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Development of new passenger-car climate control systems that contribute to improved comfort and decreased fuel consumption requires quantitative evaluations of thermal sensation and comfort. Therefore, a new evaluation method of the transient and non-uniform passenger-compartment thermal environment has been developed. Vehicle occupant's local thermal sensations are evaluated by using the local standard new effective temperature (SET*) that is calculated using a human thermoregulation model. The occupant's whole-body thermal comfort is then evaluated by local thermal sensation. The theory of the method and some example application results are introduced in this paper.