A first valve (14) controlled according to the amount of through-flow and a second valve (18) controlled according to the temperature of the water thus drawn off are arranged in a known device in order to connect a heat exchanger (1) in a domestic device (WWW) for drawing off hot water and,optionally, a domestic heating device (2), to a long-distance energy network (FW). Both valves (14, 18) are serially connected between the long-distance energy network (FW) and the primary side of the heat exchanger (1). The secondary side (9) of the heat exchanger (1) is connected to the device (WW) for drawing off hot water . In said serial connection of two valves, the kv value of the valve which is controlled according to temperature constitutes a large part of the overall Kv value, whereby the proportionality range between the temperature and through-flow of the first valve has to be wide enough to achieve stable regulation for small amounts of water drawn off. According to the invention, both valves are connected in parallel. The advantage thus provided is that regulation is stable for small amounts of drawn off water and the proportionality range of the temperature control valve can be smaller than for a serial connection. |