HEAT ENERGY CONSUMPTION IN UNRENOVATED BUILDINGS AND IN BUILDINGS AFTER PARTIAL RENOVATION

The aim of the present study was to analyse the heat energy consumption in public buildings. Our data contained information about more than 400 public buildings, including the data of the heat energy consumption depending on the use of the building, electric energy consumption and the data about the quantity and quality of windows in these buildings in 2008. The data were analysed dividing all public buildings into twelve groups: schools, special status education schools, day-care centres, hospitals, libraries, cult buildings, recreation centres, local government buildings, museums, sport centres, academy of music, and shelters. The largest groups are schools and day-care centres /kindergartens/. These two groups we analysed particularly. Our analysis focused on the heat energy consumption in buildings with new doublepane windows and frames from polyvinylchloride (PVC) with heat transmittance U <= 1,8 W/(m(2).K) and in buildings with simple windows divided into two-panes with two separate wooden frames (heat transmittance U >= 2,5W/(m(2).K). We analysed the data of the indoor air quality (IAQ) in three day-care centre buildings from March 11 to 16, 2011. The data analysis showed that partial renovation -change of the windows, doors etc. with and without heat insulation of the buildings -does not provide the heat energy consumption economy required by the Ministry of Economics by the year 2020, and in the majority of cases made consumption even bigger.