Authors proposed a new three-dimensional human thermal model that satisfies the following four points. 1) The blood mass is conserved despite the vasoconstriction and vasodilation. 2) Three dimensional temperature distribution is produced in the human body. 3) Hot condition provokes increase of blood flow rate in superficial veins, 4) Thermal conduction in subcutaneous fat layer is calculated directly using temperature difference in this layer and the thickness of this layer. As the application of this model, the authors predicted thermal comfort in non-uniform clothing conditions reported by Olesen et al.(1988). The predicted comfort sensation agreed well with the reported results.
