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Flex vs. Aluminum ducts

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HVAC Discussions - Heating, ventilation and air conditioning. 

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Subject Author Date
Flex vs. Aluminum ducts farseer 01-18-2007
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Posted by Rick Blaine on January 20, 2007, 12:57 pm

>Flex ducting has a higher friction loss, and tends to sag, which
>exaserbates the problem. We have several condos in my area
>that used flex ducting and most have air flow problems.

I have a 12 year old house with flex ducting in the for the second floor system
and it seriously sucks. The resistance on the long runs makes it impossible to
get any kind of balanced airflow.

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