Which factor is NOT listed as a determinant when choosing between an air-purifying respirator with cartridges and a supplied-air system?

Which factor is NOT listed as a determinant when choosing between an air-purifying respirator with cartridges and a supplied-air system?

• A. Cost of respirator
• B. Contaminant concentration relative to PEL/TLV
• C. Oxygen level
• D. Potential for IDLH

Answer: (A)

When deciding between an air-purifying respirator and a supplied-air system, the core decision hinges on safety factors in the work environment, not price. First, how the contaminant concentration stacks up against exposure limits (PEL/TLV) matters because an air-purifying respirator must have the right cartridge to reduce that contaminant to or below those limits. If the contaminant level is high or requires a cartridge that isn’t available, an air-purifying respirator may not be adequate. Second, the oxygen level is crucial. Air-purifying systems rely on ambient air, so if the workplace oxygen is deficient, they cannot provide safe protection, and a supplied-air system is required. Third, the potential for an IDLH environment is a red flag against using an air-purifying respirator. In such cases, only a supplied-air system (or self-contained breathing apparatus) meets the safety need. Cost of the respirator doesn’t determine whether the protective method is appropriate; it’s an economic consideration rather than a safety-determinant.

When deciding between an air-purifying respirator and a supplied-air system, the core decision hinges on safety factors in the work environment, not price. First, how the contaminant concentration stacks up against exposure limits (PEL/TLV) matters because an air-purifying respirator must have the right cartridge to reduce that contaminant to or below those limits. If the contaminant level is high or requires a cartridge that isn’t available, an air-purifying respirator may not be adequate.

Second, the oxygen level is crucial. Air-purifying systems rely on ambient air, so if the workplace oxygen is deficient, they cannot provide safe protection, and a supplied-air system is required.

Third, the potential for an IDLH environment is a red flag against using an air-purifying respirator. In such cases, only a supplied-air system (or self-contained breathing apparatus) meets the safety need.

Cost of the respirator doesn’t determine whether the protective method is appropriate; it’s an economic consideration rather than a safety-determinant.