Water heater with normally closed air inlet damper

Details Water heater with normally closed air inlet damper Water heater with normally closed air inlet damper

F - Mech Eng,Light,Heat,Weapons

24

H

F24H 9/20 (2006.01) F23L 1/00 (2006.01) F23L 13/00 (2006.01)

Patent

CA 2500941

A fuel-fired, power vented water heater has a combustion chamber with an outer wall portion defined by an arrestor plate in which flame quenching air inlet openings are formed. All combustion air entering the combustion chamber must first pass through an air inlet plenum extending outwardly from the arrestor plate and then pass inwardly through the flame quenching openings into the combustion chamber. The air inlet plenum is provided with a normally closed inlet damper which automatically closes during non-firing periods of the water heater to prevent passage of combustion air (and extraneous flammable vapors, if present, adjacent the water heater) into the combustion chamber, and opens during firing periods of the water heater to permit operative combustion air delivery to the combustion chamber.

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