
England and Wales – Building Regulations Document J
Requires a BS EN 50291 Kitemarked Carbon Monoxide alarm to be fitted when any new or replacement solid-fuel appliance is installed. Examples of solid fuel burning appliances are wood burners, open fires etc.
The Carbon Monoxide alarms should be fitted in the room with the appliance.
Alarms can be mains or battery powered. If the alarm is battery powered then the battery should last for the life of the alarm.

Scotland – Technical Handbook (Domestic) – Environment
Requires a BS EN 50291 Kitemarked Carbon Monoxide alarm to be fitted when any new or replacement fuel appliance is installed (except cookers). This covers any fuel burning appliance, including those that burn gas, oil, coal and wood.
Alarms should be fitted in:
- The room with the appliance or, if it is an enclosed boiler, just outside the enclosure
- Any room that has a flue running through it
- Alarms can be mains or battery powered. If the alarm is battery powered then the battery should last for the life of the alarm.

Northern Ireland – Technical Booklet L
Requires a BS EN 50291 Kitemarked Carbon Monoxide alarm to be fitted when any new or replacement fuel appliance is installed (except cookers). This covers any fuel burning appliance, including those that burn gas, oil, coal and wood.
Alarms should be fitted in:
- The room with the appliance or, if it is an enclosed boiler, just outside the enclosure
- Alarms can be mains or battery powered. If the alarm is battery powered then the battery should last for the life of the alarm.
Advice and Guidance
Find out more about Carbon Monoxide Alarm siting
If you would like more advice on how to site alarms effectively throughout the property visit our page on alarm siting. If you would like more information on the standards and regulations for a property outside of these guidelines please contact our Technical Team, technical@aico.co.uk, or your Building Control Officer through your Local Planning Authority.
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