The air-to-water heat pump utilises the outside air as an energy source and reliably supplies the building's heating system with heat. It is one of the most frequently used heat pump technologies in new builds and renovations. Air-to-water heat pumps extract thermal energy from the outside air, even at low outside temperatures, and transfer it to the heating water, which is distributed in the rooms via radiators or underfloor heating.
A fan draws in the outside air, which transfers heat via an evaporator to a refrigerant, which vaporises in the process. A compressor increases the temperature of the refrigerant before the energy is transferred to the heating water. The refrigerant then liquefies again and the cycle begins anew. In this way, heat can be reliably recovered even at low outside temperatures.
