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For the model law, see Uniform Limited Partnership Act.

ULPA is an acronym for "ultra-low penetration air." ULPA may also be used to refer to ultra low particulate air.[citation needed] A ULPA filter can remove from the air at least 99.999% of dust, pollen, mold, bacteria and any airborne particles with a size of 120 nanometres (0.12 µm) or larger.

A number of recommended practices have been written on testing these filters including

IEST-RP-CC001: HEPA and ULPA Filters,

IEST-RP-CC007: Testing ULPA Filters,

IEST-RP-CC022: Testing HEPA and ULPA Filter Media, and

IEST-RP-CC034: HEPA and ULPA Filter Leak Tests.[1]

See also[edit]


  1. ^ "IEST Recommended Practices". IEST. 2007-12-03. Retrieved 2008-01-14. 

External links[edit]