ISO 14644-3:2019 serves as the current international standard for defining test methods to evaluate the performance of cleanrooms and clean zones. The standard establishes critical testing procedures for airflow, filter leakage, and environmental factors across as-built, at-rest, and operational occupancy states. For more information, visit ISO Store.
General Principles: This part of the standard outlines the basic principles for cleanroom design, operation, and monitoring. It provides a framework for achieving and maintaining controlled environments. iso 146443pdf 2021
Confusing Part 3 with Part 1
The standard specifies test methods for two primary airflow types—unidirectional (laminar) and non-unidirectional (turbulent)—across three critical occupancy states: General Principles : This part of the standard
Although the official year is 2019, many 2021 document bundles refer to: quantitative analysis (e.g.
| Aspect | 2005 Version | 2019 Version | |--------|--------------|----------------| | Airflow visualization | Basic guidance | Advanced methods using laser sheet, fog generators, quantitative analysis (e.g., vector diagrams) | | Filter leakage | Discrete particle counter or photometer | Added scanning methods for HEPA/ULPA, clearer acceptance criteria | | Recovery test | Generic procedure | Improved for unidirectional & non-unidirectional airflow | | Containment leak | Limited | Expanded for isolators, glove ports, transfer systems | | Instrument requirements | General | Specific resolution, sampling rates, calibration intervals |