我國關於空調型建築物節約能源設計指標之舊ENVLOAD公式，自1995年成立以來至今已逾22年之久。該公式由於採用1998-2002年之舊TMY2氣象數據，同時因為目前有些建築營運時間已經與22年前的情況甚有差異，使得該公式之信賴度不可避免被認為有衰退之情形。另外，由於近年來建築物日漸走向複合化、多樣化型態，使當年以單一建管分類對應單一基準的舊ENVLOAD系統已漸漸失去建築耗能預測之能力，同時也產生對大小規模建築物產生寬嚴不一的不公平規範現象。為了改善前述多項缺失，本研究採用目前國際最通用的eQuest建築動態耗能解析軟體與最新TMY3氣象數據，以「建築能源動態基準」之理論，由6類耗能特性空間分區之排列組合來加權計算ENVLOAD指標與基準值，如此可應付日新月異複合化、多樣化發展之建築型態，同時可保證建築節能法規有更公平的規範效益。本研究以實驗計畫法方式建立6類耗能特性空間分區之動態ENVLOAD回歸公式，其相關係數R高達0.884~0.957，證明這些新公式具有非常優良的建築能源預測功能，以此作為我國建築節能之管制工具應具有相當優異之信賴度。本研究設定新舊ENVLOAD公式對於建築市場有相同淘汰率，預計將有50~60%外殼熱性能設計較優的建築市場可保證其合格。內政部營建署同時也將過去屬於較不精準之AWSG指標所管制之建築物大量移入新ENVLOAD指標來管制，這將使我國的建築節能管理政策更加有效而落實。

Taiwan’s energy conservation index about air-conditioning (AC) buildings, ENVLOAD, has been carried out for more than 22 years since it was established in 1995. As a result, the reliability of the ENVLOAD formula has been placed under doubt and is expected) to suffer deterioration due to the original ENVLOAD formula adopting early meteorological data(TMY2), from the period between 1988-2002. Also, the recent building operation hours have become quite different as compared to 22 years ago. On the other hand, recent buildings are more diversified and complex in terms of their functions and space allocation, hence the prediction accuracy of the original ENVLOAD, which follows a single building type with one standard index, has been decreasing. At the same time, it resulted in a wide range of unfair norms on different scale with respect to buildings. To improve the inadequacy mentioned above, this study combined most of the general software eQuest and the latest meteorological data, TMY3, together with the theory of “Dynamic Criteria of Building Energy” to calculate the ENVLOAD index and its’ design criteria by six different functional areas with equal weightage. In response to the ever-changing and complex building types and developments, the improvements could ensure fairness of the building energy efficiency regulations and it could continue to produce more benefits.This study bases on the “Taguchi’s Orthogonal Arrays” and establishes the dynamic ENVLOAD formulas of six energy consumption characteristics, and the correlation coefficients (R) are all above 0.884. It proves that the dynamic formula contains great capabilities of making building energy prediction, and the formula could be used to serve as our building energy saving regulatory approach with great reliability. The study adopted the same mortality rate of building market condition between dynamic ENVLOAD and the original version, and we could ensure that about 50~60% complies with the envelope thermal design and is better than usual cases. With regards to these changes, Taiwan’s Construction and Planning Agency, MOI, have ordered certain buildings that were previously under the restrictions of AWSG criteria to be evaluated under the new restrictions of dynamic ENVLOAD criteria. Hence, with these implementations we could make our building energy efficiency management policies more effective.