The aim of the project is to increase the energy efficiency of the public building M. K. Čiurlionio str. 12, Šiauliai, aiming to achieve the energy efficiency of the building in class C. reduce CO2 emissions of greenhouse gases into the atmosphere and ensure compliance of treatment facilities with hygiene standards. During the project, the 3 rd century building of the Psychiatry Clinic will be renovated, the walls are insulated, part of the windows, external doors, modernised heating system will be renovated and the room lamps to LED technology luminaires will be replaced, part of the electrical installation will be updated. After the implementation of the project, it is planned to save more than 30 % of the cost of heat energy and achieve the C class of energy efficiency of the building.