THERMOLITE

metal window attachment system, not in the nature of shutters, for creating a double window pane comprised primarily of metal moveable tracks, a metal window frame, and metal window stops which are mounted in the window sill inwardly from an existing window and suitable for providing protection from bomb blasts, ballistics, hurricanes, and audio espionage; metal window attachment system, not in the nature of shutters, for creating a double window pane comprised primarily of metal moveable tracks, a metal window frame, and metal window stops which are mounted in the window sill inwardly from an existing window and suitable for providing increased energy efficiency; metal window attachment system, not in the nature of shutters, for creating a double window pane comprised primarily of metal moveable tracks, a metal window frame, and metal window stops which are mounted in the window sill inwardly from an existing window; metal window attachment system, not in the nature of shutters, for creating a double window pane comprised primarily of a metal secondary window frame unit that is mounted adjacent to an existing window unit