What is the OSHA protection factor for a half mask respirator?

The OSHA protection factor for a half mask respirator is 10. This means that when a properly fitted half mask respirator is used, it can reduce the concentration of hazardous substances in the air inhaled by the wearer by a factor of 10.

A half mask respirator typically covers the nose and mouth, allowing it to filter out particulates and some gases or vapors, depending on the type of filter used. The protection factor indicates how much more air can be safely inhaled in a contaminated environment compared to unprotected breathing, emphasizing the importance of using appropriate respiratory protection in hazardous work environments.

Understanding this protection factor is critical for correctly assessing the level of respiratory protection needed based on the concentration of hazardous substances present in the workplace.