To provide a combustion device in which the boiling of hot water on the side of a heat exchanger for hot water feed can be restrained at the time of combustion for the reheating of bathtub water alone and in which reheating combustion can also be performed sufficiently.
Pipe passages 23 for heating and hot water feed, which are pipe passages of water to be heated for hot water feed, are provided and formed vertically in plural stages, and a pipe passage 22 for reheating hot water in a bathtub is provided on an upside of a pipe passage 23a in the lowermost stage of the pipe passages 23 in a contact state. The pipe passage 22 for reheating and the pipe passages 23 for heating and hot water feed are provided so as to penetrate through a plurality of finned plates 25 disposed at intervals from one another, and the finned plates 25 are provided so as to vertically project outside the pipe passage 22 for reheating and the pipe passages 23 for heating and hot water feed. Finned plates 25a disposed for every other finned plate among the plural finned plates 25 are formed in such a manner that a lower side of each of the finned plates 25a is cut within the pipe passage 23a in the lowermost stage of the pipe passages 23 for heating and hot water feed.
KONDO MASATO
MUNETA YOSHIHIRO
EDA AKITO
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