**5. Conclusion**

This chapter aims to present a comprehensive view of the key issues related to the development of zero energy building including the definition, supporting incentives, evaluation criteria, design methodologies, and uncertainty analysis. Although a wide range of researches can be found to investigate one aspect of the ZEB study, there are still a lot of challenges faced to be solved in the future:


region considering the applied energy systems and its financial support. So, it is necessary to identify and classify the key factors affecting ZEB performance for different conditions.

