| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively provide a water heater having a complex function such as bathtub warmth retention, floor heating, and instant hot water tapping with a simple configuration. SOLUTION: In the water heater having a hot water storage tank 1 for storing hot water that is heated by a heating part 44, a warmth-retaining circuit 20 for retaining the warmth of a bathtub, heating a floor, or the like is provided, thus enabling hot water for circulating through the warmth-retaining circuit 20 and hot water that is heated by the heating part 44 to exchange heat. |
