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A mask someone could wear for hours will never block all smells. Even in a N99 you still smell gases and other small things
by redisman 5y ago
A mask someone could wear for hours will never block all smells. Even in a N99 you still smell gases and other small things
- omgitsabird 5y agoYou can wear a SCBA for hours. You can also find P100 cartridges that eliminate smells from VOCs and "gases".
- OrvalWintermute 5y agoYou are comparing very different standards e.g. https://www.cdc.gov/niosh/npptl/topics/respirators/disp_part/default.html https://www.cdc.gov/niosh/npptl/topics/respirators/disp_part... N95 – Filters at least 95% of airborne particles. Not resistant to oil. Surgical N95 – A NIOSH-approved N95 respirator that has also been cleared by the Food and Drug Administration (FDA) as a surgical mask. N99 – Filters at least 99% of airborne particles. Not resistant to oil. N100 – Filters at least 99.97% of airborne particles. Not resistant to oil. R95 – Filters at least 95% of airborne particles. Somewhat resistant to oil. P95 – Filters at least 95% of airborne particles. Strongly resistant to oil. P99 – Filters at least 99% of airborne particles. Strongly resistant to oil. P100 – Filters at least 99.97% of airborne particles. Strongly resistant to oil. Additionally, see https://www.ecfr.gov/current/title-42/part-84 https://www.ecfr.gov/current/title-42/part-84