Seasonal Regional Differentiation of Human Thermal Comfort Conditions in Algeria

Table 1

Ranges of physiologically equivalent temperature (PET in °C) for different grades of thermal perception by humans according to Matzarakis and Mayer [30] with internal heat production, 80 W, and heat transfer resistance of the clothing, 0.9 clo.

PET (°C)	Thermal perception	Grade of physiological stress
<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