Hello, These are not windows. These are custom made frames with screens. When the weather gets cold the homeowner can remove the screen/frames and insert custom made laminated glass panels for the winter. The screens and laminated glass panels are easily stored under the porch in a custom made slotted rack that we built for the homeowner. The porch is heated with four infra-red electric ceiling mounted units.

What brand are the ceiling mounted units?

Weather Shield