Heating systems – Air – Flue heated
Patent
1977-04-04
1978-08-01
Camby, John J.
Heating systems
Air
Flue heated
165DIG2, 237 50, 24273, 24 19, F24B 704
Patent
active
041038266
ABSTRACT:
A heat exchanger with a tubular body having helical ribs about its periphery constituting expanded interior and exterior conductive heating surfaces. A clamp is captively held to the tubular body for mounting the heat exchanger to the exhaust duct of a freestanding heating unit. Hot gases passing through the exhaust duct conductively heat is the expanded surface of the tubular body and air therein. A thermostatically controlled blower directs the heated air within the tubular body towards a heated surface of the freestanding heating unit for convectively heating the area about the unit.
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Popular Mechanics, Oct. 1974, p. 153.
Camby John J.
Yuen Henry C.
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