WinSLT is the software solution to calculate photometric, solar and heat-technical characteristics of glazing (single or VSG) in combination with sunscreen and PVB films. It can be created in a short time, any structure and the following standards: - EN ISO 673 -> Ug value - EN 410 -> g-value, reflection, absorption, transmission - EN ISO 52022-3 -> g (total) value - ISO 15099 / ASHRAE -> Ug-value SHGC value, reflection, absorption, transmission be calculated. The certified by the ift-Rosenheim software also creates a Declaration of performance and CE marking of the glazing.