Energy efficiency is an area that is becoming more and more actual. To achieve energy efficiency, different approaches are required. These approaches must be based on ISO 50001 standard and directives of the European Union to assure quality. With the implementation of effective approaches, we reduce energy consumption, costs and extend the lifespan of heating systems, ventilation and air conditioning. Moreover, the comfort of the occupants is improved. The aim of the master thesis is to show the processes by which any building manager optimizes the use of energy with minimal investment. At the Faculty of electrical engineering, we have analysed the condition of the building and its systems of heating, ventilation and air conditioning. For the purpose of analysis, we thoroughly reviewed the state of electrical installations. Where necessary, we created new labels for mentioned installations. For the analysis, we created a tree structure and redesigned building layouts which contained electrical cabinets. With help of this analysis, we have developed procedures that can be performed at the faculty and are suitable for other similar public and private buildings. Soft measures are processes that users can implement themselves and contribute to lower energy consumption. We wrote what are the possible measures to regulate the heating station and what measures for the rooms. We wrote measures that would contribute to the improvement of air quality and a more optimal temperatures in the rooms without an excessive use of heating through the heating station. To determine the energy consumption costs of the faculty, Information system and Energy accounting system were established. A draft of Quality manual was made, which defines duties and persons who must perform these duties. Users often do not know what the procedures for the reduction of energy consumption are. That is why information courses are needed for employees, so that they get enough information to perform these procedures
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