Patent ID: 8117996

Claim:
A water heater comprising: a cylindrical main body; a hot water storage chamber arranged above a mirror plate having a restriction part protruding upwardly; a combustion chamber having an all primary air burner and a burner throat opening provided below the mirror plate; an air inlet that supplies combustion air to said burner provided at a lower part of the combustion chamber; a placing base comprising a solid base support plate and a partition plate, the solid base support plate extending horizontally across the combustion chamber and provided between said burner and said air inlet; the partition plate provided between the air inlet and the solid base support; and a supporting plate positioned above the solid base support and below the burner; an air passage formed by a central opening in the partition plate and said base support and extending in a vertical, horizontal and then vertical flow direction; wherein said burner is positioned in the combustion chamber at a height that protrudes and extends at least partially into a space covered and formed by the mirror plate, combustion air entering through said air inlet continuously flows through said air passage and is supplied to said burner throat of said burner, and the hot water in the hot water storage chamber is heated by combustion occurring in said combustion chamber.