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
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