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Ontario Building Code:

 
6.2.12.  Carbon Monoxide Alarms

 
6.2.12.1.  Application

 
(1)  This Subsection applies to every building that,

 
(a) contains a residential occupancy, and

 
(b) contains a fuel-burning appliance or a storage garage.

 
6.2.12.2.  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 the suite.

(2)  Where a fuel-burning appliance is installed in a service room that is not in a suite of 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 of residential occupancy that is adjacent to the storage garage.

 
6.2.12.3.  Installation and Conformance to Standards

 
(1)  The carbon monoxide alarms required by Article 6.2.12.2. shall,

 
(a) be permanently connected to an electrical circuit and shall have no disconnect switch between the overcurrent device and the carbon monoxide alarm,

 
(b) be wired so that its activation will activate all carbon monoxide alarms within the suite, where located within a suite of residential occupancy,

 
(c) be equipped with an alarm that is audible within bedrooms when the intervening doors are closed, where located in a suite of residential occupancy, and

 
(d) conform to,

 
(i) CAN/CSA-6.19, "Residential Carbon Monoxide Alarming Devices", or

 
(ii) UL 2034, "Single and Multiple Station Carbon Monoxide Alarms".

 
9.33.4.  Carbon Monoxide Alarms

 
9.33.4.1.  Application

 
(1)  This Subsection applies to every building that,

 
(a) contains a residential occupancy, and

 
(b) contains a fuel-burning appliance or a storage garage.

 
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 the suite.

(2)  Where a fuel-burning appliance is installed in a service room that is not in a suite of 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 of residential 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.

 
9.33.4.3.  Installation and Conformance to Standards

 
(1)  The carbon monoxide alarm required by Article 9.33.4.2. shall,
 
(a) except as permitted in Sentence (2), be permanently connected to an electrical circuit and shall have no disconnect switch between the overcurrent device and the carbon monoxide alarm,
 
(b) be wired so that its activation will activate all carbon monoxide alarms within the suite, where located within a suite of residential occupancy,

(c) be equipped with an alarm that is audible within bedrooms when the intervening doors are closed, where located adjacent to a sleeping area, and

(d) conform to,
 
(i) CAN/CSA-6.19, "Residential Carbon Monoxide Alarming Devices", or

 
(ii) UL 2034, "Single and Multiple Station Carbon Monoxide Alarms".

 
(2)  Where the building is not supplied with electrical power, carbon monoxide alarms are permitted to be battery operated.