How Often Should a Commercial Kitchen Hood Be Cleaned? NFPA 96 Frequency by Cooking Volume

"How often do we actually need this cleaned?" is the first question most operators ask — and the honest answer is: it depends on what and how much you're cooking, not a flat calendar interval.

NFPA 96's General Frequency Guidance

NFPA 96 ties cleaning frequency to cooking volume and fuel type rather than a single blanket schedule. As general guidance:

• Solid fuel cooking (charbroilers, wood or charcoal): monthly
• High-volume cooking (24-hour kitchens, wok cooking, heavy charbroiling): quarterly
• Moderate-volume cooking (most full-service restaurants): semi-annually
• Low-volume cooking (seasonal kitchens, churches, day camps): annually

Your local fire marshal or authority having jurisdiction (AHJ) makes the final call on what applies to your specific kitchen — this is general guidance, not a substitute for your local requirement.

Why Volume Matters More Than a Calendar Date

Two restaurants with the same square footage can have wildly different grease accumulation rates depending on menu, cooking method, and hours of operation. A high-volume charbroil operation running double shifts accumulates grease far faster than a low-volume café — which is exactly why NFPA 96 scales frequency to cooking activity instead of a flat interval for every kitchen.

What Happens If You're Overdue

Beyond the fire-risk implications, an overdue hood system is one of the more common findings during a fire marshal or insurance inspection — and it can affect your ability to pass inspection or maintain coverage. If you're not sure when your system was last cleaned, that's worth finding out before an inspector asks.

Arizona Hood & Vent Cleaning assesses your kitchen's actual cooking volume and sets a schedule to match — see our hood cleaning service for details, or request a quote to get started.