Code Library › Volume 1 › Section 6.9 — Fire Safety Systems

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

6.9.2.4.Ducts in Exits

(1) Where ducts penetrate fire separations separating exits from the remainder of the building, they shall be in
  accordance with Article 3.4.4.4.

  (2) Duct penetration of fire separations separating exits from the remainder of the building is permitted if the duct
  (a) is designed for the purposes of Subsection 3.2.6., or
  (b) only serves the exit from a dedicated rooftop air make-up unit.

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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.