While there is no standalone ISO 14644-3:2021 (the standard was majorly revised in and corrected in

What is ISO 14644-3? A Brief Overview

ISO 14644 is a multi-part standard for cleanrooms and associated controlled environments. Part 3 (officially titled “Cleanrooms and associated controlled environments — Part 3: Test methods”) specifies the testing procedures to prove that a cleanroom meets the required classification ISO 14644-1.

Essential for sterile manufacturing, this test uses non-residue smoke/fog to prove that air moves from "clean" to "dirty" areas without turbulence that could deposit particles on critical surfaces. Significant 2019/2021 Changes vs. Previous Editions

To ensure successful implementation of ISO 14644-1:2021, manufacturers should:

ISO 14644-3: Cleanroom Testing & Measurement Standards | Camfil AU