Respiratory Protection & Fit Testing: OSHA 1910.134 Explained
Quick answer: Whenever employees use respirators, OSHA's Respiratory Protection standard (29 CFR 1910.134) requires a written program with a hazard assessment, a medical evaluation before use, a fit test before use and at least annually, and annual training on proper use, limitations, and maintenance.
The steps to a compliant respiratory protection program (1910.134).
When a Program Is Required
A full written program is required whenever respirators are required by the employer or by a hazard, or when their use could create a hazard. Even purely voluntary respirator use carries some obligations (see below).
The Written Program
The program must be administered by a trained program administrator and cover respirator selection, medical evaluations, fit testing, use, maintenance, and training. Selection must be based on the hazard and the workplace exposure.
Medical Evaluation
Because wearing a respirator places stress on the body, each user must complete a medical evaluation (via a questionnaire or exam) before fit testing or use, and again if conditions or health status change.
Fit Testing
Tight-fitting respirators must be fit tested with the same make, model, and size the employee will wear — before first use, when the facepiece changes, and at least annually. Fit testing is either qualitative (pass/fail by taste or smell) or quantitative (instrument-measured). Users must also perform a seal check every time they don the respirator.
Annual Training
Training is required before use and at least annually, covering why the respirator is needed, its limitations, how to don/doff and seal-check it, and how to maintain it. Retrain sooner if understanding lapses or conditions change.
Voluntary Use
If employees voluntarily use respirators (including filtering facepieces/N95s) where not required, the employer must at minimum provide the information in Appendix D and ensure use doesn't create a hazard.
Frequently Asked Questions
How often is respirator fit testing required?
Before first use, whenever the make/model/size changes, and at least once every 12 months thereafter.
Does an N95 require a full program?
If the N95 is required, yes — medical evaluation, fit testing, and training all apply. Truly voluntary N95 use has lighter requirements (Appendix D).