Table 1.

Perceived Temperature, Predicted Mean Vote (According to (6)), and corresponding thermal stress (Initial conditions without acclimatisation; negative values are ‘cold stress’ and positive values are ‘heat load’)

Thermal stress category	Perceived Temperature (PT) in °C	Predicted Mean Vote (PMV)	Thermo-physiological stress
4	PT≥ +38	Very hot	Extreme heat load
3	+32≤ PT<+38	Hot	Strong heat load
2	+26≤ PT<+32	Warm	Moderate heat load
1	+20≤ PT<+26	Slightly warm	Slight heat load
0	0<PT<+20	Comfortable	None
−1	−13<PT≤ 0	Slightly cool	Slight cold stress
−2	−26<PT≤−13	Cool	Moderate cold stress
−3	−39<PT≤ −26	Cold	Strong cold stress
−4	PT≤ −39	Very cold	Extreme cold stress