Reference
NFPA — National Fire Protection Association
The actual NFPA 96 standard. Buying the current edition is the single highest-leverage purchase a new hood cleaner can make. Updated on a three-year cycle.
~$75 digital, ~$95 print
THE STANDARD
The standard that governs commercial kitchen exhaust systems in almost every U.S. jurisdiction. We'll break down what it actually requires — cleaning frequencies, access panels, grease-duct enclosures, documentation — and what fire marshals are looking for when they show up.
THE BASICS
NFPA 96 is the National Fire Protection Association's standard for ventilation control and fire protection of commercial cooking operations. It is the answer to the question 'how do we keep kitchens from burning down?'
NFPA 96 covers every part of your exhaust system: the hood, the filters, the vertical duct run, the rooftop fan, and the suppression system above the line. It sets rules for how each is designed, maintained, inspected, and documented. If you cook with grease-laden vapors, NFPA 96 applies to you.
It does not tell you how the cleaning must be performed — it tells you the system must end up in a specific condition. A hood that's been wiped down with a paper towel doesn't meet NFPA 96 even if your filters are spotless, because the standard requires the entire system to be cleaned to bare metal (or as close as practicable) at the required frequency.
FREQUENCY
NFPA 96 Section 11.4 — the table that causes the most arguments between operators and inspectors.
| Operation | Minimum Frequency | Examples |
|---|---|---|
| Solid-fuel cooking | Monthly | Wood-fired pizza, mesquite grills, charbroiled barbecue |
| High-volume (24-hour operations, charbroiling, wok) | Quarterly (every 3 months) | 24-hour diners, charbroil-heavy concepts, ghost kitchens |
| Moderate-volume | Semi-annually (every 6 months) | Most sit-down restaurants, hotel kitchens, catering halls |
| Low-volume (seasonal kitchens, churches, day camps) | Annually | Seasonal concessions, churches, temporary kitchens |
Your local AHJ can require more frequent cleaning. They cannot require less.
WHAT GETS CHECKED
First thing checked. Date of last service, tech name, company, and the areas serviced. Missing sticker = automatic citation in most markets.
They will run a finger along the interior. More than 1/8" (0.125 inch / 3mm) of accumulated grease anywhere in the system is a violation.
NFPA 96 requires access panels every 12 ft of horizontal duct and at every change of direction. Missing access = the system can't be inspected end-to-end = violation.
UL 1046 grease-listed baffle filters. No mesh, no aluminum mesh, no paper — baffle filters only, installed vertically.
Combustible clearance rules depend on duct construction — usually 18" from unlisted duct, down to 0" with a listed grease duct. Inspectors carry a tape measure.
Gauge reading, tamper seals, fusible links not older than 6 months, nozzle caps intact. NFPA 17A applies here more than 96, but they cite both.
THE REFERENCE
NFPA publishes the document. You can access a read-only version for free — but for anyone actually working in this trade, buy a copy. The margins get filled in over time and that's how you learn it.
Reference
The actual NFPA 96 standard. Buying the current edition is the single highest-leverage purchase a new hood cleaner can make. Updated on a three-year cycle.
~$75 digital, ~$95 print
Certification
The trade association that writes the playbook most fire marshals trust. CECS and CESI are the most recognized hood-cleaning certifications in the U.S.
Membership from $475 / year; CECS exam ~$395
Training
Trainings on fire suppression systems (Ansul, Amerex). Useful add-on if you want to test and certify kitchen fire suppression alongside hood cleaning.
Some links on this page are affiliate links. If you buy through them, we may earn a small commission at no additional cost to you. We only recommend products and training we'd point a new operator toward anyway — the affiliate relationship doesn't buy a listing.
NFPA 96 says the system must be cleaned — it doesn't say who must clean it. That's where certifications come in. CECS is the credential your insurance carrier wants to see.
COMPARE CERTIFICATIONS →