting must be used when steam and or condensation are likely to occur, unless venting directly to the outside. Horizontal ducts should fall away from the fan unit. Vertical ducts should be fitted with a condensation trap and a weather proof cowl of sufficient free area for the air volume. Ducted Applicationsĭucts passing through an unheated roof void should be insulated to minimise condensate formation and must include a condensation trap and a means of running off condensate. Bearings should be oiled where appropriate twice a year, unless stated otherwise. All fans should be regularly cleaned and checked, (every month or so, dependent on usage). Make sure that grilles, motor cooling ports and impellers are able to function freely in accordance with guarantee requirements.Įlectrical equipment should be isolated before carrying out any maintenance or cleaning. Site the fan so that it is accessible for regular periodic cleaning and servicing. A short circuit of airflow will be avoided by siting units as far away as practicable from the main source of air replacement. In large rooms the extract points should be well and safely distributed to obtain even ventilation in all areas. Do not sight in areas containing excessive levels of grease without suitable filters. Ventilation units should be placed as high as possible in the window or wall near any local smells and steam but not directly above eye level grills, cookers or direct sources of heat in excess of +40☌. In certain circumstances, such as in toilets, a timer is incorporated to provide an automatic run-on period of 15 minutes as stipulated in The Building Regulations. Stale air is also removed by installing the appropriate TLC fan. (Safety Extra Low Voltage) fans are specifically designed for the safe ventilation of toilets, bathrooms and shower rooms and can be fitted within the splash area with absolutely no risk of electric shock. IEE Regulations (U.K.) require that a conventional mains voltage fan in a bathroom or shower must be located where it cannot be touched by a person using the bath or shower and well away from any water spray.Īlternatively, the new TLC range of 12 volt S.E.L.V. If the room contains a fuel burning device (such as a gas boiler) with a non-balanced flue, it is essential that there is enough replacement air to prevent fumes being drawn down the flue when the fan is extracting to its utmost capacity. It should be located as high as possible in the window or wall nearest to smells or steam, but not directly above eye-level grills or cooker hoods. Please drop us a line if you have any specialist requirements.A fan should always be sited in the furthest window or wall from the main source of air replacement to avoid short-circuiting the airflow. If you have access to roof space, an inline extractor fan system would be quieter and more efficient. The silent fans are particularly popular. Units with integral or inline back draft dampers stop drafts coming back down the ducting and prevent condensation build up within the system.īathroom extractor fans generally need to extract between 10 and 20 times the volume of the area of the room it is applied every hour, depending on use, i.e a 12m3 bathroom / shower area would require an airflow of 120m3/hr to 240m3/hr. Use a centrifugal bathroom fan if your duct run is longer than a 1.5 mtr and up to 12 mtr, although they are physically larger this type of fan motor offer greater pressure. Bathroom Extractor Fans, quiet fans for wall, ceiling and window mounting, high airflow low dB shower fan options, intermittent or constant extraction available on 230V or SELV Low voltage.īathroom fans of axial type are suitable for mounting through the wall and in the ceiling if using a very short duct run.
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