CSI MasterFormat · Division 23 Heating, Ventilating, and Air Conditioning (HVAC)

23 31 00 HVAC Ducts and Casings

Galvanized steel, fiberglass, and flexible ductwork per SMACNA standards.

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The CSI MasterFormat code for HVAC Ducts and Casings is 23 31 00, in Division 23 (Heating, Ventilating, and Air Conditioning (HVAC)). It is most often checked against IMC Chapter 6 — Duct Systems.

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