The project concerns the energy upgrading of the closed sports center Kanethos Chalkida Tasos Kamouris" in category B+ of the Energy Performance Regulation of buildings (KENAK).The building of the Sports Center, covering 3.490 m² and surface use of 3.650 m², has a playing area made of parquet and markings and equipment for basketball, volleyball, handball and football halls, while it can also host sports games: Wrestling, taekwondo, karate, rhythmic gymnastics, trampoline. It is ranked in the Category of Sports Facilities of Team F according to paragraph 1 of Art.4 of Law 4479/2017, where international competitions or professional categories are held. It has 1,120 spectators, with a capacity of 500 (a total of 1,620 seats) with a folding platform. Shall be a high-access sporting area of particular trans-local importance, hosting, throughout the year, professional matches, as well as actions at national and European level, ensuring accessibility of the disabled.The purpose of the interventions provided for in this project is to minimise the energy consumption of the building, to ensure the operation of the building, with thermal comfort conditions, to the indoors and to the efficient energy behaviour of the building throughout the year.