PREN ISO 14644-1 : DRAFT 2010

1 Scope
2 Normative reference
3 Definitions
4 Classification
5 Demonstration of compliance
Annex A (normative) - Reference method for
        determination of air cleanliness classification
        by particle concentration
Annex B (informative) - Worked examples of classification
        calculations
Annex C (informative) - Considerations for counting and
        sizing of particles outside the size range applicable
        for classification
Annex D (informative) - Sequential sampling procedure
Annex E (informative) - Illustration of the ISO cleanliness
        classes
Bibliography

Gives the classification of air cleanliness in cleanrooms and associated controlled environments exclusively in terms of concentration of airborne particles.