The Ontario Building Code | Required Mechanical Ventilation
9.32.3.2. Required Mechanical ventilation
(1) The mechanical ventilation system required in Article 9.32.1.2. shall comply with,
(a) Part 6, or
(b) this Subsection for a mechanical ventilation system in a Type I, Type II or Type IV dwelling unit.
In Plain Language
Mechanical ventilation is required under the conditions set out in this article, ensuring the building has adequate forced fresh air exchange.
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.