Quote:
Originally Posted by E-Revonut
Flex is not good for full runs. There is a lot of static loss with flex, a lot of friction on the air passing through because the sides aren't smooth. Generally the most flex I'm allowed to put at the end of a run is 6', sometimes the specs for a job call for no more than 3'.
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Good to know, I figured it had to have some problems, as it is so easy to use. We left the bulk of the solid ducting in my house, and just used short lengths of the flexi duct to tie in to the new plenum.
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