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3M Disposable respirator selection guide

09 Jan 2025

Step 1: Choose a Protection Factor

P1

P1 is the rating given to a respirator which meets AS/ NZS1716:2012 for filtering mechanically generated particles, e.g., particles formed by crushing, grinding, drilling, sanding and cutting.

P2

P2 is the rating given to a respirator that meets AS/NZS1716:2012 for filtering mechanically and thermally generated particles, e.g. welding fumes, bushfire smoke. Also for use against bio aerosols such as H1N1 and H5N1 Influenza.

Type GP1 / Type GP2

Type ‘G’ class rating is suitable for low vapour pressure (below 1.3Pa @ 25oC) organic compounds e.g. many agricultural chemicals like herbicides and pesticides.

N95

Reduces exposure to harmful airborne particles <100 micron eg. Bacillus anthracis, Mycobacterium tuberculosis, mould, SARS/Influenza virus.

Step 2: Choose a Valved or Unvalved Respirator

Valved Respirator Benefits

  • Reduces exhalation effort
  • Cooler to wear
  • Stays comfortable for longer
  • Less likely to mist up eyewear

Unvalved Respirator Benefits

  • Lower unit cost
  • Reduces potential for wearer contamination of their environment

Step 3: Choose a Style

You can choose from the following models to suit your environment and your face shape:

Step 4: Fit Test

A respirator cannot protect you if it does not fit your face

Best practice for any Personal Protective Equipment is to ensure the right fit.

  • Proper fitting of a respirator requires the application of an accepted method of fit testing.
  • It is recommended that wearers be fit tested in accordance with Standards Australia’s Guidance document AS/NZS 1715:2009.
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