: This paper presents the results of research on energy performance related to the energy consumption for space heating of school buildings (primary and secondary schools) located in the south region of the Federation of Bosnia and Herzegovina (SR FBiH). The research was conducted by collecting data from detailed energy audit documents on a sample of 47 school buildings in the SR FBiH and is part of a broader study aimed at analyzing the energy performance of school buildings in the FBiH and determining their relationship to heating energy costs through the development of new models for faster estimation of heating energy costs. The results of the research indicate poor energy performance of existing school buildings in the SR FBiH. The analysis of the delivered energy for space heating showed that the actual consumption is 67% of the predicted and indicates an energy gap between the actual and predicted values of energy consumption for heating. Reduction of energy consumption for space heating can be achieved by applying measures to improve energy efficiency.

This paper is part of broader research aimed at determining the relationship between energy performance and energy costs as a part of the operational and life cycle costs in school buildings in the Federation of Bosnia and Herzegovina (FBiH), as exceptionally important social and public buildings. The research was conducted by statistical analysis of data collected from documents of detailed energy audits (DEA) for 185 school buildings in FBiH in relation to construction periods. The paper analyzes the characteristics of buildings such as construction period, building envelope characteristics, climatic conditions, efficiency of installed space heating system, number of users and heating mode. The aim of this research was to determine the energy performance for the existing state and to compare them with the allowable values in accordance with the applicable legal regulations. There is a performance gap between predicted (calculated) and measured (actual) delivered energy for space heating. This research shows poor energy performance and provides a basis for developing strategies and plans to improve energy efficiency. The results of the energy performance of school buildings in the FBiH are the first step towards the development of a model for predicting energy costs.

: This paper presents the results of statistical analysis of collected data on the characteristics of envelope elements, as one of the key factors influencing energy consumption and costs, of school buildings (primary and secondary schools) located in the south region of the Federation of Bosnia and Herzegovina (SR FBiH). The shares of the areas of walls, floors, ceilings and openings in the total area of the envelope, as well as thermal characteristics expressed through the heat transfer coefficient or U-value, were analyzed. This research was conducted by collecting data from detailed energy audit documents on a sample of 47 school buildings located in SR FBiH, which has a Mediterranean or sub-Mediterranean climate. The average envelope U-value is 1.88 W/m2K, and the results of this study indicate very poor thermal characteristics of the existing condition of individual elements of the envelope, expressed by U-values, which are several times higher than the allowable values.