A practical guide to fire alarm system design — how to place smoke detectors, heat detectors, manual pull stations, and notification appliances correctly per NFPA 72, with zone layout strategies.
NFPA 72 — the National Fire Alarm and Signaling Code — is the governing standard for fire alarm system design in the United States. Every device placement decision, circuit configuration, and inspection interval is rooted in NFPA 72. Designers must work from the applicable edition adopted by the local AHJ, which may be 2019, 2022, or an older version.
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