Every N95 with a NIOSH approval filters at least 95 percent of 0.3 micron test particles. That is the whole promise of the letter and the number. It is also why buyers get into trouble: two respirators with identical filtration can differ in whether they are cleared for the operating room, whether they resist a fluid splash, and whether your staff can wear them without a new fit test.
Here is how the four 3M models that show up on most hospital and clinic orders compare, and how to build a stocking plan around them.
The models
3M 1860 and 1860S. The healthcare standard. A cup-style surgical N95, NIOSH-approved and FDA-cleared as a surgical mask. 3M's technical data sheet lists fluid resistance at 120 mm Hg, the ASTM F1862 Level 2 threshold. The S version is the small size. No exhalation valve, so it is appropriate in sterile fields.
3M 1804 and 1804S. A cup-style surgical N95 from the same healthcare family, offered in regular and small sizes. Like the 1860 it carries both the NIOSH approval and the FDA surgical mask clearance, which is what allows it into procedural areas. Facilities that fit-test staff on the 1804 typically keep it as a second model so a shortage of one does not shut down the other.
3M 1870+ (Aura). A flat-fold, three-panel surgical N95. It is also FDA-cleared and NIOSH-approved, and 3M positions it with a higher fluid resistance rating than the 1860. Its individual packaging and flat-fold design make it the common choice for kits, EMS bags, and staff who fit poorly in cup styles.
3M 8210 and 8210Plus. The industrial workhorse. NIOSH-approved N95 with the same filtration performance, but it is not FDA-cleared as a surgical mask and is not fluid resistant. 3M's own guidance is direct: the 8210 cannot be used in the operating room environment. It is the right respirator for facilities, maintenance, grounds, and dusty industrial tasks, and the wrong one for a procedure room.
What "surgical N95" actually adds
A surgical N95 is a respirator that has passed two separate bars: NIOSH approval for filtration and breathing resistance, and FDA clearance as a surgical mask, which requires fluid resistance and flammability testing. Standard N95s pass the first bar only. The filtration is the same. The splash protection and the regulatory permission to use it in a sterile procedure are not.
For most non-surgical patient care where a splash is not expected, a standard N95 is acceptable under OSHA and CDC guidance. For OR, L&D, trauma, endoscopy, and any aerosol-generating procedure with fluid exposure, specify surgical N95.
Fit testing is the constraint nobody budgets for
OSHA's respiratory protection standard (29 CFR 1910.134) requires a fit test for each make, model, style, and size an employee wears. 3M's comparison guidance is explicit that a worker switching from the 8210 to the 1860 has to be re-fit tested, even though the sizes are similar, because the construction differs.
That is why "we'll just buy whatever is available" fails during a shortage. The respirator you can buy is only useful if your staff are already fit-tested on it. The fix is to fit-test on two or three models in advance and to keep all of them on an approved list.
A stocking plan that survives an allocation
- Primary surgical N95: one cup style (1860 or 1804) in regular and small.
- Secondary surgical N95: one flat-fold (1870+) fit-tested on the staff who fail the cup style.
- Facilities N95: 8210 or 8210Plus, kept separate from clinical stock with a different bin label so it never migrates to a procedure room.
- A non-3M alternate: at least one NIOSH-approved surgical N95 from another manufacturer, fit-tested and on the formulary before you need it. Keystone stocks Makrite surgical N95s for exactly this reason.
- Par by department: four weeks of usage on hand for clinical models during respiratory season, two weeks the rest of the year.
How to read a quote
When you compare respirator quotes, line up five things: NIOSH approval number (TC-84A-xxxx), FDA clearance status, ASTM F1862 fluid resistance level, size availability, and case pack. A cheaper case that is not FDA-cleared is not a substitute for a surgical N95, and a case of the wrong size is a case you cannot issue.
Keystone stocks 3M surgical N95s and Makrite alternates in Edina, quotes by the case or the pallet, and can set a standing order so your respiratory-season par is filled without a purchase order every week.
See respirators and masks or request a quote with your fit-tested models.
Sources
- 3M, "Surgical N95 vs. Standard N95: Which to Consider?": https://multimedia.3m.com/mws/media/1839703O/surgical-n95-vs-standard-n95-which-to-consider.pdf
- 3M, Disposable Respirator 1860/1860S technical data sheet: https://multimedia.3m.com/mws/media/1538979O/3m-disposable-respirator-1860-1860s-technical-data-sheet.pdf
- OSHA, Respiratory Protection standard 29 CFR 1910.134: https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.134