Yes, a sealed battery or mains-powered carbon monoxide alarm must be provided with a new or replacement combustion appliance, excluding those designed solely for cooking purposes. The CO detector should be installed in the same room as the appliance if it is a room normally used by occupants; if it is, for example, a boiler located in a dedicated room / cupboard that occupants do not normally enter, the detector should be located just outside of that cupboard or room.
This has been in effect since 2012, with the guidance in clause 2.51 of The Building Regulations Technical Booklet L setting out requirements for combustion appliances and fuel storage systems.
Please see our page on carbon monoxide alarm legislation for more specific guidance or view our range of suitable carbon monoxide alarms.
Reviewed: 14/09/2023 (doc:536 V1.0). Our articles are reviewed regularly. However, any changes made to standards or legislation following the review date will not have been considered. Please note that we provide abridged, easy-to-understand guidance. To make detailed decisions about your fire safety provisions, you might require further advice or need to consult the full standards and legislation.
