Table 5.
Temperature, relative humidity, and air exchange rates measured during four seasonsa
| Parameter | Spring |
Summer |
Fall |
Winter |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median (n) | Range | Significance | Median (n) | Range | Significance | Median (n) | Range | Significance | Median (n) | Range | Significance | |
| Outdoor temp (°C) | 9.4 (5) | 7.0–16.9 | b | 22.4 (10) | 19.4–27.3 | a | 13.9 (9) | 8.5–16.3 | b | 0.75 (10) | –2.8–5.5 | c |
| Outdoor RH (%) | 69.0 (5) | 46.0–94.0 | bc | 62.0 (10) | 54.0–72.0 | c | 79.0 (9) | 65.0–95.0 | b | 97.0 (10) | 67.0–100 | a |
| Indoor temp (°C) | 20.3 (17) | 16.1–23.2 | ab | 24.2 (36) | 19.1–28.6 | a | 20.1 (31) | 16.1–23.1 | b | 19.3 (38) | 13.9–23.4 | b |
| Indoor RH (%) | 51.6 (17) | 40.1–81.5 | b | 57.3 (37) | 32.1–79.8 | ab | 64.4 (32) | 37.8–84 | a | 55.7 (37) | 35.5–68.8 | b |
| AER (rooms) (h−1) | 0.59 (13) | 0.017–2.51 | b | 2.03 (13) | 0.058–6.06 | a | 0.13 (13) | 0.00–0.96 | bc | 0.13 (13) | 0.00035–1.63 | c |
| AER (homes) (h−1) | 0.69 (5) | 0.11–1.95 | ab | 1.54 (5) | 1.040–5.01 | a | 0.14 (5) | 0.096–1.03 | b | 0.19 (5) | 0.030–0.53 | b |
a
For AER (rooms), medians are calculated from individual room measurements and only from a subset of the full data set (only rooms where airborne dust was sampled were used). For AER (homes), medians are calculated from the overall AER from each entire home. Values followed by the same letter are not significantly different.