Flex Duct vs. Straight Pipe

Old 03-29-04, 09:51 AM
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Flex Duct vs. Straight Pipe

I am finishing my basement and am at the stage to add duct work from my main trunk line to heat the space. I was going to use 6" flex pipe but some of my runs are ~20' and someone told me to use straight pipe instead because I would lose too many CFMs. Should I be concerned about this. Since I've never done this before, that flex pipe looks so much easier for me to work with. Any thoughts?
Old 03-29-04, 12:52 PM
Ed Imeduc's Avatar
Join Date: Aug 2002
Location: Mountain Williams Missouri
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Yes DONT use the flex. Get the round sheet metal pipe 6"X5' and use it. The flex has to much drag in it. you can put 2 or 3 of the pipes together on the ground with 3 screw in each then put them up. A lot easier to hang them up there than the flex anyway use just wire to hold them up. ED

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