A heat pump can extract energy from three sources:
stored solar energy in the air, in the ground and in ground water. The heat extracted from each heat source is transferred by the heat pump to the heating system (e.g. floor heating) via a heat exchanger.
The heat from the source is usually exchanged to a water heating circuit. Therefore we classify the heat pump as air/water, brine/ water or water/water heat pumps. Each of the heat sources contains so much heat that the heat pump circuit process can take place even at low temperatures and still provide sufficient heating energy.
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