The Centre for Renewable Energy Sources and Saving (founded in September 1987) is a public entity supervised by the Ministry of Environment and Energy. CRES is the National Centre for Coordination in the fields of Renewable Energy Sources (RES), Rational Use of Energy (RUE) and Energy Saving (ES). Its primary goal is the research and promotion of technological applications in the above-mentioned fields both at a national and international level, as well as the support of related activities, taking into consideration the principles of sustainable development. CRES is participating in projects related to the next-generation EPCs. The Energy Information Systems & Planning Department of CRES is responsible for the design, implementation, day-to-day running, user support and system administration of the Greek Energy Performance Certificates Registry while CRES is participating in the Concerted Action EPBD.