In my diploma thesis, I focused mainly on the costs of designing a low-energy single-family house and on the benefits in terms of reduced energy consumption over a period of several years. I have presented the individual measures of low-energy building, determined their costs, and demonstrated through a cost-benefit analysis (CBA) whether the individual investments are justified. I carried out the analysis using the example of a house that I designed in final year of the Secondary school of Construction in Novo mesto. I also presented the design of the ventilation system for the selected house in the thesis. I presented the individual parts of the system and explained its course through the building and its operation. For all cases, I have calculated the heat losses, the costs of the total investment and the cost recovery for the selected period. For the case of the selected building, it turned out that certain investments make sense and others do not, which I justified with a CBA.
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