The Ontario Building Code | Exhaust Ventilation
3.3.1.19. Exhaust ventilation
(1) An exhaust ventilation system designed in conformance with the appropriate requirements of Part 6 shall be provided in a buildingor part of a building in which dust, fumes, gases, vapour or other impurities or contaminants have the potential to create a fire or explosion hazard.
(2) Explosion relief devices, vents or other protective measures conforming to Subsection 6.2.2. shall be provided for a space in which substances or conditions that have the potential to create an explosion hazard are present as a result of the principal use of a building.
In Plain Language
This clause sets requirements for exit doors serving high occupant loads, including door hardware types (like panic bars) that allow the door to open easily even when a crowd is pressing against it.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.