<p>A hot water supply device having a host remote controller (27) and a bath remote controller (20) with which a call to the host remote controller (27) can be made using an interphone function. Priorities are assigned to contents of voice guidance performed by a voice guidance function. When a call by the interphone function and an output command by the voice guidance occur at the same time, voice guidance having higher order is prioritized over the call and outputted. Voice guidance having lower order is outputted after the call.</p>
