Thread: Single wall or B Vent?
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Old 02-19-2008, 02:02 PM
Gunnar Alquist's Avatar
Gunnar Alquist Gunnar Alquist is offline
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Re: Single wall or B Vent?
Rick,

I see single wall in foundation crawlspaces frequently. Particularly on old floor furnaces. I believe that single wall is not allowed in attics and this would extend to foundation crawlspaces as well. In addition, if this is a newer 80%, the old transite pipe should be replaced with b-vent.
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