Air Source Heat Pumps are typically installed on the outside wall of a building, they make a hugely efficient alternative to traditional heating systems, lowering the number of fossil fuels burnt to heat your home and domestic water supply. ASHP’s generate heat by utilising the ambient outside air temperature. ASHP’s use a system involving a refrigerant, condenser and compressor to increase the outside air temperature to usually 70-80 Celcius and then transfers this heat to your home through your heating system, radiators, underfloor heating system, hot air vent system and also to your hot water storage cylinder!