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Thread: Ductwork

  1. 03-23-2005, 05:55 PM #14
    25skeet
    25skeet is offline Regular Guest
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    I know this is late but here in great falls mt they have adopteed the international code witch calls out all duct must be sealed.
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  2. 03-23-2005, 06:24 PM #15
    nathan9999
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    Thread Starter
    Does it make a difference if the ducts are flex versus sheet metal?

    All of the new construction I have seen locally seem to use round flex ductwork. In this area everything is a split system (gas heat) with the ductwork in an unconditioned attic.

    Is there a sealant used for this flex ductwork?
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  3. 03-23-2005, 06:36 PM #16
    dash
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    Originally posted by nathan9999
    Does it make a difference if the ducts are flex versus sheet metal?

    All of the new construction I have seen locally seem to use round flex ductwork. In this area everything is a split system (gas heat) with the ductwork in an unconditioned attic.

    Is there a sealant used for this flex ductwork?

    Yes,mastic is what is the best.
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  4. 03-23-2005, 08:33 PM #17
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    bornriding
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    Norm

    About what you said - duct leakage
    Can you be more specific, referring only to fabricated duct with s-locks & drives
    Rate or percentage of leakage ??
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