Restaurant kitchen hood cleaning removes grease, smoke residue, and fire hazards from your exhaust system — and it's required by law. This guide covers what professional hood cleaning involves, how much it costs, and how to hire a certified service that keeps you compliant and safe.
What Kitchen Hood Cleaning Actually Involves
Kitchen hood cleaning is the complete degreasing of your exhaust system, from the visible hood and filters down through the ductwork to the exhaust fan on your roof. A certified technician disassembles accessible components, applies industrial degreasers, and scrapes away accumulated grease that poses a fire risk. The process typically takes 3–6 hours depending on system size and grease buildup.
Professional cleaners inspect the entire exhaust path, not just the parts you can see from the kitchen. They remove filters, clean the plenum (the area above the filters where grease collects), scrub duct interiors with rotating brushes, and degrease the exhaust fan blades and housing. Every surface that comes in contact with grease-laden vapors must be cleaned to bare metal.
The work happens after hours — usually between 10 PM and 6 AM — to avoid disrupting service. Technicians cover cooking equipment with protective sheeting, use containment systems to prevent water and degreaser from spreading, and restore your kitchen to operational condition before morning prep begins.
After cleaning, the service provider affixes a certification sticker to your hood showing the service date and the name of the technician. This sticker is your proof of compliance during health and fire inspections. Some jurisdictions require before-and-after photos as additional documentation.
How Often You Need Hood Cleaning
NFPA 96 — the fire code standard for commercial kitchen ventilation — sets minimum cleaning frequencies based on cooking volume. High-volume operations using solid fuel (charcoal, wood) must clean monthly. Systems serving wood or charcoal grills need quarterly cleaning. Moderate-volume kitchens require cleaning every six months, and low-volume operations (churches, day camps, seasonal businesses) can extend to annual cleaning.
Your fire marshal or health inspector determines your classification based on menu, hours of operation, and cooking methods. A 24-hour diner running multiple fryers falls into a more frequent category than a bakery that only uses convection ovens. Inspectors measure grease buildup during visits — if accumulation exceeds 1/8 inch anywhere in the system, you're out of compliance regardless of your last cleaning date.
Most insurance claims related to kitchen fires are denied when the restaurant cannot produce current hood cleaning certificates showing compliance with NFPA 96 standards.
Some operators clean more frequently than required as a safety margin. A barbecue restaurant might clean every six weeks instead of quarterly to prevent excessive buildup. The cost of extra cleanings is negligible compared to the risk of a duct fire or failed inspection that forces you to close.
What Kitchen Hood Cleaning Costs
Expect to pay $400–$800 for a standard 10–12 foot hood system with moderate grease accumulation. Pricing increases with system length, duct complexity, roof access difficulty, and the amount of grease present. A large kitchen with multiple hoods and long duct runs can reach $1,500–$2,500 per cleaning.
Service providers typically quote based on linear footage of hood coverage, number of exhaust fans, and frequency. A monthly cleaning contract costs less per visit than one-time service because regular maintenance prevents heavy buildup that requires extra labor. Companies offer package pricing that includes grease trap service, filter exchange programs, and compliance tracking.
Schedule your first cleaning with a new provider at least two weeks before an anticipated health inspection. This allows time to address any access issues or system deficiencies they discover during service.
Geographic location affects pricing significantly. Urban markets with higher labor costs charge 20–30% more than rural areas. Emergency same-day service typically adds a 50–100% premium. Some contractors include minor repairs (fan belt replacement, hinge lubrication) in their base price, while others bill separately for parts and labor.
Annual costs for a moderate-volume restaurant average $2,400–$4,800 when cleaning quarterly. Budget an additional $200–$400 per year for filter replacement or exchange service. These expenses are non-negotiable operating costs — skipping cleanings doesn't save money when one fire can destroy your business.
How to Hire a Certified Hood Cleaning Service
Start by verifying the company holds current liability insurance with kitchen exhaust cleaning coverage. General liability policies often exclude this specialized work, leaving you exposed if a fire starts during or shortly after cleaning. Request a certificate of insurance naming your business as additionally insured before any work begins.
