PROBLEM TO BE SOLVED: To provide a hot water feeding device which is excellent in a stability of operation a hot water temperature.
SOLUTION: A control means 7 is provided to effect burner switching control such that when a computation fuel feed amount gs to bring feed hot water temperatures tm and to into target hot water temperatures tms and tos is increased to a value higher than an upper limit fuel feed amount at a current operation stage, transfer to an operation stage where the number of operating burners is further increased is effected. Further, a control means 7 is provided to executer burner switching control by which transfer to an operation stage where the number of operating burners is further decreased is effected when a computation fuel feed amount gs is decreased to a value lower than a lower limit fuel feed amount at a present operation stage. The control means 7 executes fuel valve control through which an operation amount C to a fuel valve 14 is adjusted according to set relative relations L1-L3 at each of the operation stages of the operation amount C and a computation fuel feed amount gs. In this constitution, the control means 7 is constituted that when within a set time T2 from a point of time when an operation stage is transferred to the side of increasing the number of working burners, a detected temperature to of a feed hot water Wo is increased to a high temperature higher than a target hot water temperature tos by an allowable temperature difference Δt or more, the set relative relations L2 and L3 at the operation stage are corrected to the fuel decrease operation side.
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