The course deals with building thermal technology and energy efficiency of buildings in connection with smart energy (smart grid) of cities. Students will become familiar with calculation methods for determining and evaluating the energy efficiency of a building, including the preparation of the Energy Performance Certificate of a Building (PENB). As part of the energy assessment, students will focus on individual indicators that have an impact on the energy efficiency of a building. They will learn to evaluate the building envelope of a building, they will learn to quantify all the partial energies necessary for the operation of a building: for heating and cooling, for forced ventilation, for the preparation and distribution of hot water, for lighting the interior of the building. They will become familiar with the principles of digitalization of the energy distribution network in smart cities.