Picture Windows 

Picture Windows are stationary windows, meaning they do not open or ventilate air. However, this fact means that they are not only more energy efficient than other types of windows, but it also means they can be installed in larger sizes when the view calls for it. And when your room really does require further ventilation, you can pair them with operable windows—such as double hung windows or casements—to create a room anyone would love to sit in.