Air Curtain Sizing Calculator

Size air curtains for doorways to minimize infiltration and maintain building pressurization. Commonly used for loading docks and retail entrances.

Height of the doorway opening.
feet
Width of the doorway opening.
feet
Temperature inside the building.
°F
Temperature outside the building.
°F
Average wind speed at doorway.
mph
0.5 for occasional use, 0.75 for frequent, 1.0 for continuous.

Results

Door Area-ft²
Minimum Air Velocity-FPM
Required CFM-CFM
Heat Loss Prevented-BTU/hr
References: ASHRAE Fundamentals Chapter 16: Ventilation and Infiltration; AMCA 220: Air Curtain Units