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Cleanroom Classification Tables
Discover the different classes within the cleanroom ISO standards and their Federal Standard and GMP equivalent. These tables detail the air changes and particle counts that define each class.
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Comparison of Cleanroom Classifications
Cleanroom Standard | Cleanroom Classification Guidelines | |||||
---|---|---|---|---|---|---|
ISO 14644-1 | Class 3 | Class 4 | Class 5 | Class 6 | Class 7 | Class 8 |
Federal Standard 209E | 1 | 10 | 100 | 1,000 | 10,000 | 100,000 |
EU GMP | - | - | A/B | - | C | D |
For cleanrooms and clean zones.
ISO 14644-1:2015 Cleanroom Classification
ISO Classification Number | Maximum allowable concentrations (particles/m3) for particles equal to and greater than the considered sizes, shown below | |||||
---|---|---|---|---|---|---|
≥0.1µm | ≥0.2µm | ≥0.3µm | ≥0.5µm | ≥1µm | ≥5.0µm | |
ISO Class 1 | 10b | d | d | d | d | e |
ISO Class 2 | 100 | 24b | 10b | d | d | e |
ISO Class 3 | 1,000 | 237 | 102 | 35b | d | e |
ISO Class 4 | 10,000 | 2,370 | 1,020 | 352 | 83b | e |
ISO Class 5 | 100,000 | 23,700 | 10,200 | 3,520 | 832 | d,e,f |
ISO Class 6 | 1,000,000 | 237,000 | 102,000 | 35,200 | 8,320 | 293 |
ISO Class 7 | c | c | c | 352,000 | 83,200 | 2,930 |
ISO Class 8 | c | c | c | 3,520,000 | 832,000 | 29,300 |
ISO Class 9g | c | c | c | 35,200,000 | 8,320,000 | 293,000 |
For cleanrooms and clean zones shown in ISO 14644-1:2015
Cleanroom Limits for Airborne Particulate Contamination
Cleanroom Standard | Maximum permitted number of particles /m³ | ||||
---|---|---|---|---|---|
EU GMP Grade | ISO 14644-1 | At rest ≥0.5µm | At rest ≥5.0µm | In operation ≥0.5µm | In operation ≥5.0µm |
A | 5 | 3,520 | 20 | 3,520 | 20 |
B | 5 | 3,520 | 29 | 352,000 | 2,900 |
C | 7 | 352,000 | 2,900 | 3,520,000 | 29,000 |
D | 8 | 3,520,000 | 29,000 | Not defined | Not defined |
For cleanrooms and clean zones
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