The air-water heat pump uses ambient air as a heat source. The great advantages of this system are its simplicity and effectiveness - air is simply sucked into the system and its heat utilised. This simplicity also makes it cheaper than many other heat pump systems.

How it works:

Ambient air is sucked into a heat exchanger which converts low temperature warmth into high temperature heat, even in winter at temperatures of well below 0°C. This is done via a cyclic process of constant change - evaporation, compression, liquefaction and expansion (a refrigerator operates on the same principle). An under-floor heating system can also be powered by this system.