In the context of the energy upgrade study, existing window frames were replaced with new aluminum frames, featuring thermal break technology and energy-efficient glass panels. A total area of 1,370.26 m2 was covered, with 66.66 m2 of window frames, of which 1,037.50 m2 carry thermal insulation rolls. At the same time, the external thermal insulation of vertical structural elements was suggested, covering a total area of 4,459,07 m2. Moreover the study included thermal insulation on the flat roofs, covering a total area of 1,933.95 m2, as well as thermal insulation on the tiled roof of the building, covering a total area of 509.11 m2.