Keywords: EAC, full-scale experimental Validation, ABRI Lab, VRV The VRV air-conditioning system has been gaining overwhelming popularity in recent years due to its superb merits such as high energy efficiency, lower power consumption, low noise and increasing thermal comfort. During last phase of study, computer simulation using the DOE 2.1 as a tool has been performed systematically to establish a calculation equation for the EAC for Green Building Evaluation Indexes, in replacing the currently adapted fixed constant of 0.8. It is the goal of this year¡¦s project to further validate this equation by conducting a series of full-scale experiments at the ABRI Tainan Laboratory. The experimental result will be organized as a model to revise the equations established during last phase of study with good accuracy. Various different VRV systems which were commercially available on the local air-conditioning market will be adapted so that comparative study can be performed among them. The IPLV curves, which are the essential performance curve of each specific VRV system will then be obtained under local weather conditions. It is expected that through the execution of this project, the calculation equation of the VRV system to be adapted in the Green Building EAC evaluation index will be finalized and validated by the full-scale experiments. The test facilities established during this phase of study will then become the most suitable location of similar tests when building energy conservation is concerned.