The KN95 is an industry standard for respiratory equipment which has the intended effectiveness of filtering 95% of particulate grater than .3 microns.
KN95 masks are considered respiratory protective equipment.
| Certification/ Class (Standard) |
KN95 |
| Filter performance – (must be ≥ X% efficient) |
≥ 95% |
| Test agent |
NaCl |
| Flow rate |
85 L/min |
| Total inward leakage (TIL)* – tested on human subjects each performing |
≤ 8% leakage (arithmetic mean) |
| Inhalation resistance – max pressure drop |
≤ 350 Pa |
| Flow rate |
85 L/min |
| Exhalation resistance - max pressure drop |
≤ 250 Pa |
| Flow rate |
85 L/min |
| Exhalation valve leakage requirement |
Depressurization to 0 Pa ≥ 20 sec |
| Force applied |
-1180 Pa |
| CO2 clearance requirement |
≤ 1% |
