Which of the following statements about grease duct clearances is true?

Greater clearances enhance safety because they help reduce the risk of fire hazards associated with grease ducts. Grease ducts can accumulate flammable substances such as grease and other debris, which can ignite if they are too close to combustible materials or even if they overheat during operation. By maintaining greater clearances, the chance of heat transfer to adjacent structures is minimized, thereby lowering the likelihood of a fire occurring.

This safety measure is codified in the relevant mechanical codes, which specify the necessary distances between grease ducts and combustible materials. These guidelines are essential for ensuring effective ventilation and preventing potential fire hazards that can arise from cooking environments.