CFM Converter
Convert airflow between cubic feet per minute (CFM), liters per second (L/s), and cubic meters per hour (m3/h).
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Airflow is measured in different units depending on region.
Conversion factors:
- 1 CFM = 0.4720 L/s (liters per second)
- 1 CFM = 1.6990 m3/h (cubic meters per hour)
- 1 L/s = 2.1189 CFM = 3.6 m3/h
- 1 m3/h = 0.5886 CFM = 0.2778 L/s
Common HVAC airflow values:
- Bathroom fan: 50-110 CFM (24-52 L/s)
- Kitchen range hood: 100-400 CFM (47-189 L/s)
- Central AC (per ton): 400 CFM (189 L/s)
- Whole house fan: 3,000-6,000 CFM (1,416-2,832 L/s)
Ventilation standards:
- ASHRAE recommends 15-20 CFM per person for office spaces.
- Residential: about 0.35 air changes per hour.