How often should the fitting of a respirator be checked?

The fitting of a respirator should be checked every time before use to ensure that it provides an adequate seal and protection against airborne contaminants. This regular check helps confirm that the respirator fits properly, as factors such as facial hair, changes in weight, or the condition of the respirator can affect its fit. Ensuring a proper fit is crucial for the respirator to function effectively, as even a small gap can allow harmful substances to enter the breathing space.

While other intervals for fitting checks might seem reasonable, they do not account for daily variations in fit or conditions. A weekly or monthly check may not be sufficient if the conditions or user's physical state change frequently, potentially compromising safety. Fitting checks only when discomfort is felt also could lead to inadequate protection during critical times when the respirator is needed, as discomfort might not manifest until after exposure has begun. Therefore, performing a fit check every time before use ensures ongoing safety and effectiveness of respiratory protection.