Combustion product condensing water heater
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United States of America Patent
Stats
-
Mar 5, 1985
Issued Date -
N/A
app pub date -
Dec 8, 1982
filing date -
May 16, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a water heating system, vapor in the products of combustion gases is condensed in a secondary heat exchanger positioned in a housing with the primary heat exchanger and combustion chamber. The two heat exchangers are coaxial coils with the secondary coil surrounding the primary. Gases flow radially through the primary coil, axially along a baffle and then axially through the secondary coil at an increased velocity. The gas/air mixture is burned in a burner within the primary heat exchanger and the gas product are drawn through the exchangers by a blower. A water storage tank is designed to enhance stratification of hot water over cooler water. The cooler water is used to condense vapor in the secondary heat exchanger.
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