The Ontario Building Code | Ducts in Exits

6.2.3.10. Ducts in Exits

(1) Except as permitted in Sentence (2), duct penetration of fire separations separating exits from the remainder of the building shall be in accordance with Article 3.4.4.4.

(2) Duct penetration of fire separations separating exits from the remainder of the buildingis 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.