NFPA 96 Cleaning Frequencies, Explained for Kitchen Managers

"How often do we have to clean the hood?" is the question every kitchen manager asks, and NFPA 96 — the standard fire marshals inspect against — answers it by what and how much you cook, not by a single rule for everyone.

The four bands

Monthly — systems serving solid-fuel cooking (wood, charcoal, mesquite). Solid fuel produces the heaviest, most flammable deposits. Quarterly — high-volume cooking: 24-hour kitchens, charbroilers, wok lines, high-throughput fry operations. Semi-annually — moderate-volume cooking, the band most full-service restaurants land in. Annually — low-volume operations such as seasonal kitchens, day camps and small church or social-hall kitchens.

Why the band matters more than the calendar

Grease loading is what an inspector is really judging. A quarterly kitchen that stretches to five months is carrying two extra months of fuel in its duct. A low-volume kitchen cleaning quarterly is spending money it does not need to spend. The honest answer for your kitchen comes from an inspection of the system itself — how much grease is present, and how fast it got there since the last clean.

Frequency is only half the requirement

The other half is proof. A kitchen on the right frequency with no sticker, no certificate and no photos has a story; a kitchen with a documented service history has a record. Every Eagle visit produces the certificate, the dated hood sticker and the before-and-after set, so the frequency you are on is the frequency you can prove.

Not sure which band your kitchen is in? A free inspection settles it — we photograph the system, measure it against your menu and hours, and put the recommended frequency in writing.