Sounds like a simple question and often the answer is easy when dealing with reputable respirator manufacturers; however, the idea that providing a PAPR to a worker assures a higher protection factor is just wrong.  When we look at OSHA’s Assigned Protection Factors (APF) in 1910.134(d)(3)(i)(A) we see Table 1. – Assigned Protection Factors where … Continue reading What is the ACTUAL assigned protection factor for Powered Air Purifying Respirators (PAPR) WITHOUT a tight-fitting face piece?