Water heater with condensing flue
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United States of America Patent
Stats
-
Nov 23, 2010
Grant Date -
Jun 18, 2009
app pub date -
Dec 13, 2007
filing date -
Dec 13, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A water heater has a burner positioned below a vertical centrally located flue with heat exchange capacity enhanced by a multiplicity of rectangular metal fins which are welded on the inside of the vertical central flue. The central flue extends upwardly within a water tank. The central flue transitions to a smaller diameter downwardly draining helically coiled condensing flue. Approximately 80% of the heat from the combustion gases is transferred to the water within the water tank through the wall of the central flue without condensation. An additional 10% or more of the combustion heat is transferred to the water accompanied by condensation of water in the coiled flue. A fan draws the combustion gases through the central flue and the coiled condensing flue and supplies the combustion gases to an exterior vent.
First Claim
Family
International Classification(s)
Cited Art Landscape
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