What Size Particles do Fitseal™ Respirators filter out?
Airborne particles that are considered respiratory hazards range in sizes between 0.01 -100 micrometers (µm). The Fitseal™ respirator have been tested and proven to filter out such particles at greater than 99.5% efficiency. The established standard for filtration (penetration) is based on testing with particles of 0.3 microns mass median aerodynamic diameter as per criteria in 42CFR Part 84. The particle diameter of 0.3 µm is used because it is the size most likely to penetrate the filter medium. Particles of both smaller and larger diameters will be trapped with even greater efficiency due to the respective electrostatic and mechanical properties of the filter. FFPR’s certified by NIOSH can be used for all particulate respiratory hazards irrespective of size.
