Following DRAFT of the ISO14644 series standards were published in September/October 2014 and are now available as an International Draft Standard:
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ISO DIS 14644-1.2 (2014): Cleanrooms and associated controlled environments — Part 1: Classification of air cleanliness by particle concentration
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ISO DIS 14644-2.2 (2014): Cleanrooms and associated controlled environments — Part 2: Monitoring to provide evidence of cleanroom performance
related to air cleanliness by particle concentration -
ISO/DIS 14644-14: Cleanrooms and associated controlled environments - Part 14: Assessment of suitability for use of equipment by airborne particle concentration
More info on
www.iest.org