1. 1. Experiments were carried out concerning the characteristics of wettedness revealed under constant average skin temperature using sitting-resting nude subjects. From the basic measurements of both environmental parameters and human physiological responses, the conclusions detailed below were proposed regarding the changes of wettedness under constant average skin temperature.
2. 2. There is positive correlation between the wettedness and environmental humidity, and negative correlation between the wettedness and air temperature.
3. 3. There is positive correlation between the evaporative heat loss from the skin surface and air temperature, and negative correlation between the evaporative heat loss and environmental humidity.
4. 4. There is negative correlation between the wettedness and evaporative heat loss.
5. 5. Wettedness is not constant but takes varying values, that is, corresponding to each average skin temperature both the maximum and the minimum wettedness values occur.
6. 6. Deriving from the items mentioned above, the theoretical locus of equal average skin temperature is not a straight line, but is a curved line plotted on the psychrometric chart.
Author Keywords: Wettedness; sweat rate; evaporative heat loss; equal average skin temperature line; psychrometric chart; ET*; thermal comfort
