Heat exchanger
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United States of America Patent
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Dec 1, 2020
Grant Date -
Dec 6, 2018
app pub date -
Nov 22, 2016
filing date -
Nov 25, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A heat exchanger includes front and back walls forming a flue gas space such that a fluid flowing through a channel formed in the front and back walls can exchange heat with flue gas in the flue gas space, in use. The front wall includes a lower portion extending along the back wall, and an upper portion extending upwardly from an upper end of the lower portion and outwardly away from the back wall to form a combustion space of a flammable gas between the upper portion and the back wall. A length of the upper portion along a longitudinal direction thereof is longer than a length of the lower portion along a longitudinal direction thereof.
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