In the forties decade of the past century, when I was born, Jean Prouvé was designing a lightweight facade solution that today serves as model for the design of enclosures: the facade of windows. The window, understood as an opening filled by a system of filters that connect us to the exterior, reached its peak design at the end of the 19th century with the balconies of our urban expansion areas. The sophisticated overlapping of blinds, glass sheets and shutters, with hinged shutters and vent lights, rounded off with drapes and net curtains, optimizes the flow of energies to achieve the desired comfort for each circumstance, each season and each moment of the day... [+]