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2. NIOSH air filtration rating - Wikipedia

   en.wikipedia.org/wiki/NIOSH_air_filtration_rating

   During the COVID-19 pandemic, the mask and respirator market rapidly grew, along with counterfeit respirators. [1] NIOSH, on behalf of the Department of Health and Human Services, filed a trademark application on June 17, 2020, for various 42 CFR 84 trademarks, including the N95, allowing NIOSH to enforce rules on counterfeit masks outside of rules defined in 42 CFR 84.

3. Chemical cartridge - Wikipedia

   en.wikipedia.org/wiki/Chemical_cartridge

   A respirator cartridge or gas mask canister is a type of filter that removes gases, volatile organic compounds (VOCs), and other vapors from the air through adsorption, absorption, or chemisorption. It is one of two basic types of filters used by air-purifying respirators. The other is a mechanical filter, which removes only particulates ...

4. European respirator standards - Wikipedia

   en.wikipedia.org/wiki/European_respirator_standards

   EN 14683 defines respirators for use in medical settings, [4] while European standard EN 143 defines the 'P' classes of particle filters that can be attached to a face mask, which are P1, P2, and P3. The EN 143 filters are typically used on reusable respirators, like elastomeric respirators. [5] EN 14387 is the chemical cartridge standard in ...

5. The 10 Best N95 Masks on Amazon, Plus 4 Top-Rated KN95s - AOL

   www.aol.com/lifestyle/10-best-n95-masks-amazon...

   Best-Fitting N95 Mask: Benehal N95 Mask. Best N95 Protective Mask: 3M 8210 Particular Respirator. The Best KN95 Masks on Amazon At a Glance. Best KN95 Mask With Adjustable Ear Loops: ChiSip KN95 ...

6. Respirator assigned protection factors - Wikipedia

   en.wikipedia.org/wiki/Respirator_Assigned...

   Example of measurement of efficiency of the respirator (in the workplace). Description: (1) personal sampling pump, (2) the cassette and the filter for determining the concentration (in the breathing zone), (3) the sampling line (from the breathing zone), (4) the cassette and the filter to determine the concentration (under a mask), and (5) the sampling line (from the mask).

7. What type of mask works best against COVID-19? Where ... - AOL

   www.aol.com/type-mask-works-best-against...

   As omicron spreads, experts say N95, KN95 and other respirator masks do the best job of blocking ... At the same time, the question of which type of mask to wear has grown increasingly complicated ...