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  • Meek, J., Miholland, D., and Litauszki, L., “Alternative Methods for HEPA Filter Leak Detection,” Pharmaceutical Engineering, March/April 2011, Vol. 31, No. 2, pp. 22-32,

  • Bryan, E., Kitch, B., Meek, J., Milholland, D. and Nance, N., “Alternative Test Methodology for In-Situ Testing of ePTFE HEPA Filters for Pharmaceutical Applications,” Pharmaceutical Engineering, November/December 2011, Vol. 31, No. 6,

  • Hope, D., Milholland, D., “A Three-Dimensional Ultrasonic Anemometer to Measure the Performance of Clean Zone Air Delivery Systems,” Journal of the IES, November/December 1993.

Supporting Literature

  • Gail, L., Schmidt, M., and Hemel, H., “Development and current state of installed HEPA filter leak testing,” European Journal of Parental & Pharmaceutical Sciences, 2004, Vol. 19, No. 4, pp. 143-145,

The following is a list of standards that address and discuss filter leak testing using particle counters:

  • EN 1822 “HEPA/ULPA Filters”

  • IEST-RP-CC034 “HEPA and ULPA Filter Leak Tests”

  • ISO 14644-3 “Test Methods”

  • ISO 29463 “High-efficiency filters and filter media for removing particles from air”

  • VDI 2083-3 “Cleanroom technology, Metrology and test methods” Verein
    Deutscher Ingenieure; Association of German Engineers

  • NEBB “Procedural Standards for Certified Testing of Cleanrooms”

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