An exhaust air heat pump (EAHP) transfers heat from a ventilation system to warm air that heats your home. The heat can also be used to heat water stored in a hot water cylinder for your hot taps, showers and baths.
An EAHP boosts the heat the mechanical ventilation heat recovery (MVHR) unit extracts from the warm, stale air, so that rather than simply saving energy, the ducting system can be used to heat the building using warm air. This removes the need to install a wet central heating system using radiators or underfloor heating, which can save a lot of money.
For further information on how a heat pump works, see our in depth guide to heat pumps.