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Forums >> Revit Systems >> Technical Support >> Duct Loss Coefficient not matching
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active
Joined: Mon, Oct 12, 2009
22 Posts
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Hello
I have a 100 ft duct with 3600 cfm. The duct is 24 in. in Dia. I'm trying to find the Loss Coefficient.
Revit 2013 gives me a value of .821083.
I hand calculated the value based on the Altshul-Tsal friction factor equation . The number I came up with
was .016323.
Re-236450.6, Dh-24, E-.0003,
Why the difference in numbers?
Thanks
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Joined: Fri, Nov 12, 2010
1749 Posts
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Are you sure your calculations are correct?
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Joined: Mon, Oct 12, 2009
22 Posts
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Yes. Checked and rechecked
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