Air Change Rate Calculator
Calculate air changes per hour (ACH) from airflow rate and room volume with recommendations by room type.
Inputs
Results
Air Changes / Hour
8
Full Exchange Time (min)7.5
Recommended Min ACH4
Recommended Max ACH6
Meets Minimum (1=Yes, 0=No)1
How to Use This Calculator
- Enter Airflow Rate (CFM), Room Volume (ft³), and Room Type.
- Review the Air Changes / Hour result.
- Use Full Exchange Time (min) and Recommended Min ACH to inform your decision.
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