Internal hood joints, seams, filter support frames, and appurtenances attached inside the hood shall be ________ or ______________.

• A. sealed
• B. greasetight
• C. sealed or greasetight
• D. sealed or otherwise made greasetight

Answer: (D)

Interior hood joints, seams, filter support frames, and appurtenances inside the hood must be constructed so grease cannot pass through them. They should be sealed or made greasetight so that grease is not able to seep into hidden cavities or into the ductwork, which reduces fire risk and facilitates cleaning. Sealed means restricting openings, and if a simple seal isn’t feasible, these components must be otherwise made greasetight by approved methods—such as properly gasked joints, tightly welded seams, or other code-approved constructions—so the interior remains grease-tight. This ensures that every potential grease leakage point inside the hood is addressed, maintaining safety and cleanliness.