The historical evolution of the energy efficient buildings

The today energy efficient buildings are mainly related only to the available standards when their performances are described. This approach is correct just in terms of formal qualification to meet the requirements of the statutory rules and give people confidence. Beyond these facts, todays energy efficient buildings have to be known not only in the context of the existing technology, but also in the evolution of the equipment and the design concept used in synchronization with the contemporaneity of the science. In this paper, a historical laborious presentation of the techniques and concepts evolution that lead to energy efficient buildings as we know them today, is presented. An overview of the modern approach for the design of the main elements of such type of buildings is also presented. The paper realizes a review of the current state of the energy efficient buildings, in terms of definitions and characteristics.