The series of mullion-transom facades with thermal break is designed for outside use. The system enables to create large format glazing at the same time the narrow width of the visible profiles (52mm). A wide range of depth internal support profiles and external masking profiles provides complete freedom in the design of the elevation. In the standard version of Kratos system coefficients Uf can be compared to HI version from the competing systems. There is also version of half structural glazing without visible external profiles - Kratos SSG. It is proven in the construction of glass curtain walls and filling walls in commercial buildings.