HVAC Journeyman Practice Exam

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At what angle should grease filters be installed in commercial cooking hoods?

30 degrees
45 degrees
60 degrees
90 degrees

The correct answer is: 60 degrees

Grease filters used in commercial cooking hoods are typically installed at a 45-degree angle. This angle is optimal because it allows for effective capture and removal of airborne grease, smoke, and particles produced during cooking. The sloped design encourages the grease-laden vapors to condense and drain back into the hood system rather than escaping into the kitchen environment. By installing the filters at this angle, there is a larger surface area exposed to the airflow, which increases filtering efficiency. Additionally, this installation helps to prevent grease accumulation that can lead to potential fire hazards. A steeper or less steep angle, such as 30, 60, or 90 degrees, would not provide the same level of effectiveness in separating grease from the cooking vapors, potentially compromising both the safety and air quality in a commercial kitchen setting.