Update to Fire Alarm Systems British Standard: BS 5839-1:2025

BS 5839-1:2025 provides the best practices for fire alarm systems in non-domestic buildings, covering the design, installation, commissioning, and maintenance of fire detection and alarm systems.

The 2025 update was published by the BSI on 29th April 2025 and supersedes BS 5839-1:2017.

The update includes the following important changes:

• Restructuring of some clauses
  • The standard has reorganised certain sections to provide clearer guidance for practitioners.
• New section to address fire alarm system extensions and modifications
  • A dedicated new section addresses how to properly extend or modify existing fire alarm systems.
• Tighter control on fire alarm system variations
  • The updated standard introduces stricter requirements on variations to ensure greater consistency and reliability.
• Simplified installation recommendations for manual call points
  • Installation recommendations for manual call points have been streamlined for more straightforward implementation.
• Improved guidance on fire detection in sleeping areas
  • Preferring automatic fire detection rather than heat detectors or sprinkler system heads in rooms where people sleep. This change enhances safety in accommodation settings.

Why is this update important?

British Standards are regularly reviewed to reflect advances in technology, research findings, and industry best practices. This update to BS 5839-1 ensures fire alarm systems continue to provide appropriate protection for building occupants and assets.

The changes will affect how fire alarm systems are designed, installed, and maintained in non-domestic premises. Organisations responsible for fire safety should familiarise themselves with these updates, particularly if they manage buildings with sleeping accommodation.

Staying up to date with fire safety standards

Keeping current with the latest fire safety standards is essential for maintaining compliance and ensuring effective protection. A regular review of your systems against updated standards helps identify areas that may need attention.

Professional training helps to keep your fire safety knowledge current. Our courses cover the latest standards and provide practical guidance on implementation.

If you'd like to learn more about these changes and how they might affect your fire safety responsibilities, contact us on 01925 211488 or visit our course calendar for upcoming training dates.