Air contamination prevention device

Details Air contamination prevention device Air contamination prevention device

F - Mech Eng,Light,Heat,Weapons

24

F

F24F 13/06 (2006.01) F24F 7/04 (2006.01) F24F 13/10 (2006.01)

Patent

CA 2683240

An air contamination removal device for promoting the removal of combustion products of gas furnaces and gas water heaters, and radon gas from basements of buildings. The device is mounted in a basement wall or window opening and is comprised of a duct, a hood at an entrance end of the duct and a damper assembly at an exit end of the duct. When there is a negative pressure in the basement a damper automatically opens allowing air to be drawn into the basement. A pair of balance weights are mounted on the damper to immediately open the damper when the pressure becomes negative.

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