Evaluation method for clothing comfort and thermal environment with a thermal manikin are described in this paper. In real life thermal environment is not always uniform like in a climatic chamber. Recently in office spaces OA chairs are often used, but thermal insulation of chairs is not taken into account. In this report under the still air conditions, nude and clothed thermal manikin was exposed to measure skin temperatures and heat loss.
　Combined heat loss coefficient for nude condition was 7.9 W/m²℃ and convective heat transfer was estimated as 3.2 W/m²℃.
　Those at foot and hand were bigger than other parts and thigh and crotch were smaller. Estimation of clo value from heat loss, skin temperature of manikin, and equivalent temperature were discussed here. Thermal insulation of chairs was also measured. OA chair provides additional 0.15 clo insulation and it is corresponded to the 1 ℃ lower neutral temperature.

DESCENTE SPORTS SCIENCE Vol.16/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE