Stoves and furnaces – Hot-air furnaces – Feeding air
Patent
1979-09-28
1981-08-25
O'Connor, Daniel J.
Stoves and furnaces
Hot-air furnaces
Feeding air
110160, 126 85B, 126312, 432 72, F24H 300, F23J 1100
Patent
active
042853257
ABSTRACT:
A balancing air device for a heating unit in a building having a flue for the passage of waste combustion gases from a combustion chamber of the heating unit into a stack capable of having a draft flowing therein, comprising, a fresh outside air line connected to the combustion chamber of the heating unit for supplying air from outside the building and an air return line connected directly between the outside fresh air line and the stack for returning air supplied from outside the building to the stack when the heating unit is not operating. The cross-sectional flow areas of the outside fresh air line extending to the combustion chamber and the air return line are chosen so that, when the heating unit is not operating, the air return line satisfies a substantially constant draft flowing in the stack so that fresh outside air is not supplied to the combustion chamber when the heating unit is not operated.
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patent: 4038963 (1977-08-01), Dingwall
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patent: 4171089 (1979-10-01), Schossow
patent: 4194488 (1980-03-01), Bellaff
O'Connor Daniel J.
Weaver William W.
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