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Old 04-04-2011, 03:17 PM   #1
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Air flow

Can u use a 10 inch round flex pipe 25 feet long with 1 6 inch round flex vents branching off at every 6 feet for a total of four vents if so what should I use it's a 3 ton self contained unit heat pump using a 20 x 10 main trunk with 5 6 inch rounds running of that for the down stairs much needed help


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Old 04-04-2011, 03:41 PM   #2
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The 20X10 if thats inside dimensions is border line for a 3 ton(actually, a bit small).

The 10" flex will carry 280 to 320 CFM quietly. Which is about what you would expect for 4-6" flex supplies.


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