Table 1.
Infectious-particle-size-weighted filtration efficiency for a range of HVAC air filters [54]
| Filter Type | Range | Mean |
|---|---|---|
| MERV 4 | 7.7–12.7% | 10.5% |
| MERV 7 | 35.5–47.4% | 42.2% |
| MERV 13 | 81.6–89.2% | 85.9% |
| MERV16 | 95.0% | 95.0% |
| HEPA | 99.9% | 99.9% |
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