Many users in a group may obtain values close to the labeled NRR, but a substantial portion typically do not. The only way to determine a person's attenuation level is with a fit test system. Editor's ...

The Occupational Safety and Health Administration (OSHA) on Sept. 25 issued a final rule approving two additional quantitative fit testing protocols for inclusion in its Respiratory Protection ...

Do you work in an environment where the air is unfit to breathe? Does your workplace have a plan for and provide you with the assurance you'll be safe while at work? What can you do to ensure you're ...

Quantitative fit testing is the preferred testing method. The ambient aerosol condensation nuclei counting (CNC) method, using a Portacount® Plus instrument, has been selected as the quantitative fit ...

Please provide your email address to receive an email when new articles are posted on . Nearly 100% of N95 masks pass fit tests after 3 years, suggesting annual tests are not necessary. Moving to ...