TABLE 1.
Ranges of ambient temperature and relative humidity during testinga
| Test duct type and duration | Relative humidity (%) | Temp (°C) |
|---|---|---|
| Plastic, 5 air-vol exchanges | 9.0-28.0 | 11.6-15.7 |
| Steel, 5 air-vol exchanges | 25.3-39.9 | 9.6-15.6 |
| Plastic, 1,200 air-vol exchanges | 20.1-24.9 | 26.5-30.0 |
| Steel, 2,100 air-vol exchanges | 26.4-33.9 | 27.4-31.4 |
| Plastic, cyclic airflow, 5 h | 26.6-34.1 | 19.1-21.4 |
| Steel, cyclic airflow, 5 h | 22.0-22.3 | 24.1-24.9 |
a
Relative humidity was highest in the morning and decreased during the day as the temperature rose. The tests took place in the high desert over a 3-year period.