How much flex is too much in flex duct?

I said 180 degrees is better than 360 but not optimal. :wink:

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That looks like a 180° bend. Too much in my opinion, and s/b limited to about 90[FONT=Verdana]° bends. Without getting into numbers, just look for nice sweeps, without any pinched or crushed sections which restrict flow. Also take a quick look for taped splices on the flex cores, which tend to come apart over time (s/b strapped metal splice collars), significant rips in the flex, and good connections at the take-offs and boots.[/FONT]
[FONT=Verdana]Bottom line is that flex duct looks like it’s pinched, which can definitely restrict flow to that supply.[/FONT]
[FONT=Verdana]JMO & 2-nickels … :wink: [/FONT]

Yea, that one’s a no-brainer, Joe. I know you’ve got it covered.