Abstract: A force resistant panel system is provided where a window pane is bordered by a sash and magnetically attracted to an exterior flange. The exterior flange is attached to an opening in a wall, facing outward. An interior flange with a channel is attached to the inside and facing inward. The exterior flange and interior flange combine to form a channel for which the window pane can travel in the event of a blast. Decorative trim snaps into a groove on the interior flange and generates static outward pressure against the sash.

Abstract: An interior storm window assembly, mounted to an interior building wall over a window opening containing a prime window therein is provided, having double hung, vertically movable window pane members received within opposing, self-locating vertical channels and pivotally attached to adjustable weight balancing elements within those channels. The frame structure of the window assembly, including the peripheral rail about each window pane member and the vertical channels, is formed from plastic material, such as vinyl, having low thermal conductivity, and a rigid, reinforcing rod, preferably of metal, is inserted within the plastic rail at the bottom of each window pane member. The vertical channels apply pressure inwardly to those peripheral rails to releasably retain the window pane members in vertical orientation as well as urge the peripheral rails laterally into sealing contact with the vertical channels.

Abstract: An interior insulative window is provided which is mounted outside of the prime window opening to the window opening frame and/or adjacent wall surface. This interior window is internally formed with decorative trim off-site and installed as a single unit which does not penetrate the window opening. The mounting frame can optionally include mounting space for receiving a venetian blind to be retained between the prime window and the interior window. For decorative consistency and/or further thermal efficiency, the corresponding structure can be applied to sliding patio doors.