Control unit with separate dampers for make-up and combustion ai

Details Control unit with separate dampers for make-up and combustion ai Control unit with separate dampers for make-up and combustion ai

1984-05-07

1985-02-12

Bennett, Henry

Heating systems

Air

Furnace

98 37, 98119, 126 85B, 126112, F24D 500

Patent

active

044986246

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 air inlets, respectively, and a screen extending across the openings. The baffle includes a damper in the make-up air inlet and a damper in the combustion air inlet. The dampers are mounted on a common shaft so that they move concurrently in response to a pressure differential between the inside and outside.

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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