The term “smart building” was originally introduced by the European Union in the Energy Performance of Buildings Directive (EPBD) as one of the main enablers of the future of the built environment, particularly the building sector.
Smart buildings are able to manage their energy generation, performance and demand depended on asset use and the internal and environmental conditions 
2 Dakheel, J., Del Pero, C., Aste, N. and Leonforte, F., 2020. Smart buildings features and key performance indicators: A review. Sustainable Cities and Society, 61, p.102328.