Taking heat from the air and heating your house
Air Source Heat Pumps (ASHP) literally heat your house from the air outside. It may sound counter intuitive but just as a fridge extracts heat from the inside, so ASHPs extract the heat from the outside, working to temperatures as low as -15°C (outside).
Using a reverse refrigeration cycle heat is generated and used to heat radiators, underfloor heating systems, warm air convectors as well as domestic hot water (DHW) tanks.
Heat pumps do use electricity but by using the heat that they extract from the ground, air, or water (that is constantly being renewed naturally) they can achieve relatively high COP’s (Coefficient of Performance) which means that, correctly designed, they are very efficient to run.
The environmental impact can be further mitigated by choosing your energy supplier with care.
Depending on system configuration an ASHP can offer a full central heating solution and provide domestic hot water. Most heat pumps can also operate in a cooling mode where the cold refrigerant is moved through the indoor coils to cool the room air.
This renewable heating technology tends to best suit relatively well insulated homes.