Table 1.
Summary statistics of indoor radon concentrations for all scenarios
| Scenarios | Radon concentration (Bq/m3) | Percentage >200 Bq/m3 | ||
|---|---|---|---|---|
| Mean | Median | 95th centile | ||
| Present (baseline) | 21.2 | 12.5 | 73.3 | 0.6 |
| Scenario 1 (air tightness) | 33.2 | 19.5 | 121.2 | 2.0 |
| Scenario 2 (air tighteness+purpose-provided ventilation) | 25.5 | 13.9 | 94.6 | 1.2 |
| Scenario 3 (as for scenario 2+MVHR) | 19.6 | 11.1 | 69.8 | 0.5 |
| Scenario 4 (as for scenario 3+10% failures in MVHR) | 21.8 | 11.8 | 85.3 | 0.6 |
MVHR=mechanical ventilation and heat recovery systems.