What is the minimum width of a discharge opening for a grease duct serving a type one hood?

The minimum width of a discharge opening for a grease duct serving a type one hood is established to ensure effective ventilation and safety in commercial kitchens where grease-laden vapors can accumulate. A discharge opening that measures at least 10 inches is necessary to facilitate adequate airflow and prevent any potential fire hazards associated with grease buildup. This wider opening helps maintain a proper exhaust flow rate, efficiently removing smoke, heat, and odors from cooking processes, while also adhering to safety codes and regulations relevant to kitchen ventilation systems.

In contrast, smaller widths, such as 6 or 8 inches, would not provide sufficient capacity for the volume of grease-laden air produced by cooking appliances under a type one hood. This inadequacy could hinder performance, leading to inefficiencies in odor and smoke removal and increasing fire risks. Therefore, the requirement for a 10-inch minimum width is critical for ensuring safety and compliance in commercial kitchen environments.