Lonnie Busch shows off his Window Rig for Cinema 4D which will allow you to create double-hung Windows in a variety of ways easily for your Architectural Models and renders in Cinema 4D.
With this versatile rig you can create multiple double-hung windows with or without casing, change window size and count, window frame size, window dividers, sill, blinds, glass, and more. Materials in rig are just placeholders
Window Rig makes it really simple to not only create the windows themselves but drop them into walls providing you a control to associate the window to the selected wall.
Window Rig also provides a suite of controls for Window Count, Window Height and Width, Frame Thickness, Glass Pane visibility, and tons more. Check out the free Window Rig for Cinema 4D over at C4DTools here.