Laboratory Fume Hood Face Velocity Calculator

Calculate face velocity and airflow for laboratory chemical fume hoods.

Width of fume hood opening.
ft
Height of open sash.
ft
Desired face velocity (80-120 FPM typical).
FPM

Results

Hood Face Area-ft²
Required Exhaust Airflow-CFM
Air Changes in 8 ft Hood-ACH
References: ANSI/AIHA Z9.5, Laboratory Ventilation; ASHRAE Handbook - HVAC Applications, Chapter 16