Commercial kitchen hood and exhaust system cleaning is one of the most legally consequential cleaning requirements for Las Vegas restaurant owners. NFPA 96 — the National Fire Protection Association’s standard for ventilation control and fire protection in commercial cooking operations — establishes mandatory cleaning frequencies, and non-compliance can result in failed health inspections, insurance policy voidance, and in the event of a fire, personal liability for the owner. Understanding what’s required, how it’s done, and how to choose a qualified vendor protects both your business and your customers.

Required Cleaning Frequencies

NFPA 96 establishes minimum cleaning frequencies based on cooking volume: monthly for high-volume solid-fuel cooking (wood, charcoal); quarterly for high-volume grease-producing cooking (typically: restaurants with significant fryer and flat-top use operating full-service hours); semi-annually for moderate-volume operations; annually for low-volume operations such as church kitchens, seasonal facilities, or day-use operations. Most full-service Las Vegas restaurants fall in the quarterly category. Your cleaning company should assess your specific cooking type and volume and recommend the appropriate frequency — over-cleaning is wasteful; under-cleaning is a fire risk and code violation.

What the Cleaning Process Covers

Professional hood cleaning covers: the interior of the hood canopy including all surfaces, baffles, and filters; the exhaust ductwork from the hood to the roof — the full vertical run of ductwork must be cleaned, not just the accessible section visible from the kitchen; the exhaust fan(s) on the roof, including fan blades, housing, and the area around the roof penetration; the exterior of the hood visible from the kitchen. The grease is removed using hot water pressure washing and chemical degreaser, typically applied from the top down so loosened grease flows toward contained catch areas at the base.

Documentation and Inspection Stickers

After every cleaning, the service company is required to leave a dated, signed sticker inside the hood documenting the cleaning date and the areas cleaned. This sticker is what Southern Nevada Health District inspectors check — its absence is a violation regardless of how recently the system was cleaned. Reputable hood cleaning companies always provide this documentation. Keep copies of your service invoices as additional documentation. If an inspector finds the sticker missing, request the documentation from your vendor and post it immediately.

Choosing a Qualified Vendor in Las Vegas

Use only hood cleaning companies that carry appropriate licensing, workers’ compensation insurance, and general liability insurance. Ask for references from other Las Vegas restaurant clients. A legitimate hood cleaning company will provide access to all areas of the ductwork — if a vendor quotes cleaning only the visible hood sections without ductwork access, they’re not doing code-compliant work. The roof fan and ductwork sections above the kitchen are where the most significant grease accumulation occurs and where fire typically initiates in kitchen exhaust fires. Comprehensive cleaning of the full system from hood to roof exhaust is the only compliant and truly safe approach.