NFPA 72, the National Fire Alarm and Signaling Code, is on a three-year revision cycle. The 2025 edition is now published, and while California typically adopts new NFPA references on a delayed cadence through the California Building Standards Commission, the operational implications matter today — many AHJs already reference the newer edition in project-specific requirements, and enterprise clients set their own internal spec at the current NFPA release.
Here are the changes most likely to show up in your next inspection, retrofit, or new-construction project.
1. Supervising station communication paths
Chapter 26 continues its multi-cycle evolution away from POTS and toward performance-based signaling. The 2025 edition tightens language around single-path cellular and dual-path IP + cellular, and adds explicit provisions for managed facility voice networks (MFVN) as an acceptable path. If you have been operating on the assumption that "two POTS lines" is still the default, that assumption is retired.
2. Voice intelligibility, in writing
Voice evacuation systems have long been required to be "intelligible," but measurement expectations have varied by jurisdiction and integrator. The 2025 edition continues the direction set in 2022 — expect Speech Transmission Index (STI) measurement in acoustically distinguishable spaces (ADS) to become the default acceptance criterion in your design documents. If your integrator is not walking the site with an STI meter at commissioning, that is now a gap.
3. Mass notification integration
Chapter 24 mass notification requirements continue to normalize integration between the fire alarm system and other emergency communication systems. In practical terms: on schools, healthcare, high-rise, and public assembly, expect the fire alarm platform to be specified with mass-notification capability from day one — voice priority, message overrides, and remote activation — rather than bolted on later.
4. Inspection, testing, and maintenance (ITM)
Chapter 14 continues to consolidate testing frequency tables. The California adoption via CCR Title 19 remains the operational reference, but the direction of NFPA 72 is clearer than ever: annual inspection of all initiating devices, semi-annual on select supervisory functions, quarterly for supervising station paths where required, and sensitivity testing every five years on smoke detectors. Get your inspection records in a queryable digital format now if they are not already.
5. Wireless (low-power radio) devices
Mesh wireless fire alarm has matured. The 2025 edition treats wireless survivability, battery supervision, and jamming detection with more prescriptive language. For retrofits in historic or occupied spaces where conduit is impractical, wireless is a fully code-compliant option — but the design documentation and battery replacement schedule need to be treated as first-class deliverables.
6. Cybersecurity language
NFPA 72 2025 continues the alignment with UL 2900-2-3 and general cybersecurity best practice for connected life-safety systems. If your fire alarm panel touches your building network — and most modern panels do — expect network-segmentation, access-control, and firmware-management expectations to appear in AHJ conversations.
What to do this quarter
- Ask your service provider which NFPA 72 edition your annual inspection reports reference. If it is still 2016 or 2019, request an update to at least 2022.
- Pull one voice-EVAC space and measure STI. If it comes in below 0.50 in an assembly area, you have a gap worth documenting.
- Confirm your supervising station path. If either leg is POTS, plan the migration now.
- Confirm your fire alarm panel firmware is current and that its network path is segmented from general IT traffic.
NFPA 72 changes rarely require a rip-and-replace, but they shift what "compliant on paper" and "defensible in a real event" mean. The 2025 edition raises both bars slightly — and this is the year to align.