Standard ceiling height (≤7.5m): Up to 60m² per detector
Open plan areas: Up to 80m² per detector
High ceiling (>7.5m): Reduced coverage, professional assessment required
m²
m
Estimated Detectors Required
0
⚠️ Important Limitations
This calculator provides a basic estimate only and does not replace professional fire risk assessment.
Actual requirements depend on many factors including:
Room geometry and layout
Obstructions (beams, partitions)
Environmental conditions
Specific occupancy risks
Building construction and materials
Escape route configuration
Always consult a qualified fire safety professional for accurate system design and to ensure compliance with current regulations.
⚠️ Disclaimer: This calculator is provided as a guidance tool only. Always verify calculations independently and consult current BS 5839 standards. Professional fire alarm system design should be undertaken by qualified engineers.