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Sealing Ducts in damp crawl space
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John Hines
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osspam (Joe Bobst) wrote:
I did have someone seal all of my return ducts with mastic and was
wondering if it made sense to do the same with the supply ducts
Why bother? When there's air flow in the ductwork, it's under positive
pressure, hence no air infiltration. When air flow stops, the pressure iside
and out are the same, so still no infiltaration. HTH
Do you want to heat the crawl space or the living environment?
Leaks reduce the efficiency of the ducting system.
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