Table 3 Results from ICS Laboratories on instantaneous filtration efficiency according to NIOSH standard Procedure No. TEB-APR-STP-0059 (the flow rate was 85–86 LPM). Each row represents data from one to five N95 masks of a particular model and data are reported as the average for all tests that were performed. In contrast to the data in Table 2, each mask was measured only once and standard deviations are therefore reported only when the number of masks was greater than one.
Model | Cycles | Number of masks | Resistance (mm of H2O) | Penetration (%) | Filter efficiency (SD, %) |
|---|---|---|---|---|---|
3M 1860 | 1 | 4 | 10.35 | 0.67 | 99.33 (0.22) |
2 | 5 | 9.78 | 0.53 | 99.47 (0.24) | |
5 | 3 | 9.10 | 0.64 | 99.36 (0.37) | |
10 | 3 | 9.17 | 0.60 | 99.40 (0.10) | |
KC/Halyard 46767 (duckbill) | 1 | 1 | 15.20 | 0.11 | 99.89 |
2 | 1 | 14.10 | 0.22 | 99.78 | |
5 | 3 | 14.33 | 0.11 | 99.89 (0.01) | |
Gerson 2130 | 1 | 1 | 9.30 | 1.31 | 98.69 |
2 | 1 | 7.90 | 2.57 | 97.43 | |
5 | 1 | 9.80 | 1.35 | 98.65 | |
3M 8210 | 1 | 2 | 8.85 | 0.24 | 99.76 (0.04) |
2 | 2 | 8.95 | 0.18 | 99.82 (0.04) | |
5 | 3 | 9.40 | 0.28 | 99.72 (0.13) | |
10 | 3 | 7.77 | 0.37 | 99.63 (0.18) | |
3M 9210/37021 | 5 | 1 | 10.40 | 0.07 | 99.93 |
