According to the federal regulatory agenda, the Department of Health and Human Services (HHS) and NIOSH are finalizing major updates to respirator certification standards under 42 CFR Part 84. Targeted for a final rule in November 2026, NIOSH is establishing a new approval class for CURs. These advanced hybrid devices integrate an open-circuit Self-Contained Breathing Apparatus (SCBA) with air-purifying (APR or PAPR) capabilities within a single unit. Historically, 42 CFR Part 84 prohibited approving devices that spanned multiple respirator classes. The new standard incorporates by reference NFPA 1987 (Standard on Combination Unit Respirator Systems for Tactical and Technical Operations). NIOSH is also finalizing permanent performance standards for the “PAPR100” class. Originally introduced via an interim rule in 2020, this standard allows for smaller, lighter-weight powered air-purifying particulate systems without sacrificing filtration efficiency, significantly reducing physiological burden during extended wear.