Air Source Heat Pumps perform amazingly well at low temperatures and can still operate at -20^oC, so are brilliant for all-year-round use. For every kilowatt of electricity used by your heat pump, it will produce approximately 3kW of heat energy for your home.

If you want to understand exactly how heat pumps work, all you need to do is stand in front of one. The fan will blow cold air at you because it has extracted all the heat from it – exactly like an air conditioner in reverse.