In Ontario, the requirements for smoke and carbon monoxide (CO) detectors in homes are governed by the Ontario Building Code (OBC) and the Ontario Fire Code (OFC). Here’s what you need:
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Smoke Alarms
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Placement:
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Required on every level of the home, including the basement.
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Must be installed in or near sleeping areas.
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Power Source:
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New homes (built after 2015) must have hardwired smoke alarms with battery backup.
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Older homes can have battery-operated alarms but are encouraged to upgrade to hardwired units.
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Interconnection:
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Newer homes require interconnected smoke alarms (when one sounds, they all do).
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Carbon Monoxide (CO) Alarms
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Placement:
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Required outside all sleeping areas in homes with a fuel-burning appliance (e.g., gas furnace, water heater, fireplace) or an attached garage.
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Power Source:
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Can be battery-powered, plug-in, or hardwired, but hardwired with battery backup is recommended.​
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Additional Notes
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Smoke and CO alarms must be replaced every 10 years (or as per manufacturer guidelines).
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Landlords are responsible for ensuring alarms are installed and maintained in rental properties.
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Failure to comply can result in fines starting at $360 for homeowners and much higher for landlords.
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