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  2. NIOSH air filtration rating - Wikipedia

    en.wikipedia.org/wiki/NIOSH_air_filtration_rating

    NPPTL is the designated publisher of the NIOSH Certified Equipment List, or CEL. The CEL is a public domain database that details the respirators currently approved by NIOSH, and is ordered separated based on type of respirator, which is designated with a schedule (e.g. TC-84A). [28] The CEL was initially released in paper form on September 30 ...

  3. Mechanical filter (respirator) - Wikipedia

    en.wikipedia.org/wiki/Mechanical_filter_(respirator)

    Since filters are tested against the by definition most penetrating particle size of 0.3 μm, an APR with a P100 classification would be at least 99.97% efficient at removing particles of this size. [N2] Particles with a size both less than and greater than 0.3 μm may be filtered at an efficiency greater than 99.97%.

  4. Respirator - Wikipedia

    en.wikipedia.org/wiki/Respirator

    The Hierarchy of Controls, noted as part of the Prevention Through Design initiative started by NIOSH with other standards bodies, is a set of guidelines emphasizing building in safety during design, as opposed to ad-hoc solutions like PPE, with multiple entities providing guidelines on how to implement safety during development [101] outside ...

  5. 9 NIOSH-Approved N95 Respirator Face Masks You Should ... - AOL

    www.aol.com/news/6-niosh-approved-n95-respirator...

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  6. Elastomeric respirator - Wikipedia

    en.wikipedia.org/wiki/Elastomeric_respirator

    Pink hard-case P100 particulate filter cartridges make their presence or absence conspicuous at a distance. Elastomeric respirators are examples of air-filtering respirators, in contrast to air-supplying respirators. Air-supplying respirators are usually positive-pressure, so they leak outwards, and thus offer better protection.

  7. Where to Find the Best NIOSH-Approved KN95, N95 and KF94 ...

    www.aol.com/where-best-niosh-approved-kn95...

    The surgical N95 is a NIOSH-approved N95 respirator that has also been cleared by the Food and Drug Administration as a surgical mask. KN95 masks are the Chinese equivalent of N95 masks and meet ...