Abstract
In the design of a ceiling radiant cooling and heating system, it is important to calculate the indoor thermal radiant environment and heat performance of a ceiling radiant panel. From the results of heat performance experiment, we clarified the radiative and convective heat transfer coefficient of a ceiling panel . And we developed the heat exchange equation model of a ceiling radiant panel using fin efficiency. The calculated values of the heat quantity using this model give close agreement with the actual measured values. Therefore, this model can be used to design ceiling radiant panels.