Respirator refers to a protective device worn over the mouth and nose (or covering the entire face) to reduce a wearer’s inhalation of harmful airborne substances. It is a specialized type of mask designed to filter or supply air so the user is less likely to breathe in hazardous particles, dusts, fumes, or gases.
Common types
- Filtering facepiece respirators: lightweight, disposable units that filter particulates from the air passing through the material.
- Elastomeric respirators: reusable devices with replaceable filter cartridges or canisters for particulates, gases, or both.
- Powered air-purifying respirators (PAPR): battery-powered units that draw air through filters and deliver it to a hood or facepiece, reducing breathing resistance.
- Supplied-air and self-contained breathing apparatus: systems that provide air from a clean source; used where the atmosphere is oxygen-deficient or heavily contaminated.
Where and why they are used
Respirators are employed across many fields to protect workers and responders from respiratory hazards. They are common in healthcare, construction, chemical processing, mining, and military settings, as well as among other industrial occupations. The appropriate type depends on the contaminant, its concentration, and the work environment.
Limitations and safe use
Proper selection, fit, and maintenance are essential for a respirator to offer protection. Some respirators only protect against particles and will not stop hazardous gases or vapors unless fitted with the correct cartridges. Many cannot be used safely in atmospheres with low oxygen or where concentrations of contaminants are immediately dangerous to life or health without specialized supplied air.
Users should follow manufacturer instructions for fit testing, cleaning, filter replacement, and storage. Training and a respiratory protection program are recommended wherever respirators are used regularly to ensure effective protection.