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Frequently Asked Question - Definition of Common Cleanroom Terms
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Super ULPA (ultralow penetration air) Filters
An extended medium, dry type filter in a rigid frame, made with
filter medium having a minimum particla collection efficiency of >
99.9999% ( i.e., a maximum particle penetration of < 0.0001%) for
particles of the most penetrating particle size (MPPS) when tested
at the average medium velocity in the filter in accordance with the
methods of IEST-RP-CC021
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