Table 1.
Summary of air-exchange and outdoor air proportion measurements
| Location | Volume, m3 | N∗ | Total ACH, mean ± SD | MSE† | Outdoor air proportion | Precision, %‡ | Mean outdoor ACH§ | Outdoor air, m3/h |
|---|---|---|---|---|---|---|---|---|
| Lung Function Laboratory | 168.5 | 3 | 8.5 ± 0.8 | 0.03 | 0.57 | 25.3 | 4.9 | 817.4 |
| ED isolation room | 23.5 | 3 | 23.8 ± 1.5 | 0.16 | 1.0 | – | 23.8 | 559.7 |
| Consulting room A (closed) | 31.5 | 3 | 7.0 ± 0.1 | 0.01 | 0.28 | 14.2 | 2.0 | 62 |
| Consulting room A (open) | – | 3 | 13.2 ± 1.1 | 0.06 | – | – | 3.7 | 117.3 |
| Consulting room B (closed) | 36.0 | 3 | 6.1 ± 0.1 | 0.01 | 0.28 | 14.2 | 1.7 | 62.1 |
| Consulting room B (open) | – | 3 | 9.1 ± 1.1 | 0.02 | – | – | 2.6 | 92.6 |
∗
Number of ventilation measurements.
†
Mean standard error of line fit to CO2 decays.
‡
Precision of outdoor air proportion measurement.17
§
The number of outdoor ACH was equal to the measured ACH rate multiplied by the proportion of outdoor air supplied.