Face Fit Testing

Quantitative face fit testing (QNFT) ensures the effectiveness of a tight fitting face mask via a numerical measure.  It measures the amount of particles that enter the breathing zone and therefore how well the face mask is sealing against your face.  This is in contrast to qualitative face fit testing that is more subjective and relies on a wearer’s taste response when using a strong-tasting agent sprayed near the breathing zone.

Face Fit Testing is a legal requirement. Whilst surveying, you will require a respirator, which for a close-fitting RPE will need to be face fit tested professionally for you. You will need to have this re-tested regularly (and if you have changes to your face that could affect the fitting of your mask).

• You must have no facial hair (clean shaven) where the respirator forms a seal with your face. This must be the case every time you utilise your respirator thereafter.
• You  must refrain from smoking (including e-cigarettes) for at least 1 hour prior to your test
• You must confirm if you typically wear other PPE that may interfere with the respirator (if so, they will need to be worn during the test)
• You must confirm to the face-fit tester that you have received training in wearing your respirator. Let them know if you have not received any training

The Face-Fit tester will take you through the basics of how to put on the face-piece, position it on your face and set the strap tension to determine an acceptable fit.  You will need to put  respirator when requested – there is a mirror to assist you.  You will then need to put on your respirator correctly, without assistance. Once the respirator is on and prior to the QNFT (Quantitative Face Fit Test) starting, you will need to carry out a vacuum seal check.

The test works by measuring ambient particles both outside and inside your respirator simultaneously