| 摘要 |
To provide a water heating apparatus capable of performing efficient operation or operation keeping comfort of a user depending on situations, provided is a water heating apparatus, including: a heat source circuit including a first circulation pump 101, a heat pump 100, and a heat source side of a hot water supply tank heat exchanger 105 that are connected to each other by a pipe, the heat source circuit being configured to allow water to circulate therethrough; a hot water supply circuit including a second circulation pump 102, a use side of the hot water supply tank-use heat exchanger 105, and a hot water supply tank 104 that are connected to each other by a pipe, the hot water supply circuit being configured to allow water to circulate therethrough; and a control unit configured to: compare a hot water supply tank temperature and a reheating tank temperature with each other; and perform, when the hot water supply tank temperature falls below the reheating tank temperature, reheating so that the hot water supply tank temperature becomes a target tank temperature, and control a flow rate of the second circulation pump based on change in temperature in the hot water supply tank. |
