Before revision: Units Typical units to express airflow are: By volume l / s (litres per second ) m3/h (cubic metres per hour) ft3/h (cubic feet per hour) ft3/min (cubic feet per minute, a.k.a.
After revision: Units Typicam3 units to express airflow are: By volume l / min (cubic metres per minute ) m3/h (cubic metres per hour) ft3/h (cubic feet per hour) ft3/min (cubic feet per minute, a.k.a.