| 摘要 |
PROBLEM TO BE SOLVED: To obtain a water heater for efficiently heating bathtub water even lay providing no heat insulation heater in exclusive use for the water. SOLUTION: In the water heater comprising a hot water storage tank 1 having upper and lower heaters 2, 3, a mixing means 6 for mixing hot water with water of the tank 1, and a circulating passage 12 provided between the means 6 and a bathtub 14 for performing hot water filling function with heat insulating function, a part of the passage 12 is passed through an upper part in the tank 1 to heat exchange hot water in the passage 12 with hot water in the tank 1. |
