What is the maximum allowable difference in inside dimensions for telescoping and bell-type connections?

The maximum allowable difference in inside dimensions for telescoping and bell-type connections, structured to ensure effective ventilation and safety in commercial cooking operations, is 1/4 inch. This precise measurement is crucial because it helps maintain the efficiency of the ventilation system, prevents leakage, and minimizes the risk of fire hazards associated with inadequate connections.

A gap greater than 1/4 inch could potentially compromise the performance of the exhaust system, allowing grease and smoke to escape and potentially leading to hazardous conditions. Thus, adhering to this standard is essential for ensuring compliance with safety regulations and maintaining the health of the system in commercial cooking environments.