12-10-2008, 02:08 PM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 4,979
Thanks: 0
Thanked 102 Times in 102 Posts
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for combustion air you need as large a volumn as practical. each elbow is a restriction. why not use the flexible aluminum dryer duct with duct tape for joints? this way you can transition around a corner without creating a definate 90.
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