Where air moves in a single direction at a uniform velocity.
The international standard is a critical document for any industry that relies on contamination-controlled environments. While ISO 14644-1 focuses on the classification of air cleanliness by particle concentration, Part 3 specifies the actual test methods used to characterize the performance of cleanrooms and clean zones. iso 146443pdf
The installation is functioning in the specified manner with the specified number of personnel working. Key Testing Procedures Where air moves in a single direction at a uniform velocity
The installation is complete with equipment installed and operating, but no personnel are present. but no personnel are present.