| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the problems of slow rising of floor heating and insufficient quantity of heat to be radiated when a bathroom floor heater is coupled with the extra firing passage of a hot water supply apparatus for bath, and the problems of increase of load on a circulation pump and deterioration of extra firing efficiency based on the increase of pressure loss in the floor heater. SOLUTION: An extra firing circulation path 6 is provided between the hot water supply apparatus for bath 1 and a bathtub 5 and a bathroom floor heater 10 is coupled in series with the supply side 6a of the circulation path 6. The floor heater 10 is arranged independently with a distribution header 11 and a concentrated header 12 coupled with the supply side 6a of the circulation path 6 and a radiation pipe 17 is coupled between the headers 11, 12. According to the structure, fluid resistance is decreased in the floor heater 10 and the load on an extra firing circulation pump 7 is reduced. Consequently, rising of the floor heater 10 is improved and the extra firing and floor heating efficiency is enhanced significantly.
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