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BertPage BertPage is offline
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Join Date: Oct 2005
Location: N.C.
Posts: 56
Quote:
Originally Posted by ShakinJoe View Post
I would think the pressure would increase at the backing plate opening at the reduction...no?

Same flow with reduction in area equals increase in P.....
In those ducts you have very little pressure and any change, crimp, turn, etc. reduces flow – even if you are using a fan. You can easily demonstrate this. Example:

Old 10-08-2009, 02:55 PM
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