Stoves and furnaces – Hot-air furnaces – Preliminary air heater
Patent
1984-05-07
1986-05-13
Green, Randall L.
Stoves and furnaces
Hot-air furnaces
Preliminary air heater
126114, 122183, F24H 312
Patent
active
045879494
ABSTRACT:
A heater for air and liquid utilizing a combustible fuel which includes a first vertical stack including a combustion tube or heat stack with a bottom burner. The heat stack is surrounded by a heat transfer unit with alternate down passages and up passages. The down passages carry the heated exhaust gas. The up passages carry the fluid to be heated. A second vertical stack carries outgoing combustion gases, incoming secondary air supply for combustion, and incoming air to be heated or fluid to be heated. A heat transfer arrangement in the second stack transfers heat from outgoing combustion gases to incoming space air and combustion support air when the unit is used as a space heater.
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patent: 4338888 (1982-07-01), Gerstmann et al.
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