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Air, wood and sun provide the heat for a single-family home. Heat pumps are popular in new buildings and renovations. However, it is often overlooked that the efficiency of the air-water heat pump decreases when the outside temperature drops. It is often sensible to supplement the heat pump with a wood-burning stove, which can relieve the load on the heating system on cold days. Speaker: Klaus Leihkamm Publisher: Ulrich Brunner Ofen- und Heiztechnik