Confirm technicians are certified through IKECA (International Kitchen Exhaust Cleaning Association) or a similar accrediting body. Certification proves they understand NFPA 96 requirements and proper cleaning techniques. Ask how long the assigned technician has worked for the company — high turnover often indicates poor training or substandard working conditions that affect service quality.
Never hire a company that offers to "spray only" or skip duct interiors to reduce cost. Incomplete cleaning leaves you non-compliant and creates a false sense of security while fire risk remains.
Get detailed written proposals from at least three providers. The quote should specify exactly what's included: hood, filters, plenum, full duct length, exhaust fan, and rooftop grease containment. Proposals that lack this detail often lead to surprise charges or incomplete service. Compare apples to apples — the cheapest bid may exclude ductwork or fan cleaning.
Ask for references from similar operations in your area. A company experienced with high-volume steakhouses may not suit a small café, and vice versa. Check online reviews focusing on reliability, communication, and whether they show up as scheduled. Hood cleaning happens overnight when you can't supervise directly, so trustworthiness matters.
Review the service contract carefully before signing. It should specify frequency, scope of work, cancellation terms, and what happens if the technician finds code violations or system damage. Some contracts automatically renew with price increases — understand the terms before committing to a multi-year agreement.
For more guidance on maintaining compliance across all kitchen systems, visit the GreasetrapLocator blog for additional resources on grease management and commercial kitchen maintenance.
Common Problems Hood Cleaning Uncovers
Professional cleaners frequently discover fire code violations during service: missing access panels that prevent complete duct cleaning, damaged fan belts that reduce exhaust efficiency, or holes in ductwork that leak grease into wall cavities. These issues must be corrected to maintain compliance and safety.
Improper hood installation is another common finding. Some kitchens have hoods that are too short to cover all cooking equipment, or exhaust fans undersized for the heat and grease load. These deficiencies can't be corrected by cleaning alone — they require equipment modification or replacement.
Rooftop grease containment systems often need repair or replacement. The hinged grease cup that catches runoff may be rusted through, or the exhaust fan's grease drain may be clogged. A good cleaning company alerts you to these problems and can provide quotes for correction, though you're free to hire a separate contractor for repairs.
Frequently Asked Questions
How long does kitchen hood cleaning take?
Professional hood cleaning takes 3–6 hours for a standard system, depending on size and grease buildup. Larger kitchens with multiple hoods and extensive ductwork may require 8–10 hours. Service happens after hours to avoid disrupting operations.
Can I clean my kitchen hood myself instead of hiring a service?
You cannot self-certify compliance with NFPA 96, which requires professional cleaning by certified technicians. Daily filter cleaning and hood wiping are your responsibility, but complete system degreasing requires specialized equipment, training, and certification documentation that satisfies inspectors and insurance requirements.
What happens if I skip hood cleaning?
Skipping required hood cleaning results in failed health inspections, potential closure orders, voided fire insurance coverage, and dramatically increased fire risk. Fines for non-compliance range from $500–$5,000 depending on jurisdiction. One duct fire causes far more damage than years of cleaning costs.
Do hood cleaning companies also clean grease traps?
Many hood cleaning companies offer grease trap service, but they're separate systems requiring different equipment and expertise. Some contractors bundle services for operational convenience. Ask specifically what's included — hood cleaning quotes don't automatically include trap service.
How do I know if my hood was actually cleaned properly?
Request before-and-after photos of duct interiors and the exhaust fan. A properly cleaned system shows bare metal surfaces with no grease residue. The certification sticker should include the technician's name and license number. You can verify certification through IKECA's online directory.
Find verified grease trap services in your area at https://www.greasetraplocator.com
Author: Grease Trap Locator Editorial Team
The Grease Trap Locator editorial team covers FOG compliance, grease trap maintenance, and commercial kitchen regulations across the US and Canada. Our guides are written for restaurant owners, facility managers, and food service operators who need practical, accurate information without the fluff.
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