Anyone required by their employer or by an OSHA standard to wear a respirator must complete respiratory protection training before first use and at least annually thereafter, under 29 CFR 1910.134(k). That includes workers in tight-fitting respirators (N95 filtering facepieces, elastomeric half-masks, full facepieces) and loose-fitting PAPRs. Employees who wear a filtering facepiece purely voluntarily, where no hazard requires it, must still receive the information in Appendix D of the standard — but they are exempt from fit testing and, for filtering facepieces only, from medical evaluation and a written program.
Mandatory use vs. voluntary use: the line that decides everything
The entire compliance burden hinges on one question: is the respirator required? A respirator is required when (a) engineering controls have not reduced exposure below the applicable permissible exposure limit, (b) a substance-specific standard mandates it, or (c) the employer requires it as a matter of policy. Once it's required, the full program under 1910.134 kicks in.
Mandatory use triggers the full program
- A written respiratory protection program with a named program administrator — 1910.134(c)(1)
- Medical evaluation before fit testing or use — 1910.134(e)
- Fit testing for all tight-fitting facepieces, before use and annually — 1910.134(f)
- Training on hazards, limitations, donning/doffing, seal checks, maintenance and emergency use — 1910.134(k)(1)
- Annual program evaluation and cartridge change schedules — 1910.134(l) and (d)(3)(iii)
Voluntary use triggers Appendix D
If an employee asks to wear an N95 for comfort or personal preference and no exposure assessment requires it, the employer must give them a copy of Appendix D ("Information for Employees Using Respirators When Not Required Under the Standard") and confirm the respirator doesn't create a hazard itself. For voluntary filtering facepiece use only, 1910.134(c)(2)(ii) exempts the employer from the written program and medical evaluation. Voluntary use of an elastomeric half-mask or any cartridge respirator is different: medical evaluation and basic program elements still apply.
Respirator type determines the duties
| Respirator type | Medical evaluation | Fit test | Seal check each use | Typical assigned protection factor |
|---|---|---|---|---|
| N95 filtering facepiece (required use) | Yes | Yes — annually | Yes | 10 |
| N95 filtering facepiece (voluntary use) | Not required | Not required | Recommended | 10 |
| Elastomeric half-mask with cartridges | Yes (even voluntary) | Yes — annually | Yes | 10 |
| Full facepiece air-purifying | Yes | Yes — annually | Yes | 50 |
| Loose-fitting PAPR (hood/helmet) | Yes | No fit test required | No — airflow check instead | 25 |
| Tight-fitting PAPR | Yes | Yes — annually | Yes | 50 (half-mask 50, full 1,000) |
| SCBA (pressure demand) | Yes | Yes — annually | Yes | 10,000 |
Note the practical consequence: a worker who cannot pass a fit test because of facial hair or facial structure can often be moved to a loose-fitting PAPR, which requires no fit test. That's a common accommodation in healthcare and in construction trades.
The medical evaluation: what it actually involves
Before any employee is fit tested or wears a required respirator, a physician or other licensed health care professional (PLHCP) must determine they are medically able to wear it. The default method is the mandatory questionnaire in Appendix C of 1910.134, Part A, Sections 1 and 2. Key points:
- Questions 1–9 of Section 1 apply to all respirator users; Section 2 adds questions for anyone using a full facepiece or SCBA.
- The employee must complete it during work hours, at no cost, confidentially — the employer does not see the answers, only the PLHCP's written recommendation.
- The employer receives a written determination: cleared, cleared with restrictions, or not cleared — plus whether follow-up is needed.
- A follow-up medical exam is required if the employee answers "yes" to any question in Part A Sections 1 (Q1–8) or 2, or if the PLHCP requests it.
- Re-evaluation is required when symptoms appear, when the PLHCP or supervisor recommends it, when fit test results indicate a problem, or when workplace conditions change materially — there is no automatic annual requirement.
An online course cannot perform your medical evaluation or your fit test. Those must be done by a PLHCP and a trained fit-test administrator, respectively, in person. Online training covers the knowledge requirement in 1910.134(k) — the hazard, the limitations, the procedures — and is a genuine, documentable part of the program, but it is not the whole program.
