ŠŤAVINOVÁ, Denisa: Geometric Characteristics of Timber Structures and their Effect on Energy Efficiency [Bachelor thesis] - Technical University in Zvolen. Faculty of Wood Sciences and Technology; Department of Mathematics and Descriptive Geometry. Thesis supervisor: RNDr. Tatiana Hýrošová, PhD. Degree of academic qualification: Bachelor. Zvolen: DF TUZVO, 2020. 47 pp. The aim of the Bachelor thesis was the statistical analysis of the effect of geometric characteristics of timber structures on the specific heat demand and energy efficiency of the structures. Theoretical aspects of the topic are analysed in the first chapter. The aim of the bachelor thesis is given in the second chapter. The third chapter deals with methodology of the thesis and methods of data processing. The fourth chapter is focused on the selection of objects for calculating the specific heat demand and verifying the hypothesis that the object with the smallest shape factor and the largest glazed area oriented to the south have the lowest heat demand. Using the analysis of variance - ANOVA it was confirmed that the effect of the factors – the shape of the structures and the orientation of the windows to the cardinal directions, on the specific heat demand for heating is statistically significant.