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NFPA 96 Hood Cleaning Frequency: How Often Your Kitchen Really Needs It

January 14, 2026 · 6 min read

NFPA 96 does not give every kitchen the same schedule. Frequency is tied to how much you cook and what you burn, and getting it wrong is the most common reason a kitchen fails a fire inspection.

Below: NFPA 96 Hood Cleaning Frequency: How Often Your Kitchen Really Needs It — explained the way our crews handle the work in the field, written by the Enviroclean Works team in metro Atlanta.

Technician pressure-washing a stainless steel commercial kitchen hood to bare metal at night

The four NFPA 96 intervals

Standard 96 sets inspection frequency for the entire exhaust system, and the cleaning follows whenever grease is present. In practice, inspectors expect these intervals:

  • Monthly: solid fuel cooking such as wood-fired ovens and charcoal grills
  • Quarterly: high-volume operations, 24-hour kitchens, charbroilers and wok lines
  • Semi-annual: most full-service restaurants with moderate volume
  • Annual: low-volume kitchens like churches, day cares and seasonal venues

How to tell you are overdue

Grease depth is the real measure. If a fingernail leaves a visible track on the hood interior, plenum or the first duct run, you are past due regardless of the calendar. Other signals include a smoke haze on the line, grease dripping at the filters, slower air draw and a fan that sounds heavier than usual.

What documentation your inspector wants

Every cleaning should leave behind a dated certification sticker on the hood, a written service report listing what was and was not accessible, and photos of the hood, duct and fan. Insurers increasingly ask for the same file after a claim, so keep at least two years of reports.

Setting a schedule that sticks

Pick the interval that matches your heaviest cooking station, not your average one, and book the whole year at once. Recurring overnight visits keep the system from ever reaching the grease depth that turns a routine clean into an expensive one.

Services this guide applies to

If you would rather we handle it, these are the services behind everything described above.

Compare all of them on the services page.

Book this work in your city

We clean commercial kitchen exhaust systems across metro Atlanta and Columbus, GA. Pick your city for local scheduling and inspection notes.

Full coverage list on the service areas page.

Frequently asked questions

Does NFPA 96 require a certified company?
It requires cleaning by properly trained, qualified and certified persons. Ask for proof of training and liability insurance before work begins.
Is a filter-only cleaning enough?
No. Filters are the easiest part to reach, but the code covers the hood, plenum, ductwork and fan. A filter-only service leaves the fuel load in place.

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About Enviroclean Works

Enviroclean Works is a commercial kitchen exhaust cleaning company working across metro Atlanta and Columbus, Georgia. Our crews clean hoods, filters, grease ducts, exhaust fans and rooftop grease containment to NFPA 96 standards, then leave behind before-and-after photos, a service sticker and a report your fire inspector and insurance carrier will accept. We work after close so the cook line is ready for the next shift, and we schedule restaurants, schools, hospitals, hotels, food trucks, ghost kitchens and apartment amenity kitchens on the cleaning frequency their volume actually requires.

Every quote is scoped from your equipment, roof access and cooking volume rather than a flat price list. Send your kitchen details through the quote form on any page and we will come back with the scope, the schedule and the price.