Stoves and furnaces – Hot-air furnaces – Compressed air
Patent
1994-02-03
1994-09-20
Yeung, James C.
Stoves and furnaces
Hot-air furnaces
Compressed air
126116R, 165137, 165913, F24H 302
Patent
active
053479807
ABSTRACT:
A fuel-fired forced air condensing furnace has installed therein a recuperative heat exchanger assembly with a primary heat exchange section operative, during furnace operation, to transfer sensible combustion gas heat to air being flowed through the furnace, and a secondary heat exchange section operative to transfer latent combustion gas heat to the air. The secondary heat exchange section includes a finned tube heat exchanger structure extending between spaced apart combustion gas inlet and outlet collector boxes. The finned tube heat exchanger structure is canted in two perpendicular directions relative to the collector boxes in a manner such that combustion gas condensate formed in the secondary heat exchange section during furnace operation will drain into the outlet collector box, and outwardly through a condensate outlet fitting therein, with the heat exchanger in either a vertical air flow orientation or a horizontal air flow orientation in which the assembly has been rotated ninety degrees relative to its vertical air flow orientation about a horizontal axis parallel to the separation direction of the inlet and outlet collector boxes.
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Rheem Manufacturing Company
Yeung James C.
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