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Unacceptable percentage of Operative temperature under different conditions.
| Condition | Equation y = PD x = Top/SET* |
Acceptable temperature range (°C) | Comfort temperature range (°C) |
|---|---|---|---|
| Without masks | y = 2.2063x2 - 115.97x + 1529.3 (Top) | 23.7–28.9 | 24.8–27.7 |
| y = 1.3999x2 - 72.662x + 949.41 (SET*) | 22.8–29.0 | 24.4–27.6 | |
| With masks | y = 2.0164x2 - 104.28x + 1355 (Top) | 23.3–28.4 | 24.6–27.1 |
| y = 1.2547x2 - 64.158x + 827.98 (SET*) | 22.3–28.8 | 24.0–27.2 |
