Ultra-Low Particulate Air (ULPA) Filters are more efficient than HEPA filters.
Synonym: penetration air filter
Goal: removal of 99.995% or greater of contaminants >= 0.12 microns in diameter
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Designation
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Efficiency Percentage
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U15
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>= 99.9995%
|
|
U16
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>= 99.99995%
|
|
U17
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>= 99.999995%
|
percent efficiency =
= (1 - ((downstream concentration) / (upstream concentration))) * 100%
