The Ontario Building Code | Location of Carbon Monoxide Alarms
9.33.4.2. Location of Carbon Monoxide Alarms
(1) Where a fuel-burning appliance is installed in a suite of residential occupancy, a carbon monoxide alarm shall be installed adjacent to each sleeping area in thesuite.
(2) Where a fuel-burning appliance is installed in a service room that is not in a suiteof residential occupancy, a carbon monoxide alarm shall be installed,
(a) adjacent to each sleeping area in every suite of residential occupancy that is adjacent to the service room, and
(b) in the service room.
(3) Where a storage garage is located in a building containing a residential occupancy, a carbon monoxide alarm shall be installed adjacent to each sleeping area in every suite ofresidential occupancy that is adjacent to the storage garage.
(4) Where a storage garage serves only the dwelling unit to which it is attached or built in, a carbon monoxide alarm shall be installed adjacent to each sleeping area in the dwelling unit.
(5) A carbon monoxide alarm shall be mechanically fixed,
(a) at the manufacturer’s recommended height, or
(b) in the absence of specific instructions, on or near the ceiling.
In Plain Language
Carbon monoxide alarms must be located as set out in this article, typically near sleeping areas and fuel-burning appliances, to provide timely warning.
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.