Heating systems – Air – Furnace
Patent
1983-10-11
1985-04-09
Bennett, Henry
Heating systems
Air
Furnace
98 37, 98 346, 126112, 126 85B, F24D 500
Patent
active
045096813
ABSTRACT:
A control unit for make-up air and combustion air is disclosed for use with a furnace in an air circulating system for a building. A baffle having a combustion air inlet and a make-up air inlet is provided with a weather protective hood and adapted to be mounted on the outside wall of a building. The combustion air inlet is connected through a conduit to a location adjacent the floor of the building on which the furnace is mounted. The baffle includes a restrictor plate including a pair of openings aligned with the combustion air and make-up inlets, respectively, and including a screen extending across the openings. The baffle includes a damper in the make-up air inlet which opens in response to reduced pressure in the furnace return air duct so that the inside pressure tends to be equalized with the outside pressure.
REFERENCES:
patent: 2242802 (1941-05-01), Stramaglia
patent: 3158082 (1964-11-01), Dillingham et al.
patent: 4175538 (1979-11-01), McCarty
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