In a modern society where people spend more than 90% of their time indoors, the indoor air quality (IAQ) and thermal environment created by the building greatly influences the quality of life. Because people are staying indoors longer, the importance of IAQ issues is increasing with regard to controlling the health risk of residents. The quality of the indoor thermal environment also affects human thermal sensation and performance; hence, a comprehensive prediction method that integrates indoor air quality and thermal environment assessment is needed to design/ create a healthy, comfortable, and productive indoor environment. The overarching objective of this study was to develop a comprehensive and universal computer-simulated person (CSP) that integrates thermo-regulation and respiratory tract models for indoor environmental quality assessment. This paper (part 1) reports the external coupling procedure of virtual manikin and numerical respiratory tract by way of convective heat and moisture transfer analyses and also the improvement of thermo- regulation model by detail numerical analysis in numerical respiratory tract.
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