Fit testing thresholds
Qualitative fit testing (QLFT) using Bitrex, saccharin, isoamyl acetate or irritant smoke is acceptable only for respirators with an assigned protection factor of 10 or less — in practice, half-masks and N95s. Quantitative fit testing (QNFT) is required for anything relying on a higher APF. The pass thresholds: a fit factor of at least 100 for half-mask respirators and at least 500 for full facepiece respirators. Fit testing is repeated annually, and also whenever the make, model, style or size changes, or when the employee has a physical change — significant weight change, dental work, facial scarring — that could affect the seal.
Industry-specific triggers
Construction: respirable crystalline silica, 29 CFR 1926.1153
Table 1 of the silica standard specifies respirator requirements by task and duration. Handheld power saws cutting masonry for more than four hours per shift outdoors, for example, require an APF 10 respirator even with water-fed dust control. Where the employer doesn't follow Table 1, exposures must be assessed against the PEL of 50 µg/m³ as an 8-hour TWA, with an action level of 25 µg/m³. Any respirator use under this standard is mandatory use.
Asbestos (1910.1001 / 1926.1101) and lead (1910.1025 / 1926.62)
Asbestos requires respirators whenever exposures exceed the PEL of 0.1 f/cc as an 8-hour TWA or the excursion limit of 1.0 f/cc over 30 minutes, and for all Class I work above specified levels. Lead triggers respirator use above the PEL of 50 µg/m³, with an action level of 30 µg/m³ and blood-lead monitoring obligations. Both standards also require respirator selection consistent with 1910.134.
Healthcare: tuberculosis and aerosol-transmissible disease
OSHA enforces respiratory protection for TB through 1910.134 itself: staff entering airborne infection isolation rooms, performing aerosol-generating procedures, or transporting suspected TB patients need at minimum a fit-tested N95. California's Cal/OSHA ATD standard (title 8, §5199) goes further for covered facilities, adding PAPR requirements for high-hazard procedures. Clinical staff typically pair this with bloodborne pathogens training, since exposure control plans cover both routes.
General industry and emergency response
Welders, painters using isocyanate coatings, agricultural pesticide applicators, foundry workers and firefighters all commonly fall under mandatory use. Where respirators are worn alongside other PPE and chemical hazards, pair the training with Hazard Communication (GHS) so employees can read the SDS section that drives respirator selection in the first place.
Retraining timelines
- Initial training: before the employee is required to use a respirator — 1910.134(k)(1)
- Annual retraining: at least every 12 months — 1910.134(k)(5)
- Additional retraining: when workplace conditions change, a new respirator type is introduced, or the employee demonstrates gaps in knowledge or skill — 1910.134(k)(5)(i)–(iii)
- Program evaluation: employer must evaluate program effectiveness "as necessary," including consulting employees — 1910.134(l)
Our Respiratory Protection course covers the knowledge elements OSHA requires at initial and annual intervals, and issues a dated certificate you can file in the employee's training record.
Frequently asked questions
Does a beard disqualify me from respirator use?
From tight-fitting respirators, yes. 1910.134(g)(1)(i)(A) prohibits any facial hair that comes between the sealing surface and the face. A loose-fitting PAPR hood is the standard accommodation and requires no fit test.
Is my fit test still valid if I switch brands of N95?
No. Fit testing is specific to the make, model, style and size. A new model requires a new fit test before use, even if the old one is less than a year old.
Do surgical masks count as respirators?
No. Surgical and procedure masks are not NIOSH-approved respirators, provide no assigned protection factor, and trigger no 1910.134 obligations. Only NIOSH-approved devices qualify.
Can one annual session cover both training and fit testing?
Yes, and many employers schedule them together — but they are separate requirements. Completing online training does not satisfy fit testing, and passing a fit test does not satisfy the training requirement under 1910.134(k).
If your annual respirator training is due, you can complete it today. Enroll in Respiratory Protection at FastCredentials and download your certificate as soon as you finish — then schedule your fit test and medical clearance to close out the rest of your program.