If you are a quality or facility manager: from your local ISO member. Consider it an audit insurance policy.
This test measures the velocity of airflow within the cleanroom to ensure it meets design requirements for maintaining a controlled environment.
Reference lists for required apparatus (like particle counters and anemometers) are typically found in Annex C of the standard. specific test procedure iso 146443pdf
is the globally recognized international standard that specifies the precise test methods required to evaluate the performance of cleanrooms , clean zones, and associated controlled environments. While ISO 14644-1 handles the specific classifications of air cleanliness based on particle concentration, Part 3 details the concrete "how-to" metrology, equipment configurations, and mathematical parameters necessary to validate and maintain those environments. Organizations looking to download or review the ISO 14644-3 PDF usually focus on mastering its core test protocols—such as HEPA filter integrity leakage testing, airflow mapping, and room recovery validation—to ensure compliance with ISO Central Secretariat baselines.
Sites like IHS Markit or SAI Global carry the standard. If you are a quality or facility manager:
The document was updated in 2020 to correct errors found in the initial 2019 publication. How to Find the ISO 14644-3 PDF
Standardized methods ensure your annual or semi-annual audits are consistent. Troubleshooting: Organizations looking to download or review the ISO
Beyond Particles: Master Your Cleanroom with ISO 14644-3 If you work in a cleanroom, you already know about ISO 14644-1 (the "what"—particle limits) and ISO 14644-2
A cleanroom technician in a bunny suit standing next a particle counter.
that list the 14 specific tests required by the standard, including: Airflow velocity and volume tests Air pressure difference tests Installed filter leakage tests (Integrity testing) Recovery tests American National Standards Institute (ANSI)