WATER HEATER

PROBLEM TO BE SOLVED: To provide a water heater to supply only hot water or water having temperature at which a user is not provided with uncomfortableness. SOLUTION: A first thermo-sensitive actuating valve 8 to be closed in response to a hot water having temperature higher than a first given temperature and opened in response to hot water or water having temperature lower than the first given temperature, and a second thermo-sensitive actuating valve 9 to be closed in response to water further lower than a second given temperature lower than the first given temperature and opened in response to water or hot water having temperature higher than the second given temperature are arranged in a hot water supply passage 1 situated downstream from a thermo-exchanger 2. This constitution not supplies hot water, having temperature higher that the first given temperature at which there is a fear of uncomfortableness being given to a user and having temperature lower than the second given temperature, to the user as a result of the first and second heat-sensitive actuating valves 8 and 9 being closed. Thus, only hot water or water having temperature lower than the first given temperature and higher than the second given temperature is supplied and the user comfortably uses a water heater.