USNIOSHN95

USNIOSHN95 is the designation used to refer to NIOSH-approved N95 filtering facepiece respirators in the United States. The N95 classification indicates that the respirator filters at least 95% of non-oil aerosols under specific testing conditions, typically using a sodium chloride aerosol. These respirators are designed to fit over the nose and mouth to reduce inhalation of airborne particles and are used across healthcare, industry, and emergency response settings.

Certification and standards: NIOSH certifies these respirators under 42 CFR Part 84. Models receive a TC-84A approval number and must meet requirements for filtration efficiency, breathing resistance, and compatibility with other components. The NIOSH seal and approval number are printed on the respirator and its packaging. Filtration performance is tested with laboratory aerosols, and oil-based aerosols are excluded from the N95 classification; there are separate classes (P, R) for oil resistance.

Fit and usage: Proper fit is essential; many workplaces require fit testing and a user seal check before use. The respirator must form a tight seal on the face and be disposed of when damaged or contaminated. Facial hair or poor seal can reduce effectiveness. It is intended for non-oil aerosols and offers no protection against gases or vapors; not a substitute for surgical masks in sterile environments unless specifically certified for that context.

Limitations and considerations: NIOSH certification confirms filtration performance but does not guarantee protection in all settings. Reuse and decontamination practices vary; some models are designed for limited reuse or specific decontamination methods under guidance. In shortages or high-risk environments, alternatives include elastomeric respirators and powered air-purifying respirators.