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 exercises： ≤ 8% leakage (arithmetic mean)

Inhalation resistance – max pressure drop： ≤ 350 Pa

Exhalation resistance -max pressure drop: ≤ 250 Pa

Flow rate: 85 L/min

Exhalation valve leakage requirement: Depressurization n to 0 Pa ≥ 20 sec

Force applied: -1180 Pa

CO2 clearance requirement: ≤ 1%