AUTHOR=Hosamo Haidar Hosamo , Nielsen Henrik Kofoed , Alnmr Ammar Njeeb , Svennevig Paul Ragnar , Svidt Kjeld TITLE=A review of the Digital Twin technology for fault detection in buildings JOURNAL=Frontiers in Built Environment VOLUME=Volume 8 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/built-environment/articles/10.3389/fbuil.2022.1013196 DOI=10.3389/fbuil.2022.1013196 ISSN=2297-3362 ABSTRACT=This study aims to evaluate the utilization of technology known as Digital Twin for fault detection in buildings. The strategy consisted of studying existing applications, difficulties, and possibilities that come with it. The Digital Twin technology is one of the most intriguing newly discovered technologies rapidly evolving; however, some problems still need to be addressed. First, using Digital Twins to detect building faults to prevent future failures and cutting overall costs by improving building maintenance is still ambiguous. Second, how Digital Twin technology may be applied to discover inefficiencies inside the building to optimize energy usage is not well defined. To address these issues, we reviewed 326 documents related to Digital Twin, BIM, and fault detection in civil engineering. Then out of the 326 documents, we reviewed 115 documents related to Digital Twin for fault detection in detail. This study used a qualitative assessment to uncover Digital Twin technology's full fault detection capabilities. The results of this study will point out important technical and practical issues as well as potential research areas for future direction.