Automatic temperature and humidity regulation – Hot-air furnace – Air and fire control
Patent
1989-08-16
1991-08-13
Bennett, Henry A.
Automatic temperature and humidity regulation
Hot-air furnace
Air and fire control
431 21, 431 22, 236 1G, F23N 524
Patent
active
050390066
ABSTRACT:
A forced air heating system having a dedicated supply duct for delivering heated air to the heated portions of the building and having an open air return system which uses the rooms, hallways, door openings, etc. of the building for returning air back to the furnace for reheating and recirculating. The elimination of a dedicated return air duct significantly improves the distribution airflow volume and thereby the efficiency and comfort of the central heating and air conditioning. The system includes a flue draft controller which monitors the flue draft at all heating applicances, such as furnaces, hot water heaters, etc., and servos a damper in a single main flue serving all appliances to optimize the flue draft for all appliances. If the flue draft becomes inadequate in any appliance, the controller shuts down heating appliances, as well as all heating system circulation fans, power fans and building exhaust fans which can affect the flue draft. The controller also enables building safety devices, such as smoke and combustible gas detectors to shut down heating appliances when a building safety problem is detected.
REFERENCES:
patent: 2184983 (1935-10-01), Tornquist
patent: 3537803 (1970-11-01), Ignazio
patent: 4079727 (1978-03-01), Smith
patent: 4204833 (1980-05-01), Kmetz et al.
patent: 4334258 (1982-06-01), Seeman et al.
patent: 4401425 (1983-08-01), Gable et al.
patent: 4406396 (1983-09-01), Habegger
patent: 4571912 (1988-06-01), Monette
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