Which of the following defines the term 'makeup air' in the context of commercial kitchens?

In the context of commercial kitchens, 'makeup air' refers specifically to the air that is brought into a space to replace the air that has been exhausted. When exhaust systems remove air—often laden with heat, smoke, steam, and cooking odors—makeup air is necessary to maintain proper ventilation rates and ensure that negative pressure does not occur within the kitchen. Negative pressure can lead to issues such as backdrafting of combustion appliances, difficulty with door operation, and inadequate airflow for optimal kitchen environment and equipment function.

This concept is critical for ensuring that the kitchen operates safely and effectively, as it helps to maintain balance in the air distribution within the space. Proper makeup air systems ensure that the kitchen remains adequately ventilated, protecting both health and safety standards, as well as ensuring operational efficiency.