Water heating apparatus with passive flue gas recirculation
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United States of America Patent
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Sep 16, 1997
Issued Date -
N/A
app pub date -
Sep 5, 1995
filing date -
Jun 17, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a water heating apparatus and method to passively recirculate flue gas in order to reduce NO.sub.x emissions formed during combustion. The apparatus uses a high efficiency burner, a submergible, pressurized, combustion chamber having multiple external heating surfaces, and a flue collector that collects and passively recirculates a portion of the flue gases back into the burner air intake while exhausting the rest. The multiple external heating surfaces are installed within a closed tank and are submerged in water under pressure during use.
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Family
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Cited Art Landscape
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