All clean air and containment industries require testing of HEPA filter systems that protect people, products, and the environment.
ISO 14644-3 specifies test methods for cleanrooms and associated controlled environments, including leak testing of HEPA filters using an aerosol challenge like DEHS or PAO. This Dispersed Oil Particle (DOP) test is critical to ensuring the integrity of filtration systems, except in microelectronics. It’s used to identify leaks in the filter media or housing and is a globally recognized method. Although it seems simple, it can actually be quite complex.