Exterior case for hot water unit

An exterior case for a hot water unit used for accommodating a hot water device for hot water production or hot water storage therein,

• wherein the exterior case comprises an exterior case main body having an opening and a cover body that is attached to the exterior case main body to block the opening,
• the cover body has a multi-layer structure including a metal plate, and a front side paint layer laminated on a front surface of the metal plate,
• the cover body comprises an ink jet printing layer that is laminated and provided on the front side paint layer, and the ink jet printing layer represents at least one of letters, symbols, figures, and patterns,
• the cover body includes an outer peripheral flange part and a bulging part that is surrounded by the outer peripheral flange part, and a peripheral wall of the bulging part constitutes a drawing part, and
• a plate thickness of the metal plate of a part of the drawn part is thinner than that of other parts of the drawn part, and a thickness of the ink jet printing layer at the part of the drawn part is thinner than that of the other parts, wherein the thickness of the metal plate of the part of the drawn part is a thickness of a corner of the peripheral wall of the bulging part.