How does Heat Recovery Ventilation work?
There are two different types of heat recovery system, Whole House Mechanical Ventilation with Heat Recovery (MVHR) and Single Room Heat Recovery (SRHR).
Whole House Heat Recovery is a centralised system, normally located in the loft space of a house. It works using the principles of both supply and extract ventilation. Warm and moisture-laden air is extracted from the bathroom, kitchen, WC and utility room of a property which is drawn into the main system and passes over a heat exchange coil before being ducted outside to atmosphere.
At the same time, fresh air is drawn from outside into the system, collecting up to 90% of the heat from the extracted air as it passes over the heat exchange cell. This fresh, filtered and tempered air is then supplied into the living room areas of the home, the bedrooms, living and dining areas.