When using a half-mask respirator, how should the user check for leaks?

To ensure an effective seal when using a half-mask respirator, it's important to perform a leak check to confirm that no air is bypassing the mask's filters. Covering the filter cartridges with your hands is an effective strategy because this action can help determine if air is escaping through any gaps between the respirator and your face. If the user can feel air escaping, this indicates that the mask isn’t fitted properly and adjustments are necessary.

This method directly tests the integrity of the seal around the face and the filtering elements, providing immediate feedback on whether or not the respirator is functioning as intended. It is a practical and reliable approach, especially in situations where proper fit is critical for safety.

Other methods may not offer the same level of assurance regarding leaks. For instance, looking in a mirror may help assess the positioning of the mask, but it does not guarantee that air isn’t leaking around the edges. Adjusting the straps can improve fit but does not directly test for air leaks. Testing the fit by speaking can give some feedback on the seal but is not as conclusive as covering the cartridges. Thus, the most reliable way to check for leaks effectively is by using the method of covering the filter cartridges.