The nEBULA project targets mainly students and young professionals . The main impact of nEBULA on (future) engineers, architects and technical experts dealing with retrofitting is to increase their awareness on ee and direct them towards design including the ee-concepts and regulations. By using the nEBULA app and through its networking they will be able to embed energy efficiency into their retrofitting designs, applications and/or related products and be able to access the guidelines and technical to-do tips during their professional life.