Makeup air in a commercial kitchen must be approximately equal to what?

Makeup air in a commercial kitchen is designed to replace the air that is being exhausted from the space, particularly through kitchen hoods and other ventilation systems. This is crucial for maintaining a balanced airflow within the kitchen environment. When exhaust fans remove air, it creates a negative pressure that can lead to various issues including backdrafting of combustion appliances, contaminants being pulled into the space, and an overall discomfort for kitchen staff.

Therefore, the makeup air must be approximately equal to the amount of exhaust air to effectively neutralize these impacts and ensure a safe and efficient working environment. This balance supports proper ventilation, helps with temperature regulation, and contributes to the overall air quality in the kitchen, aligning with mechanical codes and best practices for commercial kitchen operations.