Sheet Metal & Air Conditioning Contractors’ National Association

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Rooftop Ductwork: Round or Rectangular?

Apr 29, 2021

Air Ducts-1287932496 600x399When the Air Handling Unit (AHU) will be placed on a rooftop, the designer must consider the ductwork that must route across the roof as well as the duct supports. The Rooftop Ductwork Technical Resources Bulletin examines the differences between round and rectangular duct types and which factors to consider when choosing the appropriate duct type for rooftop ductwork applications.