I’m looking to insulate the ducts in my crawlspace to R8.0.
At my local Lowe’s and Home Depot, I don’t really see any insulation sleeves – only one or two stores carry these sleeves and not with the R-value I want.
I’ve heard that the inner diameter of flex duct is slightly larger than galvanized duct and can be used to insulate rigid duct. Is this true? If so is it a good idea?
I live in Dayton, OH. I’ve looked for an HVAC supply store, but google hasn’t turned up much that looks promising. I’m a newbie, sorry for any unclear nomenclature or misunderstandings. Thanks for any help,
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