An exhaust air heat pump uses the heat that is in the building’s ventilation air to heat up the accommodation. The conversion of the ventilation air’s energy to accommodation heating occurs in three different circuits. From the outgoing ventilation air, free heating energy is retrieved from the accommodation and transported to the heat pump. In the refrigerant circuit, the heat pump increases the retrieved heat’s low temperature to a high temperature. In the heating medium circuit, the heat is distributed around the house.
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