JPH05309051

PURPOSE:To take a bath at an arbitrary time, and also, to reduce a running cost by limiting an electric conduction time zone to a heater to the specific time duration by a controller, and also, executing driving control of the heater in order to hold a temperature of hot water in a bathtub at a set temperature, based on an output of a sensor. CONSTITUTION:A remote controller 5 executes driving control of a heater 21, a filtering device 22 and an automatic hot water supply device 3, based on its time and detected value by a water level sensor LS and a temperature sensor TH, by a timer 6. When the time becomes 18 o'clock, the filtering device 22 is switched from a washing state to a backwash state, and at the time point when its backwash water quantity becomes about 50L, the filtering device 22 is returned to the washing state. Subsequently, by driving the automatic hot water supply device 3, a bathtub 1 is filled with hot water. Thereafter, when hot water in the bathtub 1 is consumed before 7 o'clock, the automatic hot water supply device 3 is driven each time, and when the temperature sensor TH detects