Where should carbon monoxide detectors be located?
The International Association of Fire Chiefs recommend a carbon monoxide detector on every floor of your home, including the basement. A detector should be located within 10 feet of each bedroom door and there should be one near or over any attached garage. Each detector should be replaced every five to six years.



Positioning them at head height is recommended, and Be-Alarmed suggests:


Do not place the alarm in a cupboard, behind furniture, near an outside door or ventilation ( e.g. extractor fans or cooker hoods)
Do not place alarms directly next to fires, boilers, cookers or heaters – the alarm should be at least 1 meter away from any of these appliances
Do not place an alarm in an area of high condensation and steam such as a bathroom or kitchen or sources of steam and condensation
The alarm should not be placed on a ceiling like a smoke alarm