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Analysis of Thermal Comfort in an Office Environment with Underfloor Air Supply in a Tropical Climate

Research on office building environments with ceiling air distribution has demonstrated that thermal comfort has not been well promoted, with 30% of Brazilian users expressing dissatisfaction. The underfloor air supply system, which has been adopted to tackle these concerns, was evaluated in laboratories to fill the lack of information in this field. The results of this research show that thermal conditions created by this system fulfill the thermal comfort requirements. However, the operative temperature limits of discomfort are slightly higher than those adopted by ISO 7730 (ISO 1994). Parameters of thermal comfort and of system operation are presented in this paper.