Code Library › Volume 1 › Section 9.32 — Ventilation
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.32.3.9A.Location of Carbon Monoxide Alarms

(1) A carbon monoxide alarm shall be installed in a suite of residential occupancy where (a) a fuel-burning appliance or a flue is installed in the suite, (b) a forced-air fuel-burning appliance provides heated air directly to the suite, (c) a fuel-burning appliance or a flue is located in a room, suite or area that shares a common wall or floor or ceiling assembly with the suite, or (d) a storage garage shares a common wall or floor or ceiling assembly with the suite. (2) Where a carbon monoxide alarm is required by Sentence (1) to be installed in a suite of residential occupancy, other than a suite that consists of a combined living and sleeping area, a carbon monoxide alarm shall be installed (a) adjacent to each sleeping room in the suite, and (b) on each storey without a sleeping room in the suite. (3) Where a carbon monoxide alarm is required by Sentence (1) to be installed in a suite of residential occupancy that consists of a combined living and sleeping area, a carbon monoxide alarm shall be installed in the combined living and sleeping area. (4) In addition to the carbon monoxide alarms required to be installed in a suite of residential occupancy in accordance with Sentence (2), a carbon monoxide alarm shall be installed in each sleeping room within the suite where the sleeping room (a) contains a fuel-burning appliance or a flue, or (b) shares a common wall or floor or ceiling assembly (i) with a room, suite or area that is located outside the suite and contains a fuel-burning appliance or a flue, (ii) with a storage garage, or (iii) that is adjacent to an attic or crawl space to which the storage garage is also adjacent. (5) Carbon monoxide alarms shall be installed in public corridors serving suites of residential occupancy where the corridor is directly heated by a forced-air fuel-burning appliance. (6) Where carbon monoxide alarms are required by Sentence (5) to be installed in a public corridor, the carbon monoxide alarms shall be installed such that (a) there is at least one carbon monoxide alarm in each portion of a divided corridor, and (b) each carbon monoxide alarm in an undivided portion of a corridor is spaced not more than 25 m apart.
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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.