What is Fit Testing?

Fit testing ensures that a respirator forms a proper seal against the user's face to provide effective protection. Without a good fit, even the best respirator may fail to keep out hazardous airborne particles or gases.

Types of Fit Testing

• Qualitative Fit Testing: Uses substances like saccharin or Bitrex to test if the wearer can taste or smell leakage.
• Quantitative Fit Testing: Uses machines to measure the actual amount of leakage into the respirator.
• Both methods must be performed by trained personnel following regulatory guidelines.

When is Fit Testing Required?

• Before initial use of a tight-fitting respirator.
• Annually as required by safety regulations.
• Whenever there is a change in face shape (e.g., weight change, dental work, facial surgery).
• When changing respirator models, brands, or sizes.

Important Reminders

• Fit testing is not the same as a user seal check done daily—both are essential.
• Be clean-shaven where the respirator makes contact with the face.
• Use the same PPE configuration (e.g., eyewear, headgear) as in actual work conditions.
• Document and retain fit test records as part of your health and safety program.