Balancing air device for a heating unit

Stoves and furnaces – Hot-air furnaces – Feeding air

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Details

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.

REFERENCES:
patent: 455542 (1891-07-01), Emerson
patent: 519325 (1894-05-01), Davids
patent: 533287 (1895-01-01), French
patent: 767636 (1904-08-01), Dietz
patent: 1630317 (1927-05-01), Skonier
patent: 1752663 (1930-04-01), Fagan
patent: 3119604 (1964-01-01), Biber et al.
patent: 3913501 (1975-10-01), Dahar
patent: 4033269 (1977-07-01), Little et al.
patent: 4038963 (1977-08-01), Dingwall
patent: 4121562 (1978-10-01), Grott
patent: 4171089 (1979-10-01), Schossow
patent: 4194488 (1980-03-01), Bellaff

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