Patent attributes
A hot water supply system having a hot water supply system body. An operation box is inserted into a window opened in a front panel of the hot water supply system body, and a box cover having an opening to which an operation unit in a front center region of the operation box is fitted is mounted onto a front surface of the operation box. The box cover overhangs to an outside of an outline of the operation box and has a size making it possible to cover a gap between the operation box and the window from the front. A dent sized to corresponding to a size of the box cover is formed on a portion of the front panel, which includes a spot where the window is opened, and a backside corner portion of an outer edge of the box cover enters into the dent portion.