| PET/˚C | Thermal sensation | Psychological stress response |
| ≤4 | Very cold | Extreme cold stress |
| 4 - 8 | Cold | Strong cold stress |
| 8 - 13 | A bit cold | Cold stress |
| 13 - 18 | Comfortable | Mild cold stress |
| 18 - 23 | A bit warm | No heat stress |
| 23 - 29 | Warm | Mild heat stress |
| 29 - 35 | Hot | Moderate heat stress |
| 35 - 41 | A bit hot | Strong heat stress |
| ≥41 | Very hot | Extreme heat stress |