High-efficiency heating unit
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United States of America Patent
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Feb 5, 1991
Grant Date -
N/A
app pub date -
Feb 6, 1990
filing date -
Feb 6, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A forced hot-water heating system in which sensible and latent heat remaining in flue gases after contact with a primary heat exchanger is recycled into incoming cold air by a second heat exchanger. The heater, humidified intake air is then directed to a fuel burner, and reduces the amount of fuel necessary to achieve a given amount of heat exchange at the primary heat exchanger at normal operating return-water temperatures.
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