Patent ID: 6698385
Filing Date: 2004-03-02
Classification: F24H

Abstract:
A shield for gas-fired a combustion chamber of a hot water heater, said hot water heater having an inner casing for the containment of water to be heated by a combustion chamber disposed under said inner casing, a burner and pilot in said combustion chamber, a flue pipe extending from said combustion chamber to evacuate combustion gases, an outer casing secured spaced about said internal casing and insulated therefrom by a thermal insulating material, a support base at a bottom end of said water heater, a skirt about said combustion chamber spaced internally from a lower end portion of said outer casing, air passage means to supply air to said combustion chamber, and a heat shield formed of metal in said combustion chamber encircling and spaced under and to the sides of said burner and pilot, said shield being spaced from said skirt, air aperture means in said shield and disposed under and to the sides of said burner and pilot to permit passage of air supplied through said air passage means; said shield providing heat concentration in said combustion chamber and on a lower heat transfer wall of said inner casing, and reducing heat loss through said skirt and a bottom end of said combustion chamber.