BS 5839-1:2025 is the updated British Standard for fire detection and alarm systems in non-domestic buildings in the England and Wales.
The 2025 revision replaces the 2017 version as of 30th April 2025.
It provides best practices for the design, installation, commissioning, and maintenance of these systems, the standard includes significant changes aimed at improving clarity regarding:
Fire alarm zoning
Prioritizes smoke detection over heat detection in sleeping rooms
Requirements regarding automatic detection in stairway lobbies
Changes mandating alarm and fault signal monitoring by an Alarm Receiving Centre (ARC) for care home.
The revised standard also provides clarity to acceptable and non-acceptable variations from the standard with the aim of addressing evolving industry needs, and enhancing fire safety compliance.
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