04-12-2009, 01:16 PM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 4,978
Thanks: 0
Thanked 102 Times in 102 Posts
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your ducts are for the most part 8x10. make up some trunk lines that are 4x20 you'll still have the same flow through them 8x10=80, 4x20=80 make up a trunk reducer 8x10 to 4x20
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