Water heating device

The utility model provides a water heating device which can solve the problem of temperature rise and prevent water from invading. The water heating device comprises: a housing comprising a box-shaped housing body and a front plate disposed on the front surface; the air supply and exhaust pipe forms a double pipeline by an air supply part and an exhaust part; the fan is arranged in the shell; an air supply duct disposed in the housing and connecting the air supply portion of the air supply and exhaust pipe and the fan; and a component to be cooled disposed within the housing, in which a rear surface portion vent hole is provided in a rear surface portion of the housing, a bottom surface portion vent hole is provided in a bottom surface portion of the housing, the component to be cooled is disposed at a position included in a space from the bottom surface portion vent hole toward the rear surface portion vent hole, and the component to be cooled is disposed at a position included in a space from the bottom sur