Measures the speed and uniformity of air moving through the cleanroom.
This test confirms that filters are properly installed, that there is no bypass leakage, and that filters are free of defects. iso 146443pdf
ISO 14644-3 is a part of the ISO 14644 series, which provides guidelines for the design, construction, and operation of cleanrooms and associated controlled environments. Specifically, ISO 14644-3 focuses on the "Assessment of airborne molecular contamination in cleanrooms and associated controlled environments". Measures the speed and uniformity of air moving
Understanding Air Cleanliness? You need ISO 14644-1. that there is no bypass leakage