In this document two topics are exposed: (1) how the problems of the energy consumption and of the polluting emissions of the current constructions they can be reduced with the concept green building, and (2) how the sustainable applications, implemented in other countries, they could generate fnancial important savings and sustainability during the use of the Edifcio Electrica 2 of the Universidad Industrial de Santander that is in the process of design due to two factors: the decrease in the electric power demand and the use of the renewable energies in place. The review of the state-of-the-art, has as central aspects: the sustainable development, the exergy concept and the green building. This analysis of the information will allow establish the relevant aspects to take into account in the technical specifcations for the future design of the Edifcio Electrica 2.