This part of ISO 14644 specifies the requirements for the design, construction, and start-up of cleanrooms and associated controlled environments. Cleanrooms are defined as rooms and enclosures, and their associated controlled environments, in which the concentration of airborne particles is controlled to meet a specified airborne cleanliness class.
ISO 14644-4:2001(E) Cleanrooms and associated controlled environments -- Part 4: Design, construction and start-up iso 14644 4 pdf
This annex provides guidance on the design and construction of cleanrooms and associated controlled environments. This part of ISO 14644 specifies the requirements
This annex provides examples of cleanroom configurations and their associated controlled environments. and their associated controlled environments
Here's a text based on the standard:
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