Non-Powered Air-Purifying Respirator (APR)
When using a non-powered air-purifying respirator, the user operates it simply by breathing.
Non-Atmosphere-Supplying Respirators
There are basically three types of non-powered APRs:
- Half mask/Dust mask
- Half mask (Elastomeric)
- Full face piece (Elastomeric)
APRs provide the following key features, advantages, and disadvantages:
Key Features
- elastic face piece covers entire face
- inspiratory effort of wearer draws ambient air through filter(s) before air is inhaled
- provides increased protection when used with filters, cartridges, or canisters that remove specific contaminants
Advantages
- Comparatively light weight.
- Does not restrict mobility.
- Provides both respiratory and eye protection.
Disadvantages
- Does not supply oxygen (cannot be used in low oxygen environments).
- May only be used when air contaminant level is below the concentration limits of the filter(s).
- Fit testing required.
- Some contaminated air can leak into facepiece.
- Communication can be difficult.
Knowledge Check Choose the best answer for the question.
2-3. What is a major disadvantage of non-powered air-purifying respirators (APRs)?
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