QLFT vs QNFT: Which Respirator Fit Test Method Do You Need? (2026)
OSHA 29 CFR 1910.134 requires annual fit testing for all workers who use tight-fitting respirators — but the regulation allows two fundamentally different methods: QLFT (qualitative) and QNFT (quantitative). Both satisfy the annual requirement for most half-face respirators. The right choice…