Not legal advice
NFPA standards are copyrighted consensus documents. What is enforceable is the edition your city or state has adopted, plus any local amendments. Confirm requirements with your fire marshal (the AHJ) and a licensed inspector. HoodInspect does not sell code books and does not interpret them for a specific occupancy.
What NFPA 17A covers
NFPA 17A, Standard for Wet Chemical Extinguishing Systems, is about the suppression equipment itself. Wet-chemical systems are the UL 300 pre-engineered packages installed over commercial cooking appliances — brands such as Ansul, Kidde, and Range Guard. The standard addresses design, installation, inspection, testing, and maintenance of that equipment.
In a typical six-month visit the technician works the 17A side of the job: agent level and cartridge or stored pressure, fusible links (heat-sensitive detectors) replaced on schedule, nozzle caps and aiming, the detection cable or conduit, the control head, the manual pull, and the fuel/electrical shutoffs that must trip if the system discharges. When the visit is complete they date-tag the system. That tag is what fire marshals look for. See the six-month tag guide for how that tag is used on the floor.
17A does not tell you how often to degrease a duct. It does not license the technician; states and cities do that. It also does not make one manufacturer "code required" over another — the installed, listed system is what must be maintained.
What NFPA 96 covers
NFPA 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, is broader. It covers the hood, grease filters, ducts, fans, access panels, clearances, and the fire protection that sits over cooking that produces grease-laden vapors. Suppression is one piece of that picture, not the whole standard.
The overlap kitchen operators care about is inspection frequency. NFPA 96 requires fire-extinguishing equipment that protects cooking operations to be inspected and serviced in accordance with NFPA 17A, but not less than semiannually. In plain language: follow 17A, and do not stretch the interval past about six months unless the adopted edition and the AHJ say otherwise. That is the origin of the six-month tag.
NFPA 96 also addresses hood cleaning — how often grease is removed from hoods, ducts, and fans. Those intervals vary with the type and volume of cooking. That is a different trade, a different certificate, and a different sticker. A cleaning company cannot apply a suppression inspection tag unless it is also a licensed fire-equipment firm authorized on that system.
How the two standards work together
| Topic | NFPA 17A | NFPA 96 |
|---|---|---|
| Primary subject | Wet-chemical extinguishing systems | Cooking ventilation and fire protection |
| Six-month inspection | Inspection, testing, and maintenance of the system | Requires that work at least semiannually, per 17A |
| Hood / duct greasing | Not the focus | Cleaning intervals for hoods, ducts, fans |
| Who you hire | Licensed, often factory-authorized suppression technician | Suppression tech for the tag; hood cleaner for grease |
Operators get cited when they confuse the two. A current hood-cleaning invoice does not satisfy a fire marshal looking at an expired 17A tag. An on-time suppression tag does not mean the duct is clean. Schedule both. They can be the same company only if that company is actually licensed for both trades.
The six-month tag, in practice
After a passing inspection the technician affixes a dated tag showing when the system was serviced and, typically, a license or company identifier. AHJs look for that tag on walk-throughs, complaint inspections, and license renewals. Operating without a current tag can mean a violation, a mandatory reinspection, a shutdown order, or an insurance problem — outcomes vary by city.
Identify the system brand before you book; factory parts and fusible links are brand-specific. Use the Ansul vs Kidde identification guide if the cylinder nameplate is unfamiliar.
Find an inspector by city
HoodInspect lists licensed kitchen suppression inspectors — not hood cleaners — in:
- Dallas, Texas
- Houston, Texas
- Atlanta, Georgia
- Miami, Florida
- New York City, New York
- Los Angeles, California
Always confirm the license number on the listing with the state fire marshal or contractor board. HoodInspect does not invent certifications.
Frequently asked questions
- What is the difference between NFPA 17A and NFPA 96?
- NFPA 17A is the standard for wet chemical extinguishing systems — the tank, piping, nozzles, detection, and how that equipment is inspected and maintained. NFPA 96 is the standard for ventilation control and fire protection of commercial cooking operations — hoods, ducts, exhaust, grease, and the requirement that cooking-line fire-extinguishing equipment be inspected at least semiannually in accordance with NFPA 17A.
- Does NFPA 96 require a six-month kitchen suppression tag?
- NFPA 96 requires fire-extinguishing equipment protecting cooking operations to be inspected and serviced in accordance with NFPA 17A, but not less than semiannually. In practice that is the six-month tag fire marshals look for on the wet-chemical system. Local amendments and the AHJ control what is enforceable in a given city. This is not legal advice.
- Is a hood-cleaning certificate the same as an NFPA 17A inspection?
- No. Hood cleaning (often discussed under NFPA 96 grease-removal intervals) degreases ducts, fans, and plenums. An NFPA 17A inspection certifies the wet-chemical system: agent, fusible links, nozzles, detection, and shutoffs. A cleaning sticker does not tag the suppression system.
- Who enforces NFPA 17A and NFPA 96?
- The local authority having jurisdiction (AHJ) — typically the fire marshal — adopts and enforces these standards as written into local code. State licensing boards separately license the companies that perform the work. HoodInspect is a directory, not the AHJ.
Schedule the six-month inspection
Find a licensed wet-chemical inspector in your city. This is not hood cleaning.
Read the six-month tag guide