Code Library › Volume 1 › Section 6.3 — Ventilation Systems

PART 6 — HEATING, VENTILATING AND AIR-CONDITIONINGUpdated for the 2024 Ontario Building Code

6.3.2.3.Materials in Air Duct Systems

(1) All ducts, duct connectors, associated fittings and plenums used in air duct systems shall be constructed of materials
    as described in Article 3.6.5.1.

    (2) Ducts that are used in a location where they may be subjected to excessive moisture shall have no appreciable loss
    of strength when wet and shall be resistant to moisture-induced corrosion.

    (3) All ductwork and fittings shall be constructed and installed as recommended in SMACNA Manuals and ASHRAE
    Standards.

    (4) All duct materials shall be suitable for exposure to the temperature and humidity of the air being carried and shall be
    resistant to corrosion caused by contaminants in the air being conveyed in the duct.

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.