Retrofitted Existing Residential Building Design in Energy and Economic Aspect According to Thailand Building Energy Code

Electrical energy usage in buildings is a challenging issue because many old were not originally built to achieve efficiency. Thus, retrofitting net-zero can benefit both the owner and electric utilities. In this study, BEC (building code) software was used evaluate aspects of retrofitted compliance with Thailand’s building code building. addition, economic also studied verify feasibility for project’s invest existing An residential Thailand as case study. The results terms after into show that total consumption be reduced by 49.36%. From an perspective, investment cost compensated saving discounted payback period (DPP) approximately 4.36 years has IRR (internal rate return) value 19.23%. This result evidences potential economy code, implementation benefits on electrical utilities owner.