The object of the project is the thermomodernisation of the building of Primary School No. 7, located at ul. Tolstoy 1 in Tychy. The scope of the project includes in particular: — insulation of external walls with 14 and 16 cm thick polystyrene, – insulation and insulation of basement and foundation walls with 12 cm thick styrofoam, – warming of the roof with mineral wool layers of 15-22 cm thick, – replacement of window joinery in the sports segment and basements, – replacement of central heating installations together with radiators and hot water installations, – replacement of a heat node with a compact dual-function heating and hot-water node, – replacement of external emergency doors, – construction of a gravel band around the building, – replacement of lighting fixtures with LEDs, – dismantling and re-assembling the lightning system of the building. The investment will result in an annual reduction in CO2 emissions of 432.23 t/year and PM10 by 2.87 t/year.