What happens during a face fit test?

Ensuring that tight-fitting respiratory protective equipment (RPE) fits correctly is crucial for safeguarding workers from harmful airborne contaminants. A quantitative face fit test is the gold standard for assessing the fit of tight-fitting masks. It provides precise, objective measurements to confirm whether the RPE offers the required level of protection. In this blog, we walk you through what happens during a quantitative face fit test and why it’s essential for workplace safety and compliance.

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Step-by-Step Process of a Quantitative Face Fit Test

1. Pre-Test Preparation

Before the test begins, the individual being tested is briefed on the procedure and its purpose. They are also asked to:

• Avoid eating, drinking (except water), or smoking for at least 30 minutes before the test.
• Bring their usual RPE or be provided with a suitable model (Sundstrom half face mask available to purchase at AEC).
• Remove facial hair that could interfere with the mask’s seal, as this can compromise the results.

The tester will inspect the mask to ensure it’s in a good condition and fits the individual’s face type.

2. Wearing the Mask

You will be guided to properly don the mask according to the manufacturer’s instructions. The straps are adjusted to achieve a secure fit without over-tightening. Correct placement of the mask is essential for an accurate test.

3. Connecting the Equipment

A small sampling tube is attached to the mask and connected to a particle-counting device, such as the PortaCount® Fit Tester. This device measures the concentration of particles inside and outside the mask to determine its fit factor.

4. Performing Test Exercises

The individual is asked to perform a series of movements and exercises designed to mimic typical workplace activities. These include:

• Normal breathing.
• Deep breathing.
• Turning the head from side to side.
• Nodding the head up and down.
• Talking loudly or reading a passage.
• Bending over or simulating other physical tasks.

Each exercise lasts about one minute and ensures that the mask maintains its seal during various activities.

5. Measuring Fit Factor

Throughout the test, the PortaCount® device continuously measures the particle concentration inside the mask compared to the ambient air. This data is used to calculate the fit factor—a numerical score indicating the mask’s effectiveness. A higher fit factor indicates a better seal and higher protection.

6. Interpreting Results

At the end of the test, the results are displayed and evaluated. A pass or fail outcome is determined based on the fit factor achieved and the minimum requirement for the specific type of mask. If the mask fails, adjustments may be made, or an alternative mask may be tested.

7. Documenting the Test

Our tester provides a detailed report documenting the results, which can be used to demonstrate compliance with regulatory standards such as those outlined by the Health and Safety Executive (HSE). This record is an essential part of an employer’s RPE programme.

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Why Quantitative Testing is Essential

Quantitative face fit testing offers several advantages over qualitative methods, including:

• Objective Data: Accurate, numerical results that eliminate reliance on subjective perception.
• Broad Compatibility: Suitable for all types of tight-fitting RPE, including full-face and half-face respirators.
• Enhanced Safety: Ensures the mask provides the intended level of protection in real-world scenarios.

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Trust Airborne Environmental Consultants (AEC) for Your RPE Testing Needs

At Airborne Environmental Consultants (AEC), we are committed to helping you protect your workforce. Our experienced team uses state-of-the-art equipment to conduct thorough quantitative face fit tests, ensuring your RPE programme meets the highest safety and compliance standards.

AEC offers next day face-fit tests from £35* Go to our booking page for more information.