The aim of the project is to upgrade the energy efficiency of the building of the closed municipal gym of the city of Trikala located on the road Katsimidou, by changing its energy classification from category G of the Energy Efficiency Regulation (KENAK), where it is located today, in category B and above.The specific sports installation of the Municipality of Trikkaion, due to its age (built in the 1980s) requires important energy-saving interventions. The implementation of this project, with applications of energy innovation, energy saving actions and the utilisation of Renewable Energy Sources (RES), concerns the entire sports installation, with interventions in its building shell and electromechanical installations. The project aims to significantly reduce the energy and operational costs of the closed municipal gym, as well as its energy (carbon) footprint, while implementing the binding target of the Municipal Authority for the implementation of measures to protect against climate change, as recorded in the Strategic Operational Planning of the Municipality of Trikkaion 2014-2019.