Table 3.
Summary data of filter aerosol penetration and filter airflow resistance for FFRs following various decontamination treatmentsa
FFR model | Treatment | Average initial sodium chloride penetration (%P) | Standard deviation of penetration | Average initial resistance (mmH2O) | Standard deviation of resistance |
N95 FFRs | |||||
N95-A | As-received | 0.121 | 0.08 | 7.6 | 0.83 |
UVGI | 0.072 | 0.04 | 7.6 | 0.29 | |
EtO | 0.101 | 0.06 | 7.3 | 0.10 | |
VHP | 0.071 | 0.04 | 7.8 | 0.21 | |
Microwave | 0.105 | 0.07 | 7.9 | 0.06 | |
Bleach | 0.262 | 0.18 | 8.1 | 0.47 | |
N95-B | As-received | 1.00 | 0.64 | 9.4 | 0.68 |
UVGI | 0.76 | 0.43 | 10.3 | 0.12 | |
EtO | 0.667 | 0.39 | 9.7 | 0.10 | |
VHP | 0.659 | 0.34 | 9.6 | 0.50 | |
Microwave | 1.06 | 0.74 | 9.0 | 0.40 | |
Bleach | 0.629 | 0.34 | 9.8 | 0.30 | |
N95-C | As-received | 1.48 | 0.94 | 6.9 | 1.61 |
UVGI | 1.77 | 0.96 | 7.1 | 1.68 | |
EtO | 1.82 | 1.12 | 6.9 | 1.47 | |
VHP | 1.47 | 0.91 | 6.5 | 2.37 | |
Microwave | 1.46 | 0.82 | 6.2 | 0.61 | |
Bleach | 1.13 | 0.79 | 8.0 | 3.06 | |
Surgical N95 respirators | |||||
SN95-D | As-received | 1.57 | 0.83 | 8.4 | 0.50 |
UVGI | 1.86 | 0.97 | 9.2 | 0.44 | |
EtO | 0.90 | 0.49 | 8.1 | 0.32 | |
VHP | 0.71 | 0.50 | 8.6 | 1.04 | |
Microwave | 0.711 | 0.44 | 8.7 | 0.64 | |
Bleach | 0.561 | 0.38 | 9.6 | 0.29 | |
SN95-E | As-received | 0.335 | 0.19 | 6.1 | 0.15 |
UVGI | 0.371 | 0.21 | 7.1 | 0.61 | |
EtO | 0.498 | 0.32 | 6.7 | 0.40 | |
VHP | 0.542 | 0.32 | 7.1 | 1.28 | |
Microwave | Melted | Melted | Melted | Melted | |
Bleach | 0.233 | 0.12 | 6.6 | 0.56 | |
SN95-F | As-received | 0.716 | 0.37 | 6.7 | 0.17 |
UVGI | 0.720 | 0.37 | 6.6 | 0.26 | |
EtO | 0.687 | 0.35 | 6.3 | 0.25 | |
VHP | 0.727 | 0.37 | 6.5 | 0.29 | |
Microwave | 0.652 | 0.33 | 5.4 | 0.72 | |
Bleach | 0.692 | 0.35 | 5.9 | 0.46 | |
P100 FFRs | |||||
P100-G | As-received | 0.009 | 0.01 | 13.1 | 0.79 |
UVGI | 0.005 | 0.00 | 13.1 | 1.21 | |
EtO | 0.003 | 0.00 | 12.8 | 0.57 | |
VHP | 0.006 | 0.01 | 13.4 | 1.23 | |
Microwave | 0.002 | 0.00 | 13.1 | 0.62 | |
Bleach | 0.006 | 0.00 | 13.6 | 0.92 | |
P100-H | As-received | 0.007 | 0.01 | 15.8 | 0.87 |
UVGI | 0.007 | 0.01 | 16.0 | 1.82 | |
EtO | 0.003 | 0.00 | 15.2 | 0.64 | |
VHP | 0.010 | 0.01 | 15.0 | 1.27 | |
Microwave | 0.000 | 0.00 | 15.8 | 0.30 | |
Bleach | 0.010 | 0.01 | 15.1 | 0.81 | |
P100-I | As-received | 0.008 | 0.00 | 16.4 | 0.85 |
UVGI | 0.012 | 0.01 | 16.5 | 0.10 | |
EtO | 0.006 | 0.00 | 15.9 | 0.76 | |
VHP | 0.007 | 0.00 | 16.2 | 0.93 | |
Microwave | Melted | Melted | Melted | Melted | |
Bleach | 0.004 | 0.00 | 17.0 | 0.98 |
Filter aerosol penetration and filter airflow resistance testing performed using a TSI 8130 AFT (n = 3).