ISO 14644-1 covers the classification of air cleanliness in cleanrooms and associated controlled environments. Classification in accordance with this standard is specified and accomplished exclusively in terms of concentration of airborne particulates. The document was submitted as an American National Standard and has been adopted as ANSI/IEST/ISO 14644-1:1999 in the United States, following the cancellation of FED-STD-209E.
Part 2 specifies requirements for periodic testing of a cleanroom or clean zone to prove its continued compliance with ISO 14644-1 for the designated classification of airborne particulate cleanliness. It also specifies requirements for the monitoring of a cleanroom or clean zone (installation) to provide evidence of its continued compliance with ISO 14644-1 for the designated classification of airborne particulate cleanliness. It became an International Standard following the cancellation of FED-STD-209E. In the United States in 2000 it was adopted as ANSI/IEST/ISO 14644-2:2000.
This part specifies test methods for designated classification of airborne particulate cleanliness and for characterizing the performance of cleanrooms and clean zones. These test methods are specified in the document for two different types of cleanrooms and clean zones; unidirectional flow and nonunidirectional flow.
The most important objectives of this highly referenced document are to provide an internationally common basis of measurement and evaluation of cleanrooms and, at the same time, not to prevent the introduction of new technologies.