CAN A RESPIRATORY FACE MASK
STOP THE CORONA VIRUS?
Based on this comparison, it is reasonable to consider China KN95, AS/NZ P2, Korea 1st Class, and Japan DS FFRs as “equivalent” to US NIOSH N95 and European FFP2 respirators, for filtering non-oil-based particles such as those resulting from wildfires, PM 2.5 air pollution, volcanic eruptions, or bioaerosols (e.g. viruses). However, prior to selecting a respirator, users should consult their local respiratory protection regulations and requirements or check with their local public health authorities for selection guidance.
|Certification/ Class (Standard)||N95 (NIOSH-42C FR84)||Korea 1st Class (KMOEL – 2017-64)||KN95 (GB2626-20 06)||FFP2 (EN 149-2001)|
|Filter performance – (must be ≥ X% efficient)||≥ 95%||≥ 94%||≥ 95%||≥ 94%|
|Test agent||NaCl||NaCl and paraffin oil||NaCl||NaCl and paraffin oil|
|Flow rate||85 L/min||95 L/min||85 L/min||95 L/min|
|Total inward leakage (TIL)* – tested on human subjects each performing exercises||N/A||≤ 8% leakage (arithmetic mean)||≤ 8% leakage (arithmetic mean)||≤ 8% leakage (arithmetic mean)|
|Inhalation resistance – max pressure drop||≤ 343 Pa||≤ 70 Pa (at 30 L/min) ≤ 240 Pa (at 95 L/min)||≤ 350 Pa||≤ 70 Pa (at 30 L/min) ≤ 240 Pa (at 95 L/min) ≤ 500 Pa (clogging)|
|Flow rate||85 L/min||Varied – see above||85 L/min||Varied – see above|
|Exhalation resistance – max pressure drop||≤ 245 Pa||≤ 300 Pa||≤ 250 Pa||≤ 300 Pa|
|Flow rate||85 L/min||160 L/min||85 L/min||160 L/min|
|Exhalation valve leakage requirement||Leak rate ≤ 30 mL/min||visual inspection after 300 L /min for 30 sec||Depressurizatio n to 0 Pa ≥ 20 sec||N/A|
|Force applied||-245 Pa||N/A||-1180 Pa||N/A|
|CO2 clearance requirement||N/A||≤ 1%||≤ 1%||≤1%|
WHAT IS A RESPIRATOR?
WHAT IS A KF94 RESPIRATOR?
WHEN DO I NEED A KN95 OR KF94 RESPIRATOR?
MY RESPIRATOR HAS AN EXHALATION VALVE, IS THAT OKAY?