Iso 14644-3.pdf Jun 2026
Each state requires different test acceptance criteria.
Disclaimer: This article is for informational purposes. Always refer to the official ISO 14644-3:2019 document for regulatory compliance. Iso 14644-3.pdf
The standard allows alternative methods if they can be proven equivalent or superior. For example, instead of a discrete particle counter for filter scanning, you could use a condensation nucleus counter (CNC) for higher sensitivity, provided you validate the method. Each state requires different test acceptance criteria
This tests the structure itself—not the filters. Do you have leaks through wall panels, cable penetrations, or ceiling grids? This test uses a tracer gas (like SF₆) or a liquid curtain to find hidden breaches. Iso 14644-3.pdf
