The sun protection louvers provide two of the most important aspects in contemporary construction – the protection against overheating during summer and controlled access of natural light. These features ensure comfort and overall improvement of the living environment for the inhabitants and contribute to the energy efficiency of the building. The system offers multiple variations and hanging methods. In addition, the ETEM team has developed ETEM Pro software which determines the general energy properties of complex façade structures, forecasts the energy effect and analyses variations and optimization of combined structures.