What feature is essential for every underground grease duct according to installation guidelines?

In the context of underground grease ducts, the inclusion of a cleanout is crucial for effective maintenance and compliance with installation guidelines. Grease ducts are designed to carry flammable cooking byproducts from commercial kitchens safely out of the building. Over time, these ducts can accumulate grease buildup, which presents a significant fire hazard. A cleanout provides easy access for cleaning and inspection, allowing for the removal of any collected grease and ensuring that the duct remains unobstructed and safe.

This maintenance feature is vital not only for fire prevention but also contributes to the longevity and efficiency of the duct system. Regular cleaning through the cleanout helps maintain optimal airflow and reduces the risk of unpleasant odors or health hazards associated with grease accumulation. For these reasons, a cleanout is considered an essential feature for every underground grease duct, aligning with best practices for safety and compliance in mechanical installations.