Best way to duct?


Old 05-04-02, 07:46 PM
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Question Best way to duct?

I have just had long, foil covered, fiberboard air carriers installed in my attic here in hot Texas. There are about 10 flex 8" low r ducts coming from this 40' box that attach to the registers. Is this the best or even efficient? I asked for metal air carriers and R-6 Flex Duct Did not get it Ins is paying for it. They said I could get what was most efficient.
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Old 05-06-02, 07:28 PM
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I take it from your info, that you have a rigid fiberglass duct trunklinem with 8" flex going to each outlet. (sorry, but am not sure what you mean by a 40' box that attaches to the registers. Sounds like you're talking about a distribution box) Flex duct is used very commonly these days becuse of its ease of installation, cost/labor factor and it makes an acceptable duct system. Since I'm a hasbeen, I've long forgotten the R values of ductboard and flex. Perhaps another pro can give the numbers to you. Rigid board is superior to flex for good airflow with a minimum of resistance and I believe has a better R value. Metal duct ordinarily will last longer and costs more, but I can't give you the R value for wrap. Check back on this site for other threads.

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