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2. N95 respirator - Wikipedia

   en.wikipedia.org/wiki/N95_respirator

   OSHA (US) requires an initial respirator fit test to identify the right model, style, and size respirator for each worker; as well, as annual fit tests. Additionally, tight-fitting respirators, including the N95, require a user seal check each time one is put on. Facial hair at the sealing area of the respirator will cause it to leak. [38]

3. Respirator fit test - Wikipedia

   en.wikipedia.org/wiki/Respirator_fit_test

   However, it is not possible to fit test the disposable filtering face-piece mask (such as the N95, N99, and N100 masks) with CNP. Fit tests with an atmospheric aerosol may be used on any respirator, but the cost of earlier devices (PortaCount) and the duration of the test was slightly greater than CNP.

4. Powered air-purifying respirator - Wikipedia

   en.wikipedia.org/wiki/Powered_air-purifying...

   PAPRs have the advantage of eliminating breathing resistance caused by unpowered negative-pressure respirators such as N95 masks. This makes them usable by persons who are medically disqualified from negative-pressure respirators. [3] Loose-fitting PAPRs may also be selected for people who cannot pass a fit test due to facial hair or other reasons.

5. CDC guidelines on male facial hair goes viral amid the ... - AOL

   www.aol.com/news/cdc-guidelines-on-male-facial...

   The CDC explains that facial hair growing in areas covered by a respirator seal won’t allow a proper fit. In fact, “Facial hair is a common reason that someone cannot be fit tested ...

6. N95 Masks vs. KN95 Masks: Which Work Best to Protect ... - AOL

   www.aol.com/news/difference-between-n95-masks...

   Even if you have received your vaccine and booster, medical experts continue to promote the wearing of face coverings as an effective way to prevent the spread of Covid-19, the Omicron variant ...

7. Respirator - Wikipedia

   en.wikipedia.org/wiki/Respirator

   Beards can significantly affect the integrity of the respirator's face seal. Certain types of facial hair can reduce fit to a significant degree. For this reason, there are facial hair guidelines for respirator users. [113] This is another example of potential respirator non-compliance.

8. How Much Do Masks Really Cost? From Cloth to KN95, Here’s a ...

   www.aol.com/much-masks-really-cost-cloth...

   A pack of 10 industrial N95 masks found at hardware stores can be purchased for around $20 but a pack of 20 NIOSH-approved N95 respirators can cost around $29 and up. The CDC also advises ...

9. Respirator assigned protection factors - Wikipedia

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

   Fit testing of tight-fitting masks of negative-pressure respirators became widely used in US industry in 1980-s. At the beginning, it was thought that the half-mask fit quite well to the worker's face, if during a fit test the protection factor (fit factor) is not less than 10 (later, experts began to use "safety factor" = 10 during the fit ...