𝑺𝒎𝒐𝒌𝒆 𝑫𝒆𝒕𝒆𝒄𝒕𝒐𝒓 𝑺𝒑𝒂𝒄𝒊𝒏𝒈 𝒇𝒐𝒓 𝑯𝒊𝒈𝒉 𝑪𝒆𝒊𝒍𝒊𝒏𝒈𝒔

High Ceilings, New Rules: NFPA 72 (2025) Raises the Bar

NFPA 72 (2025) introduces a major change for smoke detection in ceilings over 40 feet high.
Traditional 30-foot spacing no longer applies automatically — ceiling height, stratification, and airflow must now be evaluated.

When air movement or heat layers can delay smoke reaching the ceiling, a performance-based design may be required. That means using modeling, testing, or documented engineering analysis to justify detector placement and coverage.