Stoves and furnaces – Hot-air furnaces – Preliminary air heater
Patent
1994-06-07
1996-10-08
Price, Carl D.
Stoves and furnaces
Hot-air furnaces
Preliminary air heater
126110R, 126116R, 126112, 126 91A, 165 8, 165 9, F24H 312, F23L 1502
Patent
active
055620892
ABSTRACT:
A high efficiency hot air furnace transfers substantially all of the combustion heat of a clean fuel gas fire to a stream of cool recirculating air by two heat exchangers both of which are mounted in a common plenum through which cool air is recirculated by means of a blower. It differs from the conventional high efficiency furnace in that the secondary heat exchanger is a porous movable heat sink which is alternately exposed to a stream of hot combustion gas and a part of the cool air stream from the recirculating air blower.
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