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.

Instructions:

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:
1. Enter the area directly
2. Enter the length and width of the room
Click the Calculate button
The results will be displayed in the results window

Methodology:

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]

Air Change Rate