Condensing water heater

Details Condensing water heater Condensing water heater

2011-08-09

2011-08-09

Wilson, Gregory A (Department: 3749)

Liquid heaters and vaporizers

Stand boiler

Fluid fuel burner

C122S015100, C122S032000

Reexamination Certificate

active

07992526

ABSTRACT:
A flue system is provided for a water heater having improved heat exchange efficiency. The flue system includes an upstream heat exchange portion providing a first pass for heat exchange with water in the water heater. The flue system further includes a downstream heat exchange portion providing a second pass for heat exchange with water in the water heater and a blower positioned between the upstream heat exchange portion and the downstream heat exchange portion. The blower is configured to urge combustion products from the upstream heat exchange portion to the downstream heat exchange portion.

REFERENCES:
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patent: 4846150 (1989-07-01), Maton
patent: 5699756 (1997-12-01), Ross et al.
patent: 7354244 (2008-04-01), Hasbargen et al.
patent: 2002/0014233 (2002-02-01), Gatley, Jr. et al.
patent: 2004/0011301 (2004-01-01), Gordon et al.
patent: 2006/0065211 (2006-03-01), Hasbargen et al.
patent: 2009/0165733 (2009-07-01), Ferguson
patent: 2010/0043728 (2010-02-01), Ma et al.

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