Information on Product Terms


Axial and Centrifugal Fans Axial Fans are suitable for wall, window and roof applications where they can extract directly to the outside. Centrifugal Fans are pressure developing fans, capable of overcoming the resistance encountered in a ducted system. This is particularly useful in applications such as internal toilets, bathrooms or washrooms where there is no direct access to the outside.


	Condensation Control Fans... are designed to alleviate condensation problems in kitchens and bathrooms whether domestic or commercial. Not only is condensation unhealthy, but it can also cause structural damage by encouraging mould, wood rot, damp and decor deterioration. Always check that any apparent problems are caused by condensation and are not the result of another form of dampness i.e. rising damp or rain penetration



Bathroom Fans operating on 12 Volts These fans operate on 12v, supplied by a transformer fitted outside the bathroom. Bath and shower rooms are areas of increased electrical hazard. When fitting ventilation products in Zones 1 and 2 of a bath or shower room, an ingress protection rating of IPX4 is required, in accordance with the requirements of the IEE Wiring Regulations (16th Edition) and BS7671:2001. Zone 1 may best be described as the area immediately bounded by your bath or shower cubicle to a height of 2.25m, whilst Zone 2 is best described as the area extending 0.60m from the extremities of your bath or shower cubicle, also to a height of 2.25m. However, for clarification of these terms and the requirements applicable for your particular installation, you should consult the classification of zones in BS7671:2001 as highlighted in the Xpelair catalogue. The particular page in question is available in pdf format by checking the link.


Inline or Duct Fans... are installed 'inline' within a run of duct or hose and can be supplied with or without a delay or overrun timer.



Timer, PIR Sensor and Humidity Fans Timer fans are supplied with a delay timer that keeps the fan operating for a set period, for example once lights have been turned off in a toilet or bathroom. PIR Sensor Fans are operated by detecting the presence of body heat in a room and are generally supplied with a delay timer. Humidity Fans are operated automatically by a sensor generally adjustable between 50 - 90% RH


SELV... or Safety Extra Low Voltage - generally 12v 50Hz AC - for use in Zone 1 and Zone 2 areas of bathrooms, shower rooms and other relevant areas where electrical safety is of concern



Click Image	Wholehouse ventilation... Wholehouse or central extract ventilation systems are designed to provide continuous ventilation of domestic dwellings and will provide sufficient performance to extract air from a combination of kitchens, bathrooms, utility rooms, ensuites and WC's via ducting. Wholehouse systems run continually at low level switching to boost mode to clear steam and condensation etc during cooking or after showers etc



Heat Recovery ventilation... Heat Recovery Ventilation Systems provide continuous air change, replacing stale moisture laden air with warmed fresh air from outside. They provide an effective solution to stale or musty indoor air together with condensation and mould growth problems. Wholehouse heat recovery systems run continually at low level switching to boost mode to clear steam and condensation etc during cooking or after showers etc Of particular interest to architects, consultants and builders wishing to achieve Levels 3, 4, 5 & 6 of *The Code for Sustainable Homes.*		Click Image



Click Image	Single Room Heat Recovery Single Room Heat Recovery Units are available for use in most domestic and commercial applications including bathrooms, bedrooms, kitchens, toilets, wet rooms etc. Larger units designed for continuous operation in function rooms, swimming pools, offices, classrooms, computer rooms and health & leisure facilities



Positive pressure ventilation These units are generally loft mounted and are designed to create a slight positive pressure which forces air laden with moisture and contaminants out of the household through natural leakage points. The unit is left permanently switched on, dependent on temperature, ensuring continual air quality control. Management of air quality ensures better control of damp, condensation, mould and odours. It helps stop deterioration of the living environment and the fabric of buildings. Above all, it improves the quality of life.