Patent ID: 6497200
Filing Date: 2002-12-24
Classification: F23D,F23N,F24H,Y10S

Abstract:
Fuel-fired heating apparatus comprising:a combustion chamber thermally communicatable with a fluid to be heated; a burner structure associated with said combustion chamber and operative to receive fuel from a source thereof; a wall structure defining a flow path through which combustion air may flow into said combustion chamber for mixture and combustion with fuel received by said burner structure to create hot combustion products within said combustion chamber; and a combustion air shutoff system operative to sense the temperature in said combustion chamber and responsively prevent combustion air supply to said combustion chamber via said flow path in response to said temperature reaching a level correlated to and indicative of a predetermined, undesirably high concentration of carbon monoxide present in said combustion chamber and created by a reduction in the quantity of combustion air entering said combustion chamber via said flow path.