Approved Document J: Combustion appliances and fuel storage systems
England-focused reference checklist
Editorial source review: 2026-10-17
https://saeedazarshab.com/articles/england-building-regulations/approved-document-j/

INDEPENDENT GUIDANCE — not project-specific legal/design advice or a compliance certificate. Check the official current requirements and applicable transition.

Part J covers combustion appliances and fuel storage systems, including air supply, discharge of combustion products and protection of the building. Flues, chimneys, ventilation and carbon-monoxide detection need to be considered together. Requirements depend on the appliance, fuel, location and work being undertaken.

WHAT TO CHECK
[ ] Identify the appliance, fuel and proposed installation before selecting guidance.
[ ] Arrange competent design, installation and the appropriate notification or certification route.
[ ] Coordinate flue routes, air supply, clearances and protection with the building fabric.
[ ] Check the applicable carbon-monoxide detection and commissioning provisions.
[ ] Retain the information needed for safe operation, servicing and later alterations.

RECORDS TO KEEP
- Appliance and flue specifications and installation information
- Commissioning/certification and relevant notifications
- Operating, servicing and safety information

WHEN TO GET SPECIALIST HELP
Use a competent installer appropriate to the fuel and activity. If fumes or unsafe operation are suspected, stop using the appliance and obtain appropriate safety assistance rather than relying on an online diagnosis.

SCOPE AND EDITION
2010 edition incorporating 2010, 2013 and 2022 amendments; 2022 changes effective 1 October 2022 extend carbon-monoxide alarm guidance. Check project applicability. Use competent installation and testing appropriate to appliance and fuel. Consider ventilation, flue routes and CO detection together.

OFFICIAL SOURCES
GOV.UK — Approved Document J
https://www.gov.uk/government/publications/combustion-appliances-and-fuel-storage-systems-approved-document-j

Contains public sector information licensed under the Open Government Licence v3.0, except where otherwise stated. Original practical summary by Saeed Azarshab.
https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/