Thermal environment of the houses in Kansai area, Japan, was investigated in winter. This paper discussed indoor climate and thermal comfort. The main results are as follows; l) the ratio of occupants who did warming action such as to use kotatsu or electric carpet, as well as using heating such as air-conditioning and heaters was higher than that of occupants who used heating only, 2) the neutral temperature was 9.9℃(ET*) when occupants didn't do warming action, 3) the neutral temperature was 9.9℃(Tg), 10.9℃(OT), 10.9℃(ET*) when occupants wore much clothing, 4) more than 90% of occupants responded "acceptable", despite 70% of the temperature data varying from ASHRAE Standard55.
