Retractable glass window with thermally broken aluminum profiles, built to offer absolute protection from cold or warm weather. It employs double structural glazing which offer an extremely smooth outer surface. It consists of three (or two) frames, one of which remains fixed, while the other two are simultaneously retracted, freeing up the two thirds of the overall area of the opening. Depending on the space’s needs, the fixed pane is positioned at either the bottom end of the device – creating a glass parapet when open – or the top end, creating a glass entrance (recommended for shop applications). When the fixed pane is placed at the top, the panes are secured with electromagnetic locks when open, so that the device is safe to use when people walk under it. Motion is achieved by using an electrical cylindrical motor. Dimensions are dependent on the installation’s needs, with maximum recommended dimensions: 5m in height and 4m in width.