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Application of exponential regression to model time decay of normalized spore concentrations in air in continuous and cyclic airflow modes
| Duct material | Flow operation | Duration (h) | Regression equation | 1-log decay time (h) |
|---|---|---|---|---|
| Steel | Continuous | 7 | Ct/C0 = 0.00026t−0.45 | 174 |
| Plastic | Continuous | 4.5 | Ct/C0 = 7.64e−5t−0.60 | 48 |
| Steel | Pulsed | 5 | Ct/C0 = 1.1e−5t−0.29 | 53 |
| Plastic | Pulsed | 5 | Ct/C0 = 0.00052t−0.30 | 46 |
