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2" w.g. (500 pascal)
pressure class
duct construction standards
3" W.G. (750 PASCAL)
PRESSURE CLASS
DUCT CONSTRUCTION STANDARDS
3" w.g. (750 pascals)
pressure class
duct construction standards
4" w.g. (1000 pascals)
pressure class
duct construction standards
6" w.g. (1500 pascals)
pressure class
duct construction standards
cleat spacing