Table 2 Filtering facepiece, air-purifying respirator(APR) and powered air-purifying respirator (PAPR) classification according to NIOSH/EN (National Institute for Occupational Safety and Health (NIOSH) and European Norms (EN) with stated assigned protection factor (APF)
Respirator type | NIOSH nomenclature | EN nomenclature | Minimum filtration capacity for particles > 0.3 microns | OSHA APF | EN Standard APF |
|---|---|---|---|---|---|
Face filtering respirator | FFP1 | 80% | 4 fold | ||
FFP2 | 94% | 10 fold | |||
N95 | 95% | 10 fold | |||
N99 | FFP3 | 99% | 10 fold | 20 fold | |
P100 | 99.97% | 10 fold | 20 fold | ||
Air-purifying respirator (APR) | APR half facepiece | APR half facepiece | As per selected filter | 10 | 10 |
Air-purifying respirator (APR) | APR full facepiece | APR full facepiece | As per selected filter; | 10–50 | 10–50 |
Powered air-purifying respirator (PAPR) | PAPR half facepiece | PAPR half facepiece | 99.97% | 50 | 50 |
PAPR full facepiece | PAPR full facepiece | 99.97% | 1000 | 1000 | |
PAPR helmet/hood | PAPR helmet/hood | 99.97% | 25–1000 | 25–1000 | |
Loose-fitting facepiece | Loose-fitting facepiece | 99.97% | 25 | 25 |