NZEB into the existing building fund as an affordable solution

Abstract

A holistic approach with high level of replicability and financial feasibility for the public existing fund of buildings is undertaken, in order to transform existent public buildings, that are serving communities, into nearly Zero Energy Buildings. Finding large scale solutions from both technical and financial point of view, to reduce energy consumptions and CO2 emissions for the existent building fund represents at this point a major challenge for all stakeholders. Several existent educational units (kindergartens, schools, high schools) from a city in Romania were analysed, in order to improve their energy efficiency and to transform the typical existent educational unit into nZEB. A framework package of technical solutions is proposed and the effect of its implementation is analysed, in terms of energy consumptions and CO2 emissions reductions. Economic analysis is undertaken, to identify the feasibility of the nZEB concept implementation. An alternative approach is analysed for public authorities, in order to transform groups of existent buildings, which are serving communities, into nZEB.