In my dissertation, I focused on energy renovations of multi-apartment buildings, a topic which has been at the forefront in recent years. I have designed a general multi-apartment building with average parameters and calculated the energy use in the existing state. Regarding renovations, I focused on the thermal envelope of the building, which is most often carried out in practice. With the help of the software tool for calculating the energy balance of the building, I analysed the building in its initial state and after the implementation of thermal insulation of the facade, replacement of windows and doors, attic insulation and the entire renovation, which includes all three energy measures. The obtained values of the analysis were the starting point for the survey questionnaire, with which I asked the residents of a multi-apartment building how acceptable individual measures are to them. In the survey, I also presented initial investments per apartment of average size (55 m2), annual energy savings needed for heating per apartment and return on investment according to the most commonly used energy sources in multi-apartment buildings (heating oil, natural gas and district heating). For each energy renovation measure, the approximate working time, noise level and possible specifics of the measure were also stated. The results showed that energy measures are generally acceptable among both owners and tenants, with the most important reason for acceptance being the reduction in heating costs. The most common reason for the inadmissibility of any measure, however, was the amount of the initial investment. From the results, I can conclude that obtaining approvals for the renovation of a multi-apartment building that requires 75% consent of the owners is not problematic, but it makes sense to systematically present energy renovations, advertise and encourage the possibility of using grants.
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