National technical university of Athens (NTUA) - Project coordinatorwww.ntua.gr Municipality of Vari-Voula-Vouliagmeni (VVV)www.xo.gr Institute for Solar Technology SPF University of Applied Sciences HSRwww.spf.ch The Catalonia Institute of Construction Technology (ITeC)itec.cat The Catalonia Institute for Energy Research (IREC)www.irec.cat