Abstract: A heat exchanger arrangement is given comprising a heat exchanger (7), the heat exchanger (7) having a primary side connectable to a fluid circulation system and a secondary side exposed to a gas (13). This heat exchanger arrangement should be operated with little energy consumption. To this end the secondary side is connected to a duct (14) extending downwardly in the direction of gravity, when the duct (14) is connected to a cold side heat exchanger (7), and upwardly, when the duct is connected to a warm side heat exchanger.