The purpose of this study is to design a hybrid system which is a combination of radiant cooling and low temperature air conditioning integrated with ice storage system. This paper reports the observed thermal environment of the chamber and results of experiments with subjects to grasp the optimum temperature and humidity of the room. In addition, a feasibility analysis for the hybrid system using conditioned air as a refrigerant was also studied with a computer calculations. This system produces comfortable environment and it is also possible to save energy consumption due to the reduction of electricity that could have been used on a fan.