The aim of the task is to reduce the costs of heating and electricity, as well as to reduce the emission of pollutants into the atmosphere and to improve the thermal comfort in the rooms of the swimming pool building at Poviat School Complex No. 2 by K. Miarki in Pszczyna at ul. Szymanowski 12. The result of the task will be insulation of external partitions, replacement of window and door joinery, modernised installation of central heating and mechanical ventilation with heat recovery function and photovoltaic microinstallation on the roof of the facility. The project plans to: — insulation of the roof with PIR foam with a thickness of 15 cm, — insulation of external walls with a thickness of 15 cm, — replacement of window-door joinery, — modernisation of the c.o.o. installation (including replacement of radiators and installation of thermostatic valves), — installation of mechanical ventilation and exhaust ventilation with heat recovery function, — construction of photovoltaic microinstallation on the roof of the building.