Nzeb

Developing nearly Zero Energy Buildings (nZEB) represents a path toward sustainablecommunities as required by the Energy Performance of Building Directive (EPBD). As consequence,nZEB target for new or existing buildings has become a mandatory priority for the multidisciplinaryresearchers involved in architectural engineering and building physics. Therefore, it is grown theinterest in design energy efficient measures for reaching the nZEB status of both new and existingbuildings. In this paper, the energy efficient measures adopted for reaching the nearly Zero EnergyBuilding standards, for a multi-floor residential building located in the Mediterranean area, arepresented. The extra cost necessary to reach the nZEB target have been calculated in the case of theenergy retrofit of an existing building (scenario 1) and in the case to directly realize a building withachieve the nZEB status (scenario 2). Further, the two scenarios have been compared under financialpoint of view. The results of this paper provide to builders and stakeholder useful information forquantify the convenience to build a nZEB building in advance in order to prevent the additionalexpenses necessary by future energy retrofit programs