| 摘要 |
PURPOSE:To realize the reduction of cost, size and weight by driving a circulating pump for the additional heating of a bath without employing any electric motor. CONSTITUTION:The device is provided with a heating circuit 13, having a circulating pump 6 for heating, a heat exchanger 7 for heating and a hot-water reserving tank 11, and a bath additional heating circuit 20, circulating through a bathtub 14 and an additional heating heat exchanger 18 accommodated in the hot-water reserving tank 11. Further, the device is provided with a bath additional heating circulation pump 28, connecting a fluid-driven impeller 21, provided in the heating circuit 13, with a driven impeller 24, provided in the circulating route of the bath additional heating circuit 20, so as to be capable of transmitting a power. |
