I have been validated!  I have received so many nasty grams from folks regarding my position on the ASSUMED PAPR Assigned Protection Factor of 1,000 which I wrote about in several postings going all the way back to 2015 of which this was my first attempt to educate and warn others of some flawed practices: … Continue reading Redemption – Clarification on powered-air purifying respirators (PAPR), their assigned protection factor, and Footnote 4