CFM ↔ Air Changes per Hour
Convert between airflow (CFM, m³/h) and air changes per hour (ACH) for a room of any size.
Formula
ACH = airflow × 60 ÷ room volume (CFM, ft³) · ACH = m³/h ÷ m³Convert between airflow (CFM, m³/h) and air changes per hour (ACH) for a room of any size.
ACH = airflow × 60 ÷ room volume (CFM, ft³) · ACH = m³/h ÷ m³