Where should I install carbon monoxide alarms?


Where are places in my home that I should install carbon monoxide alarms? Where should I avoid installing one?


Install at least one carbon monoxide (CO) alarm near or in each separate sleeping area. For added protection, install an additional carbon monoxide alarm at least 5 meters away from a furnace or a fuel-burning heat source. Also, locate carbon monoxide alarm at least 3 meters from sources of humidity like bathrooms and showers. In two story houses, install one carbon monoxide alarm on each level of the home. If you have a cellar, install that carbon monoxide alarm at the top of the cellar stairs.

Do NOT locate a carbon monoxide alarm in garages, kitchens, furnace rooms, or in any extremely dusty, dirty, humid, or greasy areas. Do not place units in direct sunlight, or areas subjected to temperature extremes, including unconditioned crawl spaces, unfinished attics, uninsulated or poorly-insulated ceilings, and porches. Carbon monoxide alarms should not be located in outlets covered by curtains or other obstructions.


Do not place an alarm in turbulent air, such as near ceiling fans, heat vents, air conditioners, fresh air returns, or open windows. Blowing air may prevent carbon monoxide from reaching the alarm’s sensors.

See also information on installing smoke alarms.