Table 3.
Annual mean exposure to PM2.5 indoors and health benefits due to air filter use at different scenarios from CONTAM program.
| Annual Mean PM2.5 Exposure (μg/m3) | Mortality (% of Avoidable †) Averted per Million People | ||||
|---|---|---|---|---|---|
| Smoker Absent | Smoker Present | Smoker Absent | Smoker Present | ||
| 8-hour Air Filter use | No Air Filter | 103 | 137 | NA | NA |
| Low efficiency filter | 71 | 84 | 61 (8.3) | 75 (10.2) | |
| Mid efficiency filter | 65 | 77 | 77 (10.3) | 90 (12.1) | |
| HEPA filter | 62 | 78 | 85 (11.5) | 88 (11.9) | |
| 15-hour Air filter use | Low efficiency filter | 56 | 60 | 104 (14) | 134 (18.1) |
| Mid efficiency filter | 44 | 46 | 150 (20.2) | 184 (24.8) | |
| HEPA filter | 39 | 40 | 174 (23.5) | 212 (28.6) | |
| All day air filter use | Low efficiency filter | 50 | 56 | 125 (16.9) | 146 (19.8) |
| Mid efficiency filter | 35 | 38 | 196 (26.5) | 222 (30) | |
| HEPA filter | 29 | 30 | 235 (31.8) | 271 (36.6) | |
† Percent of the total air pollution burden in Delhi avoided by the intervention in one year.