Cooking equipment is the leading cause of commercial kitchen fires.

Cooking equipment, deep fryers, ranges, ovens, grills, and the grease hoods above them, causes 61% of all restaurant fires: roughly 4,500 fires a year, more than 100 civilian injuries, and about $165 million in property damage annually. It is the single largest fire-cause category in commercial kitchens, by a wide margin, and it is driven almost entirely by two things: unattended cooking, and grease buildup in exhaust systems that never got cleaned on schedule.

For property managers: it's not just the tenant's problem.

If you manage a building with commercial-tenant kitchens, a non-compliant hood or exhaust system in one unit is not contained to that unit. Grease fires travel through shared duct and ventilation infrastructure, and the liability for a building-wide incident does not stop at a tenant's lease line. Coordinating hood-cleaning compliance tenant by tenant, or worse, not coordinating it at all and trusting each operator to manage their own schedule, means the building's actual fire risk is only as good as its least-compliant kitchen.

For restaurant owners: this is the place you built.

Every independent kitchen owner has put years into the place they run: the menu, the regulars, the reputation. A grease fire doesn't just damage equipment. It can close the doors on all of it, sometimes for good. The two most common causes, unattended cooking and grease buildup in the exhaust system, are also the two most preventable: one is a staffing and training discipline, the other is a scheduled hood-cleaning program that actually gets followed.

Why the exhaust system specifically matters.

Grease that accumulates inside a hood, duct, or rooftop fan is not just dirty. It's a documented ignition source, which is the entire reason NFPA 96 sets mandatory cleaning frequencies rather than leaving it to housekeeping judgment. A kitchen that's current on hood cleaning has already addressed one of the two biggest drivers behind that 61% figure. A kitchen that isn't, hasn't.

Northfire covers NFPA 96 hood and exhaust cleaning across every commercial kitchen in a portfolio, on one schedule. See how a building compliance review works →