The entire kitchen exhaust system includes the hood, filters, fan and all associated horizontal and vertical ductwork.
The grease and particulate buildup in the kitchen exhaust system is a fire hazard. This also impacts on the efficiency and lifetime capabilities of other adjacent kitchen equipment, plus other mechanical equipment. According to the National Fire Protection Association, “the majority of restaurant fires originate on the kitchen cooking appliances and flare into the kitchen exhaust system. If the entire exhaust system is not cleaned, a significant risk for fire exists whenever cooking appliances are used.”