1. See also

2. References

3. External links

ULPA is an acronym for "Ultra Low Particulate Air (filter)" An ULPA filter can remove from the air at least 99.999% of dust, pollen, mold, bacteria and any airborne particles with a size of 100 nanometres (0.1 µm) or larger.

A number of recommended practices have been written on testing these filters, including:^[1]

• 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.

See also

• High-efficiency particulate arrestance (HEPA)
• Minimum efficiency reporting value (MERV)
• Microparticle performance rating (MPR)

References

External links

• ULPA Filter Efficiency Chart: Sentry Air Systems
• European Standard for HEPA & ULPA Filters — EN 1822
• EN 1822: the standard that greatly impacted the European cleanrooms market

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