Modern architecture has brought new opportunities with the development of industry and technology. Among other things, it has become possible to visually connect the interior and exterior spaces with transparent structures, while providing climatic separation. Since the first modern buildings of Frank Lloyd Wright and Mies van der Rohe, large glazed surface buildings have gained considerable ground. Through the examination of a case study, the research looks for the answer to which of the possible structural solutions for buildings with large surfaces of glass are double or triple glazing, the use of internal or external, or fixed or movable shading is it more beneficial from a building energy point of view, in order to create the comfort of the interior space. The tests were carried out according to the calculations of the 7/2006 TNM decree and also according to the rules of the 9/2023 ÉKM decree, in force from November 2023.