Gas-fired water heating apparatus
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United States of America Patent
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Nov 27, 2007
Grant Date -
Mar 2, 2006
app pub date -
Aug 23, 2005
filing date -
Aug 27, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The water heating apparatus has an upright cylindrical thermally insulated storage tank, an axially extending exhaust gas pipe passing centrally through the storage tank and a combustion chamber under the storage tank. An atmospheric gas burner, which has a complete premixing fuel gas/air supply system, is arranged within the combustion chamber. The exhaust gas pipe has a section extending within the combustion chamber, which preferably extends towards the bottom of the combustion chamber and has an end located a few centimeters from the bottom, so that the combustion gases have a longer dwell time in the combustion chamber and the exhaust gas pipe in order to improve heating efficiency.
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