Mask Fit Testing

Fit testing involves the proper selection and fit of a mask, while considering activities performed when wearing a mask. The CSA, OSHA, NIOSH have either 7 or 8 movements designed to evaluate whether or not the mask fits properly.


A Respirator Mask Fit Test is performed to make sure the respirator is properly fitted to an individual’s face type to provide the safest protection. Typically, there are 2 types of tests that are done, known as a Qualitative test or a Quantitative test.

There are two Fit Testing methods, these are known as: Quantitative and Qualitative tests.

  • Quantitative tests – can be used to fit test all types of tight-fitting masks including disposable, half and full-face masks. Quantitative tests give an objective assessment of facial fit and provide a direct numerical result called a Fit Factor.
  • Qualitative tests – rely on the wearer’s subjective assessment of face seal leakage. These methods, during a set of test exercises, use the wearer’s sense of smell or taste to detect face seal leakage of a test agent.

Following the Canadian Standards Association CSA Z94.4-02 Selection, Care and Use of Respirators, our program provides a theoretical and practical component for respiratory protection.

Before you can be tested for Respirator Mask Fit Testing:

  • You must not smoke, eat, chew gum, drink any liquids (except water) at least 20 minutes prior to the test, to ensure an accurate, successful respirator mask fit test (All types of masks).
  • You must be clean shaven for the Respirator Protection Training testing procedure
  • As per Ontario Ministry of Labor rules, you must be re-certified for respirator mask fit testing every 24 months.

What You'll Learn

STS group fit test program not only fits masks, but provides specific training on the use, criteria for use, donning and removal of the mask, as well as other essential information related to mask use.

Who Should Attend?

Healthcare Professionals and Practitioners, Students in Healthcare Programs, Workers who work in Construction and Industrial workplaces, Laboratory Personnel.

Service Objectives

  • Provide a printed copy of the workers report to the employer.
  • Provide options to workers in the event that a mask does not offer a minimum fit factor and reassess the worker for a different mask.
  • Offer solutions to control exposures in areas identified as containing air quality and above acceptable levels as per legislative standards.
  • Objectively evaluate the fit of masks.


  • OSHA 29 CFR 1910.134
  • CDC Tuberculosis Guideline
  • Joint Commission (LD.1.30)
  • OSHA/CDC/WHO Pandemic/Terrorism Preparedness Guidelines
  • ANSI Z88.10, CSA Z94.4 (Canada)


Upon successful completion of the evaluation participants will receive wallet card and record of training.

We Are Fully Certified


STS Group is a Full Service Workplace Health and Safety Training & Consulting Company, providing occupational health and safety training and consulting services for various industries at affordable prices since 1992.


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STS Health and Safety Training & Consultants Inc.

2833 16th Avenue
Buttonville Municipal Airport
Main Terminal Offices
(Million Air Entrance)
Markham, ON L3R 0P8

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