Based on NFPA 72 guidelines used by fire protection engineers.
Fire Alarm Detector Calculator
Based on NFPA 72 smoke detector spacing guidelines.
Typical spacing ≈ 9.1 m (30 ft).
NFPA Clause Reference
According to NFPA 72:
- Smoke detector spacing typically 30 ft (9.1 m)
- Maximum coverage ≈ 900 sq ft (≈83 m²) per detector
- Ceiling height impacts spacing adjustments
Relevant section:
NFPA 72 – Chapter 17 (Initiating Devices)
Smoke Detector Spacing Requirements
Fire Alarm Detector Calculator (Indian Standard – 7 m Spacing)
In many Indian projects following National Building Code of India, engineers adopt a more conservative spacing (~7 m) to ensure better coverage and safety.
So your calculator should support:
- Detector spacing: 7 m
- Coverage area ≈ 49 m² (7 × 7)
This makes the tool more accurate for Indian projects.
