Where air moves in a single direction at a uniform velocity.
This standard ensures that whether you are in pharmaceuticals, microelectronics, or aerospace, your cleanroom is functioning exactly as designed. Purpose and Scope of ISO 14644-3 iso 146443pdf
The installation is complete with all services connected, but no equipment or personnel are present. Where air moves in a single direction at a uniform velocity
Where air movement is more turbulent or mixed. Three Occupancy States: but no personnel are present.
The installation is complete with equipment installed and operating, but no personnel are present.