it is a warmwasserger u00e4t, especially a water heater with a casing (110), a geh u00e4usekappe (140), a channel (180) to hold water and a customers (120) for heating the in channel (180) and water is provided. the warmwasserger u00e4t is also a control unit (130) for controlling the function of the customers (120) and the warmwasserger u00e4tes.the control unit (130) is arranged in a first operating mode, the warmwasserger u00e4t (normalbetriebsart) and at least a second mode of operation (desinfektionsbetriebsart) to operate. in the second mode of operation, the operation of the customers so controlled that in the channel (180), the water is heated to at least 70 u00b0c.furthermore, a corresponding procedure is proposed.
