| 摘要 |
PROBLEM TO BE SOLVED: To provide a water heating device capable of additionally supplying hot water of high temperature to a bathtub without any influence on a hot water supply temperature.SOLUTION: A water heating device includes: hot water supply circuits L12, L31, L32, and 21-24 for supplying hot water of desired temperature from an upper part of a hot water storage tank 3 through a mixing valve 22 for hot water supply; bath hot water supply circuits L33, 25, 26, 27, and 28 which branch off from the hot water supply circuits L12, L31, L32, and 21-24 and are connected to a bathtub 4; and a high-temperature additional hot water supply circuit for additionally supplying hot water of high temperature from the upper part of the hot water storage tank 3 to the bathtub 4. A downstream side of the high-temperature additional hot water supply is connected halfway in the bath hot water supply circuits L33, 25, 26, 27, and 28. |
