Respiratory Protection & Respirator Selection

Respiratory hazards are invisible and painless. Silica dust, asbestos fibers, paint vapors, and welding fumes cause no immediate discomfort — but years of exposure lead to irreversible lung disease. By the time a worker develops symptoms of silicosis or occupational asthma, permanent damage has already occurred. Respiratory protection is one of the few cases where the protection you need is entirely invisible on the day it matters most.

1. Respiratory protection is the last line of defense. Engineering controls (ventilation, enclosure, water suppression) must be evaluated first.
2. N95 respirators filter 95% of airborne particles but provide NO protection against vapors, gases, or oxygen-deficient atmospheres.
3. Half-face and full-face air-purifying respirators require cartridges matched to the specific hazard: P100 for particles, OV for organic vapors, acid gas cartridges for specific chemicals.
4. A written Respiratory Protection Program is required by OSHA before any employee uses a respirator, including voluntary N95 use.
5. Fit testing is required annually for tight-fitting respirators. A beard where the mask contacts your face prevents a proper seal and voids the protection.
6. Medical clearance from a physician is required before wearing respiratory protection. Some conditions make respirator use dangerous.
7. In oxygen-deficient atmospheres (<19.5%) or IDLH conditions, only self-contained breathing apparatus (SCBA) is acceptable. Air-purifying respirators will not protect you.