Air Flow Rates

16 Jan 2013

Air Flow Rates

For detailed information on Air Flow Velocity Rates, contact a CRW specialists to get specific answers to your project.

Class per ISO 14644
(Old FS 209 e)
Average Airflow
(Across Entire Room)
Air Changes
(per hour)
ISO 8
(Class 100,000)
0.005 – 0.041 m/sec
(1 – 8 ft/min)
5 – 48
ISO 7
(Class 10,000)
0.051 – 0.076 m/sec
(10 – 15 ft/min)
60 – 90
ISO 6 (Class 1,000) 0.127 – 0.203 m/sec
(25 – 40 ft/min)
150 – 240
ISO 5 (Class 100) 0.203 – 0.406 m/sec
(40 – 80 ft/min)
240 – 480
ISO 4 (Class 10) 0.254 – 0.457 m/sec
(50 – 90 ft/min)
300 – 540
ISO 3 (Class 1) 0.305 – 0.457 m/sec
(60 – 90 ft/min)
360 – 540
ISO 2 and cleaner 0.305 – 0.508 m/sec
(60 – 100 ft/min)
360 – 600

Note: Actual average velocity and air changes required may vary depending on the application, floor plan and number of personnel. Typical face velocity from the filter is 90 feet per minute. Average airflow is determined by airflow readings from several interior points.

For more information on ceiling filter coverage, contact CRW to find out how our design experts can help achieve your environment goals. By email at info@cleanroomswest.com; Or by phone at 800-772-6634

Comments are closed.