In forceFire & Building Safety
Approved Document J: Combustion appliances and fuel storage systems
Flues, ventilation, carbon monoxide and fuel storage
Guidance on the safe installation of combustion appliances, flues, ventilation and fuel storage, including carbon monoxide safety.
Also known as: AD J, Approved Document J, carbon monoxide
Key requirements
- Covers solid fuel, gas, oil and other combustion appliances.
- Guidance on flues, chimneys, ventilation and hearths.
- Carbon monoxide alarms are required in certain locations.
- Includes oil and gas fuel storage requirements.
- Applies to new and replacement appliances and associated work.
Performance at a glance
- Key risk
- Carbon monoxide
- Scope
- Appliances, flues, fuel storage
Applies to
Installation and alteration of combustion appliances and fuel storage in England.
Related records
Reviewed 25 October 2026. This summary is an editorial reference, not legal advice. Check the current official text and confirm the approach with building control before relying on it. Browse all 35 records.