Patent ID: 6216687
Filing Date: 2001-04-17
Classification: F23G,F24B,F24C

Abstract:
A heating appliance, comprising:a firebox having an outlet in communication with a space containing ambient air and within which said appliance is located;a gas burner disposed within said firebox, said gas burner providing a flame and heat source, said flame producing products of combustion, the products of combustion exiting said firebox through said firebox outlet;a catalyst element in communication with said firebox outlet and through which a portion of the products of combustion flow, wherein at least some of the through-flowing products of combustion are catalyzed, the catalyzed products of combustion directed into the space in which said appliance is located, carbon monoxide contained within said products of combustion oxidized by said catalyst element into carbon dioxide; andmeans forming a plenum in fluid communication with the space within which said appliance is located and through which ambient air is conveyed through said appliance, said plenum at least partially surrounding said fire box and having an inlet into which ambient air from the space within which said appliance is located is received, and an outlet which is open to the space within which said appliance is located, the ambient air having been conveyed through said appliance discharged through said plenum outlet into the space in which said appliance is located;wherein the ambient air conveyed through said plenum and the products of combustion are substantially out of fluid communication with each other within said appliance.