Commercial Kitchen Hood Cleaning Schedule by Cuisine Type(NFPA 96 Table 11.4)

NFPA 96 Table 11.4 sets the minimum hood cleaning frequency for commercial kitchens based on cooking volume and type — not on how the hood looks or how long since the last cleaning. This is not optional: your fire suppression inspector will check grease accumulation levels and will check for a current hood cleaning certificate. A dirty hood can fail your suppression inspection, and accumulated grease in an uncleaned duct is the leading cause of cooking-related structure fires in the U.S.

This guide translates NFPA 96 Table 11.4 into practical guidance for specific cuisine types, explains what happens when you skip cleanings, and covers what to look for when hiring a hood cleaning contractor.

The NFPA 96 frequency chart

NFPA 96 Table 11.4 defines four cleaning frequency tiers based on cooking operation type and volume. Every commercial kitchen must be able to identify which tier applies to their operation and maintain cleaning records accordingly.

By cuisine type — practical guide

The NFPA 96 categories are defined by cooking method and volume, not by cuisine label. This guide maps common cuisine types to the appropriate NFPA 96 tier based on the typical cooking methods involved. When a cuisine type involves multiple cooking methods that fall into different tiers, default to the most frequent (strictest) requirement.

What happens if you skip cleanings

The consequences of deferred hood cleaning compound over time and span fire safety, insurance, legal liability, and direct inspection failure:

• Grease fire risk escalates non-linearly. A 1/8-inch grease deposit in a duct is a fire hazard. A 1/2-inch deposit, which can accumulate in a few months in a high-volume kitchen without cleaning, is a sustained fire threat that can carry fire from the exhaust duct to the roof structure. Grease duct fires are among the most dangerous kitchen fires precisely because they travel silently through walls and ceilings before anyone knows the building is on fire.
• Failed suppression inspection. Inspectors check visible grease accumulation on hood filters and baffles. Excessive accumulation — or a missing or outdated cleaning certificate — is a direct NFPA 96 violation that results in a failed inspection and a correction notice. Repeated failures attract more frequent unannounced inspections.
• Insurance implications. Most commercial property policies include a warranty that you maintain your kitchen exhaust system per NFPA 96. A grease duct fire that occurs while you are out of compliance with the cleaning schedule is grounds for an insurance carrier to deny or reduce a claim. Get the cleaning certificate after every service and file it in your documentation binder.
• Suppression system warranty voided. Most suppression system manufacturers include hood cleaning compliance in their warranty terms. An overdue cleaning can void your coverage under the manufacturer's service agreement and may affect how your contractor documents the semi-annual inspection.

Choosing a hood cleaning contractor

Not every cleaning company that offers hood cleaning is qualified under NFPA 96. Here is what to look for when hiring:

• IKECA certification. The International Kitchen Exhaust Cleaning Association (IKECA) certifies hood cleaning contractors and technicians. An IKECA-certified contractor has demonstrated training in NFPA 96 cleaning procedures. Not every reputable contractor is IKECA-certified, but it is the recognized industry credential.
• Before and after photos. Any professional hood cleaning contractor should provide photographic documentation of the duct condition before cleaning and after cleaning. These photos are evidence of compliance and should be kept with your cleaning certificate.
• A written service report with certification number. The NFPA 96 §11.6.14 cleaning certificate must include the technician's name and certification number. A receipt or invoice without this information is not NFPA 96-compliant documentation.
• Documented coverage of the full duct run. Hood cleaning that only addresses the visible hood and filters — but does not clean the duct run up to the exhaust fan and fan housing — is incomplete. Ask specifically whether the duct run and exhaust fan are included in the scope.
• A deficiency report for items outside their scope. A thorough cleaning contractor will note any physical deficiencies they observe — damaged filters, failing gaskets, deteriorated duct joints — even though they are not licensed to repair them. This is a sign of a professional operation.

Typical cleaning cost for a single-hood kitchen runs $300–$800. Restaurants with multiple hoods and long duct runs should budget $600–$1,500. Prices vary by market and by the level of grease accumulation — a kitchen that has been cleaned on schedule will cost less than one that hasn't been cleaned in 18 months.