Fire Detection and Alarm Systems
Fire detection and alarm systems automatically sense smoke, heat or flame at an early stage of a fire and initiate alarm signalling, actuation of connected equipment and notification of the fire brigade or an alarm receiving centre.
Architecture and Detector Types
A fire alarm control panel evaluates signals from smoke, heat, flame or multi-sensor detectors as well as manual call points, and actuates fire dampers, doors, lifts or downstream extinguishing systems accordingly. Detector selection and spacing depend on room geometry and the expected fire characteristics of the specific occupancy.
Design Coordination and Boundaries
Where the fire detection system interacts with extinguishing systems – for example to release a gaseous extinguishing system or free a smoke and heat exhaust system – this requires carefully coordinated control logic between the trades involved. Poorly designed detection either increases the false alarm rate or delays actual detection.
Insurance Relevance
As the cluster hub of fire detection, the fire alarm system is the prerequisite for rapid intervention and for the automatic actuation of downstream extinguishing systems. Its reliability depends heavily on correct design, ongoing maintenance and a functioning alarm organisation, without which even a technically sound system remains ineffective in an actual event.
Standards and codes
- VdS 3405 – Insurance Technical Evaluation of Fire Detection Systems
- NFPA 72 – National Fire Alarm and Signaling Code