Disposable Respirators Usage Guide
Disposable Respirators Usage Guide
Choosing particulate filters
Select respiratory protection for the hazards and exposure levels identified in your workplace assessment. Particulate filters do not protect against gases or vapours. Follow the specific product’s User Instructions and use limitations.
Filter efficiency is one part of selection. Fit, training, compatibility with other PPE and the required level of protection also matter.
Particulate filter ratings
Respirator Rating Number Class 95
At least 95% filtration efficiency under the applicable NIOSH certification test conditions. This rating does not describe protection against gases or vapours.
Respirator Rating Number Class 99
At least 99% filtration efficiency under the applicable NIOSH certification test conditions. This rating does not describe protection against gases or vapours.
Respirator Rating Number Class 100
At least 99.97% filtration efficiency under the applicable NIOSH certification test conditions. This rating does not describe protection against gases or vapours.
Respirator Rating Letter Class
N: not resistant to oil.
R: resistant to oil.
P: oil proof.
Oil resistance does not mean unlimited service life. Follow the manufacturer’s time-use and replacement limits.