Kitchen Hood Exhaust Rate

Calculate required exhaust airflow for commercial kitchen hoods based on appliance type and hood configuration.

1=Type I (grease), 2=Type II (heat/steam only)
1=Wall canopy, 2=Island canopy, 3=Proximity/backshelf, 4=Eyebrow
Length of hood opening
feet
Width/depth of hood opening
feet
1=Light, 2=Medium, 3=Heavy, 4=Extra Heavy

Results

Hood Area-ft²
Exhaust Rate-CFM/ft²
Total Exhaust Required-CFM
References: IMC Section 507 - Commercial Kitchen Hoods, ASHRAE HVAC Applications Ch. 33 - Kitchen Ventilation