The 2021 version (published as a Preliminary Work Item) represents a substantial revision. The original 2004 version remains confirmed until the new version is finalized.
The standard specifies recommended test procedures and apparatus for verifying air cleanliness and other performance parameters in cleanrooms. It covers both unidirectional and non-unidirectional airflow across three occupancy states: as-built, at-rest, and operational Key Updates in the Latest Edition
The physical infrastructure and manufacturing machinery are fully installed and operating, but personnel are absent. iso 146443pdf 2021
Cleanrooms are often defined by their "ISO Class," a designation from ISO 14644-1
The term "ISO 146443pdf 2021" is a clear but slightly informal search for the ISO 14644-3 test method standard. Many users seek the "2021" version because , after an important correction was issued in 2020. The 2021 version (published as a Preliminary Work
This part consolidates terms and definitions from across the ISO 14644 and ISO 14698 (biocontamination) series into a single reference document. Each definition is followed by the standard designation and section where it is used, and an index facilitates quick lookup of specific terms. The 2021 revision ensures terminology remains consistent across all parts as the series continues to expand, harmonizing terms, definitions, and units within ISO Standards 14644 and 14698.
The standard does not mandate that testing be performed by an external third party. However, tests should be performed by qualified personnel with appropriate training and calibrated equipment. Many organizations choose to use independent, accredited cleanroom testing service providers to ensure impartiality and technical expertise. This part consolidates terms and definitions from across
: Better alignment with modern particle counters, discrete-particle counters (DPCs), and condensation nucleus counters (CNCs). Key Cleanroom Test Methods Outlined in the Document