WeatherWall's proprietary 4-track window system gives you a variety of ways to control your enclosure's environment. Each section has 4 window panels that slide up and down independently.Slide all 4 window panels up or down to open 75% of the area for ventilation. (Conventional 2-panel windows allow only 43% to 49% ventilation.) Slide 1, 2, or 3 panels to provide partial ventilation when the temperature dips. Close all 4 panels to create a conventional glass panel, to protect you from elements.The screen covering the entire Eze-Breeze panel is fixed in place, giving you protection from insects at all time. The WeatherWall sliding panel system provides:unobstructed views more ventilation than any other room protection from insects and changes in weather the openness of a screened porch combined with the protection of a sunroom WeatherWall also offers optional solar control on all our window panels.