Drain for condensate from flue gas
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United States of America Patent
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-
Sep 16, 1986
Grant Date -
N/A
app pub date -
Nov 13, 1984
filing date -
Nov 13, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For use with a hydrocarbon-fueled furnace whose secondary heat exchanger so cools the combusted gas as to condense much of its water vapor, and having a blower to the flue, a combined trap and drain is provided for the condensate formed both in the heat exchanger and in the flue. At the base of the flue is a standpipe whose upper overflow outlet is connected to a dip tube. Between the level of its lower end and the overflow level is a side inlet into the standpipe, connected to a tube leading downward from the heat exchanger's condenser. When the furnace blower applies both negative pressure to the condenser and positive pressure to the flue, the water levels in the trap and tube adjust to balance out these pressures.
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