Human Bioclimatic Conditions, Trends, and Variability in the Athens University Campus, Greece

Table 1

Physiologically Equivalent Temperature (PET) for different grades of thermal sensation and physiological stress on human beings [42].

PET (°C)	Thermal sensation	Physiological stress level
<4	Very cold	Extreme cold stress
4–8	Cold	Strong cold stress
8–13	Cool	Moderate cold stress
13–18	Slightly cool	Slight cold stress
18–23	Comfortable	No thermal stress
23–29	Slightly warm	Slight heat stress
29–35	Warm	Moderate heat stress
35–41	Hot	Strong heat stress
>41	Very hot	Extreme heat stress