When is a fit test for respirators required?

A fit test for respirators is required initially and then at least once a year thereafter to ensure that the respirator provides an adequate seal and thus maximum protection for the wearer. This testing process helps identify the correct type of respirator and ensures that it fits the individual properly, as facial features can vary significantly from person to person.

Conducting the fit test annually is crucial because changes in the employee's physical condition, such as weight fluctuations or facial hair growth, may affect the fit of the respirator. Additionally, as respiratory protection standards evolve, periodic testing ensures compliance with current safety regulations and best practices.

The other options, such as testing every 6 months, every time a new respirator is issued, or only upon employee request, do not align with general regulatory requirements and best practices. The specified annual requirement allows for effective monitoring of the respirator's fit while minimizing unnecessary frequency of testing.