Presidential Decree 59/2009 makes solar shading compulsory, the Tenda frangisole esterna meets the characteristics required by current regulations in terms of solar shading to be applied to the outside of a window to help improve the energy performance of living spaces. It is extremely effective in mitigating the overheating of your window pane and consequently reduces the passage of heat into the living space as it repels 90% of the sun's rays as well as protecting the fabric of the installed internal blinds from premature ageing. Made from a PES/PVC fabric, it is weatherproof. Once installed, it will follow the movement of the sash without hindering window rotation. It cannot be installed where there is an external shutter. Attention: Tenda frangisole esterna can only be installed on Windows model CLAUS B, DAB and Thermo OK.S.