PART 6 — HEATING, VENTILATING AND AIR-CONDITIONINGUpdated for the 2024 Ontario Building Code
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6.3.4.2.General Ventilation
(1) A laboratory shall be provided with continuous mechanical ventilation designed to ensure that dangerous goods
vapours and particles
(a) do not accumulate in the laboratory,
(b) are prevented from migrating to other parts of the building,
(c) do not accumulate in the ventilation system,
(d) are exhausted to the outdoors, and
(e) are not returned to the building.
(2) A ventilation system required by this Subsection shall be provided with monitoring devices to
(a) indicate that the ventilation system is in operation, and
(b) sound an alarm if the ventilation system is malfunctioning.
(3) A ventilation system required by this Subsection shall be maintained in conformance with Section 4.12. of the Fire
Code made under the Fire Protection and Prevention Act, 1997.
6.3.4.2.A. Power-Ventilated Enclosure
(1) A power-ventilated enclosure required by the Fire Code made under the Fire Protection and Prevention Act, 1997
shall be designed and constructed to conform to Articles 6.3.4.3. and 6.2.4.4.
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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.