Why isnt there a HEPA filter for air-purifying respirators (APRs)?
A. In 1998, NIOSHs new set of regulations in 42 Code of Federal Regulations (CFR) 84also referred to as Part 84for testing and certifying nonpowered, air-purifying, particulate respirators went into effect. Certification requirements for all other classes of respirators were transferred to Part 84 without change. These other classes of respirators include: chemical cartridges, self-contained breathing apparatus [SCBA], airlines, gas masks without a particulate filter, powered air-purifying respirators [PAPRs] equipped with HEPA filters, etc.
A. In 1998, NIOSHs new set of regulations in 42 Code of Federal Regulations (CFR) 84—also referred to as Part 84 —for testing and certifying nonpowered, air-purifying, particulate respirators went into effect. Certification requirements for all other classes of respirators were transferred to Part 84 without change. These other classes of respirators include: chemical cartridges, self-contained breathing apparatus [SCBA], airlines, gas masks without a particulate filter, powered air-purifying respirators [PAPRs] equipped with HEPA filters, etc.
