Cleanrooms, utilized in industries like healthcare, pharmaceuticals, and electronics manufacturing, rely heavily on High-Efficiency Particulate Air (HEPA) filters to maintain their stringent cleanliness standards. These filters, capable of trapping 99.97% of particles that are 0.3 microns in diameter, are subjected to regular tests to ensure optimal function and compliance with regulatory requirements. The tests help in early identification of filter degradation or failure, thereby facilitating timely replacements and maintaining the controlled environment's integrity, crucial for the successful operation of cleanroom activities.