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  1. #1
    Join Date
    Feb 2010
    Landis North Carolina
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    York Vent sizes& routing

    Has anyone heard of new venting allowances for york 90+furnaces? york has approved 4in vent and also allow you to run downhill(trapped drain required at bottom of riser) But you can leave furnace and go down to basement then outside, Just saw the tech tip yesterday, just wanted to share stickinit2thman

  2. #2
    Join Date
    Feb 2008
    Ontario, Canada
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    Guess they won't need that secondary heat exchanger much eh?

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