In this video, Joshua Griffin explains a few theories and misconceptions when it comes to duct sizing. The hope is with more understanding of how ducts are sized, homeowners and contractors alike will not have any issues when sizing ductwork and understanding why certain sizes are significantly larger, or only somewhat larger. Joshua uses a graphic to show the differences between a 6, 8, 10, and 12-inch duct. He also explains the CFM levels of each size and the understanding of a 6 vs a 12-inch round duct.
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