Unit for supplying combustion air to a furnace

Details Unit for supplying combustion air to a furnace Unit for supplying combustion air to a furnace

1989-08-14

1991-01-01

Yuen, Henry C.

Heating systems

Combined with water heater

110162, 110163, 126 85B, F24D 308, F23L 1700

Patent

active

049812629

ABSTRACT:
An improved unit (10) which supplies combustion air (A) to a furnace (100) or hot water heater (200) is described. The unit includes a switch (59) which continues the operation of motor (14) and fans (12 and 15) in unit (10) until the hot flue gases (H) are vented and to cool exhaust gas pipe (22) after the furnace and/or hot water heater cease to operate to produce heat.

REFERENCES:
patent: 2877724 (1959-03-01), Arvintz et al.
patent: 3964675 (1976-06-01), Euchner Jr.
patent: 4205631 (1980-06-01), Parker
patent: 4262608 (1981-04-01), Jackson
patent: 4290552 (1981-09-01), Prikkel III
patent: 4424792 (1984-01-01), Shimek et al.
patent: 4449569 (1984-05-01), Lisi et al.
Trade Literature--Honeywell Tradeline Controls Form #95-6247.

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