Nowadays, we aim to lower energy consumption due to global warming and environment pollution of our planet. In addition to industry and traffic, a lot of energy is also used to heat the buildings, so we need to ensure that as less as possible of the indoor heat is lost to the environment. The thesis deals with the impacts of different types of windows on their heat transfer. The aim of the thesis is to investigate how, by selecting different window parameters, we can reduce heat losses and thereby save energy. The theoretical part explains the basic concepts that arise in dealing with the problem of heat transfer. It also describes the various components that are installed in the windows, and their effects on the heat transfer. The calculation part compares the heat conductivity of the various combinations of window frames and glazing. The results of the calculation show that the effects of some parameters on the heat conductivity are greater than the effects of others and that more attention should be paid to that when purchasing windows.
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