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Air Change Rate Calculator
Adicot, Inc.'s Air Change Rate Calculator is a powerful tool for calculating the air changes per hour (ACH) in a room or building. Our calculator is easy to use and provides accurate results for a variety of applications. Whether you're an engineer, architect, or building owner, our calculator can help you determine the ventilation needs of your space.
Select English or SI Units
Select Input Criteria - the calculator will solve for the other value.
Air Flow Rate
Air Change Rate
Enter the room height
Select how to enter the room area:
Enter the area directly
Enter the length and width of the room
Click the Calculate button
The results will be displayed in the results window
Q = ACH x V / C
ACH = Q / V x C
where: Q = Aif flow rate, CFM [l/s]
ACH= Air change rate, 1/hr
V = Room Volume ft^3 [m^3]
C= 60 min/hr [3.6 m^3 x sec /l/hr]