Core TradesQuestion 41 of 700
In a dwelling, makeup air must generally be provided for a kitchen exhaust hood once its rated airflow exceeds about:
a.400 CFM
b.150 CFM
c.100 CFM
d.50 CFM
Explanation
Hoods exhausting more than about 400 CFM can depressurize a tight house and backdraft combustion appliances, so makeup air is required above that threshold. The lower values are typical small-fan flows that do not trigger the requirement.
Law Reference: 2025 CA Mechanical Code (CMC) §505 (Domestic Range Hoods)Practice all 700 questions free — no signup required.
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