Respirators for Asbestos

The exposure limits

What the federal rule says

Each entry is condensed from the paragraph cited; the paragraph itself is the rule and the link opens it.

29 CFR 1910.1001(g)(3): Employers must select, and provide to employees, the appropriate respirators specified in paragraph (d)(3)(i)(A) of 29 CFR 1910.134; however, employers must not select or use filtering facepiece respirators for protection against asbestos fibers. Provide HEPA filters for powered and non-powered air-purifying respirators.

29 CFR 1910.1001(g)(2)(ii): Employers must provide an employee with a tight-fitting, powered air-purifying respirator (PAPR) instead of a negative pressure respirator selected according to paragraph (g)(3) of this standard when the employee chooses to use a PAPR and it provides adequate protection to the employee.

29 CFR 1926.1101(h)(1) (construction): Respirators must be used during Class I asbestos work; Class II asbestos work when ACM is not removed in a substantially intact state; Class II and III asbestos work that is not performed using wet methods; Class II and III work for which a negative-exposure assessment has not been conducted; Class III work when TSI or surfacing ACM or PACM is being disturbed; Class IV work within regulated areas where other employees are required to use respirators; work operations for which employees are exposed above the TWA or excursion limit; and emergencies.

Source: 29 CFR, Occupational Safety and Health Standards, as published by OSHA (ecfr.gov / osha.gov), read Nov 2–3 2026.

California (Cal/OSHA)

Each entry is condensed from the paragraph cited; the paragraph itself is the rule and the link opens it.

Title 8 §5208 and §1529: California's asbestos standards carry the same PEL (0.1 f/cc TWA, 1.0 f/cc excursion) and refer respirator selection to Section 5144.

Source: California Code of Regulations, Title 8, as published by Cal/OSHA (dir.ca.gov), read Nov 2–3 2026.

What the makers' data lists for asbestos fibers

Filtering facepiece (disposable) respirators are not permitted for asbestos under 29 CFR 1910.1001(g)(3)(i); the pages below list elastomeric and powered respirators with P100 (HEPA) filters only.

North cartridges and filters whose chart entry covers it

Source: North Cartridge & Filter Reference Chart; NIOSH approval labels (PIP).

North facepieces

Source: North product sheets (PIP).

Dräger filters listed for it

Source: Dräger Guide for Selection and Use of Respiratory Filtering Devices, NIOSH (DMC-104642); Dräger X-plore Bayonet Filters NIOSH product information (DMC-109824); Dräger X-plore 8000 product information (DMC-102510).

Dräger masks

Source: Dräger Product Catalog, Industrial Applications (DMC-107423).

Dräger X-plore 8000 PAPR blowers

Source: Dräger X-plore 8000 product information (DMC-102510).

Dräger selection guide entries

4 entries in the Dräger respiratory selection guide match asbestos fibers; each names the filters by part number.

Source: Dräger Respiratory Protection Selection Guide (PIP document library).

Assigned protection factor

Source: OSHA 29 CFR 1910.134 Table 1 (Assigned Protection Factors). The APF applies only when the respirator is used in a program that meets the standard, including fit testing of tight-fitting facepieces (29 CFR 1910.134(f)) and a cartridge change schedule (29 CFR 1910.134(d)(3)(iii)).

Guides: half mask vs full facepiece · assigned protection factors · cartridge change schedules · P100 vs N95 vs R95 · what OSHA requires for fit testing · cleaning and storing respirators.

Respirators for Asbestos questions

Is an N95 mask enough for asbestos? No. 29 CFR 1910.1001(g)(3)(i) states employers must not select or use filtering facepiece respirators for protection against asbestos fibers, and HEPA filters are required on air-purifying respirators.

What is the asbestos PEL? 0.1 fiber per cubic centimeter as an 8-hour TWA and 1.0 f/cc as a 30-minute excursion limit (29 CFR 1910.1001(c); Cal/OSHA §5208(c)).