Mechanical extraction ventilation (MEV) can give precise, controlled, air extraction. It can take moisture and polluted air from area such as toilets, bathrooms, kitchens and utility rooms and vent it to the external atmosphere.
Depending upon the building design and system requirements it can feature either a single unit extracting internal air through ducts from a number of wet rooms or it can have a separate fan running at a faster continuous extract rate in several locations in the house. When mechanical ventilation is combined with heat recovery to give MVHR - mechanical ventilation with heat recovery - it also gives excellent energy conservation. As much as 90 per cent of the heat in the air being expelled from the building can be recovered to warm the fresh incoming air, with obvious benefits in terms of reduced energy demands and therefore lower fuel bills. Typically fuel bills lower by 5% and up to 10% on E.S.T. Best Practice (3 air tightness).
MD Energy heat recovery systems are guaranteed for a period of 5 years of operational use.