The thesis presents vacuum insulated glazing in comparison to the insulating glass unit filled with inert gas. It describes the biggest problem of vacuum insulated glazing and presents solution. The first part describes component elements of a vacuum insulated glazing and insulating glass unit. Presented are all of the modes of energy transition through the glazing unit. Using various of glazing materials, we perform the calculations of construction physical parameters of glazing units in computer program WINDOW 7.2. With the program we compare coefficient of heat transfer, the transmission of solar radiation and the transmission of light between vacuum insulated glass and insulation glass unit. Second part of the thesis presents the innovative method of flexible edge sealing for vacuum insulating glass. Flexible edge was developed in Swiss Federal Institute EMPA as a part of Winsmart project which was accepted inside the Seventh framework programme or short EP7. Today's vacuum insulated glass unit on the market contains rigid edge seal. The temperature differences between the inner and outer pane causes the problem of differential expansion of the panes, which with a large temperature differences leads to bending and also breaking vacuum insulated glass unit. Winsmart project overcomes these problems by using the flexible edge seal. The thesis contains results of various tests made by developing the method and also the problems that we encounter by anodic bonding which is crucial to the flexible edge. We made three vacuum insulating glass units containing the innovating flexible edge which are presented including with there problems and weaknesses.