Core TradesQuestion 198 of 700

A ducted residential kitchen range hood that exhausts to the outdoors is commonly required to move a MINIMUM intermittent airflow of about:

a.50 cfm
b.100 cfm
c.300 cfm
d.500 cfm

Explanation

A ducted range hood is commonly required to provide at least 100 cfm of intermittent exhaust to remove cooking moisture and odors. 50 cfm is a bathroom-level rate, and 300 to 500 cfm are high-capacity hoods that exceed the basic minimum.

Law Reference: 2025 CA Mechanical Code, Chapter 5 (Exhaust Systems)

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