Air Purifying Respirator Use

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OSHA Standard:

1910.134, Respiratory protection

The OSHA respirator standard applies to all occupational airborne exposures to contaminated air where the employee is:


  • Exposed to a hazardous level of an airborne contaminant; or,
  • Required by the employer to wear respirators; or Permitted to wear respirators by the employer

Types of Respirators:

Particulate Respirators

  • Capture particles in the air, such as dusts, mists, and fumes.
  • Do not protect against gases or vapors.

Combination Respirators

  • Are normally used in atmospheres that contain hazards of both particulates and gases.
  • Have both particulate filters and gas/vapor filters.

Gas & Vapor Respirators

  • Are normally used when there are only hazardous gases and vapors in the air.
  • Use chemical filters (called cartridges or canisters) to remove dangerous gases or vapors.
  • Do not protect against airborne particles.air mask 3 no border
  • Are made to protect against specific gases or vapors.


◦Medical Evaluation/ Questionnaireair mask 2

◦Training on Hazards

◦Fit Testing to specific respirator

◦Cleaning and Maintenance

Voluntary Use:air mask 1

◦Only allowed when the contaminate has not reached an action level.

◦Typically worn for comfort of user.

◦Signed Waiver explaining hazards and cleaning protocols App. D



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