Is Kitchen Exhaust Cleaning the Same as Hood Cleaning?

Restaurant owners often ask if a standard hood cleaning covers the ductwork and the roof fan, or just the metal canopy over the cooking equipment. People commonly say "hood cleaning," but NFPA 96 requires cleaning the entire exhaust system.

This includes everything from the canopy to the upblast exhaust fan on the roof. Hire a crew to only wash the visible hood canopy and you leave highly flammable grease trapped inside the ductwork. A complete exhaust cleaning guarantees compliance with fire codes and protects your building from catastrophic fires.

Key Takeaways

• "Hood cleaning" and "exhaust cleaning" are used interchangeably, but fire codes require servicing the entire system.
• Clean only the visible hood canopy and you guarantee an inspection failure and create a severe fire hazard.
• NFPA 96 Chapter 11.6.2 mandates that all exhaust system surfaces must be cleaned to bare metal.
• Service costs range from 400 USD for a simple hood to 3000 USD for complex multi-story ductwork.
• The local Authority Having Jurisdiction (AHJ) can shut down your kitchen if the hidden ductwork is ignored.

The Difference Between Hood Cleaning and Exhaust Cleaning

The hood is just the metal canopy inside the kitchen. The exhaust system includes the hood, the plenum, the vertical and horizontal ductwork, and the upblast exhaust fan on the roof.

NFPA 96 Chapter 11 mandates that the entire system must be cleaned. Clean only the hood canopy and you leave highly flammable grease in the hidden ductwork. Ignore the ductwork and you guarantee an inspection failure when the fire marshal checks the system. A certified exhaust cleaner services the entire grease vapor path.

What is included in a hood cleaning service?

A compliant service covers every component in the grease vapor path. Crews must remove and clean the baffle filters, scrape the plenum, pressure wash the ductwork, and clean the fan blades.

The NFPA 96 standard Chapter 11.6.2 requires all surfaces to be cleaned to bare metal. According to NFPA 96 Annex B, a grease depth of just 0.002 inches (50 microns) triggers the requirement for a cleaning. Allow buildup to reach the critical hazard depth of 0.078 inches (2000 microns) and you violate fire codes and create an immediate risk. Crews use heavy-duty degreasers and hot water pressure washers to achieve the bare metal standard.

NFPA 96 Kitchen Exhaust Code and Documentation Requirements

Fire marshals and insurance providers enforce NFPA 96 standards rigorously. Table 11.4 outlines the exact inspection frequencies based on cooking volume and fuel type. If an inspection reveals grease buildup, the system must be cleaned immediately. The local Authority Having Jurisdiction (AHJ) has the final say on commercial kitchen hood cleaning code requirements and can shut down a kitchen if the exhaust system poses a fire hazard.

Documentation is just as critical as the physical cleaning. NFPA 96 Chapter 11.6.13 requires a service decal placed on the hood canopy showing the date of service and the name of the exhaust cleaning company. Crews must also provide a detailed post-service report with before and after photos. If any part of the system is inaccessible, the cleaning company must report this directly to the property owner and the AHJ.

How often should kitchen exhaust be cleaned?

Cleaning intervals depend strictly on the type of cooking operation. Systems serving solid fuel cooking operations require a 1 month inspection and cleaning cycle. High volume operations like 24 hour diners or charbroiling restaurants require a 3 month cycle.

Moderate volume kitchens need a 6 month cycle. Low volume spaces like churches or seasonal camps require a 12 month cycle. You can learn more about scheduling in our guide on NFPA 96 hood cleaning frequency.

How much does it cost to have a commercial kitchen hood cleaned?

Pricing depends on the size of the hood and the accessibility of the system. A standard 10 foot hood in a single-story building typically costs between 400 USD and 600 USD per service.

Larger hoods or kitchens with multiple cooking zones will push the price closer to 1000 USD. Crews factor in the time required to protect the kitchen equipment with plastic sheeting before washing begins. Proper grease containment during the wash adds to the labor time.

How much does exhaust cleaning cost?

When ductwork is complex, the total exhaust cleaning cost increases significantly. Multi-story buildings with long vertical duct runs require specialized equipment and extra labor. Cleaning a system with 50 feet of ductwork and multiple access panels can cost between 1500 USD and 3000 USD.

Lack of proper access panels is a frequent compliance issue that forces crews to cut new doors. Installing these panels adds 150 USD to 300 USD per panel installed. You can review detailed pricing models in our restaurant hood cleaning cost guide.

Finding Certified Commercial Kitchen Hood Cleaning Near Me

Restaurant owners must verify that a cleaning company holds a recognized credential from organizations like IKECA (CECS), Phil Ackland, or MFS. Uncertified crews often act as "hood polishers" who clean the shiny metal in the kitchen but ignore the roof fan.

Hiring an uncertified crew can void your insurance policy if a grease fire occurs in the uncleaned ductwork. Always ask for proof of liability insurance and a guarantee that they clean the entire system to bare metal. Check your current service reports and verify that the crew provided photos of the ductwork and roof fan. If your last service only included photos of the hood canopy, schedule a complete exhaust inspection immediately to ensure your system meets fire codes.