What do particulate filters do in nonpowered air-purifying respirators?

Particulate filters in nonpowered air-purifying respirators are specifically designed to remove aerosols from the air. These aerosols can comprise dust, pollen, smoke, and other fine particles that can be hazardous when inhaled. The filtration process involves trapping these particles as air passes through the filter material, thereby providing clean air to the user. The effectiveness of particulate filters is crucial for protecting respiratory health, especially in environments where airborne contaminants are prevalent.

Filters do not enhance airflow, increase comfort, or release chemicals. While it's important for a respirator to be comfortable for prolonged use, the primary function of particulate filters is strictly to purify the air by capturing harmful particulate matter.