What is the minimum intermittent mechanical ventilation rate of required outdoor air for a residential kitchen?

What is the minimum intermittent mechanical ventilation rate of required outdoor air for a residential kitchen?

• A. 50 CFM
• B. 75 CFM
• C. 100 CFM
• D. 125 CFM

Answer: (C)

The key idea is the minimum outdoor airflow needed to adequately remove cooking pollutants when the kitchen range hood is used intermittently. For a residential kitchen, the standard minimum for intermittent operation is 100 CFM. This ensures enough capture and exhaust of heat, moisture, and grease produced during typical cooking. Choosing 50 CFM or 75 CFM would risk insufficient ventilation for normal cooking loads, leading to buildup of odors, humidity, and particulates. While 125 CFM is also acceptable and may be chosen for larger or more intense cooking needs, the question asks for the minimum, so 100 CFM is the correct baseline.

The key idea is the minimum outdoor airflow needed to adequately remove cooking pollutants when the kitchen range hood is used intermittently. For a residential kitchen, the standard minimum for intermittent operation is 100 CFM. This ensures enough capture and exhaust of heat, moisture, and grease produced during typical cooking.

Choosing 50 CFM or 75 CFM would risk insufficient ventilation for normal cooking loads, leading to buildup of odors, humidity, and particulates. While 125 CFM is also acceptable and may be chosen for larger or more intense cooking needs, the question asks for the minimum, so 100 CFM is the correct baseline.