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NFPA 13 Edition
▶Key differences between editions
§8.6.2.1 — Light Hazard max coverage
2019: 225 sq ft (20.9 m²)
2022: 225 sq ft (20.9 m²) — unchanged
§8.6.2.1 — Ordinary Hazard max coverage
2019: 130 sq ft (12.1 m²)
2022: 130 sq ft (12.1 m²) — unchanged
§8.6.3.4 — Residential sprinkler coverage
2019: Up to 256 sq ft per head
2022: Up to 400 sq ft per head (extended coverage residential)
§8.15.1.2 — Obstruction rule
2019: Obstruction > 4 ft requires additional sprinkler
2022: Clarified: measured center of duct, not edge; 18 in. offset rule added
§9.3.4 — Waterflow test requirement
2019: Test within 1 year of system installation
2022: Test within 6 months; digital reporting accepted
Selected edition affects spacing/coverage thresholds in compliance checks.