Stoves and furnaces – Hot-air furnaces – Liquid or gaseous fuel
Patent
1978-04-05
1979-08-07
Scott, Samuel
Stoves and furnaces
Hot-air furnaces
Liquid or gaseous fuel
126110C, 126110E, 126116R, 237 55, 165 39, F24H 300, F24H 302, F24B 700
Patent
active
041634411
ABSTRACT:
The present device provides an air duct means disposed between the top end of the heat exchanger of a furnace and the entry port into the flue pipe of the furnace. An electrical blower means is coupled to said duct means to draw hot air therethrough which would otherwise go out to the atmosphere through the flue. The hot air drawn by the blower is redirected to heat, or assist in heating, the building to which the furnace is directing heat, or heat some other facility. An electrical control circuit is connected to the blower means and controls the blower means such that if the furnace is burning fuel, the blower cannot be turned on. The blower can only be turned on after a predetermined time has elapsed from the time that the fuel burning has terminated, so that combustion gases which otherwise would pass through the flue and which might contain harmful ingredients therein, will not be redirected to be used as a source of heat.
REFERENCES:
patent: 897732 (1908-09-01), Gerdes
patent: 2596290 (1952-05-01), Ryder et al.
patent: 2602441 (1952-07-01), Hollingsworth et al.
patent: 2884196 (1959-04-01), Allen
patent: 3935855 (1976-02-01), Van Vliet
patent: 4079885 (1978-03-01), Decker
Cleaver William E.
Green Randall L.
Scott Samuel
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