Heat exchanger unit and use
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United States of America Patent
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Jul 9, 2002
Grant Date -
May 9, 2002
app pub date -
Aug 30, 1999
filing date -
Sep 9, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a heat exchanger unit to be used in a gas-fired water heater in which heater a heat exchanger unit contains tubes with fins. According to the invention the heat exchanger unit contains flat oval tubes (1,21,31) having a fin (3,22,32) at least on one flat part (4,24,33). The flat oval tubes (1,21,31) as well as the fins (3,22,32) are made of copper, copper-based alloy, aluminium or aluminium-based alloy.
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