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Duct Construction Standards

Duct Construction Standards

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Construction Class A All transverse joints, longitudinal seams and duct wall penetrations All transverse joints and longitudinal seams Transverse Joint B C 4” w.g. and up 3” w.g. 2” w.g. In addition to the above, any variable air volume system duct of 1” and 1/2” w.g. construction class that is upstream of the VAV boxes shall meet ...

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