To provide a hot water storage type hot water supplier capable of reducing hot water quantity discharged when it is not used for a long period of time.
A control unit 11 receives a hot-water-use-plan input by a user of the hot water supplier 1 from a remote controller 12. At a predetermined time at night, the control unit 11 calculates remaining hot water quantity in a hot water tank 3 by acquiring water level data in the hot water tank 3 with water level sensors 10A to 10C and calculates required additional hot water quantity by reducing the remaining hot water quantity from a hot water quantity setting data set for the day after. Then, the control unit 11 outputs an operation command to a heat pump unit 2 based on the additional hot water quantity.
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai