When using air purifying respirators, which operational component must be considered prior to use?

• A. The appropriate cartridge or filter
• B. The color of the unit
• C. The brand name
• D. The strap material

Answer: (A)

With air-purifying respirators, protection depends on the filtering media chosen for the specific hazard you'll face. Before use, you must select the appropriate cartridge or filter that matches the contaminants you expect and their concentrations. This ensures the respirator actually removes the contaminants from the air you breathe. Verify that the cartridge or filter is the correct type (for organic vapors, acid gases, particulates, or a combination), is compatible with your respirator model, and is not expired. Install it correctly and perform a user seal check. The color of the unit, the brand, or the strap material do not determine protection; the critical factor is using the right cartridge or filter for the hazard and ensuring the respirator is functioning properly.