Table 3 Summary of tested filtration performance data.
| Â | Unit | No. 4 | No. 5 | No. 6 |
|---|---|---|---|---|
Measurement duration | s | 1180 ± 6 | 1016 ± 6 | 861 ± 6 |
Dust hold capacity | g/m2 | 132 ± 3 | 108 ± 1 | 98 ± 1 |
Overall efficiency | % | 99.57 ± 0.02 | 99.66 ± 0.01 | 99.59 ± 0.02 |
