No, windows fail, as can be seen by reviewing the linked pages. Windows are not the same: - Windows do not passively aid circulation of warmed air, which the

No, windows fail, as can be seen by reviewing the linked pages. Windows are not the same: - Windows do not passively aid circulation of warmed air, which the panels are particularly designed to do. - Windows also do not passively reduce or eliminate overnight-losses of energy (heat) on a cold night (consider negative-centigrade temperature or less), which the linked-to design does do, by passively preventing circulation of air that would cool the building overnight The design linked-to is specifically designed to passively deal with the prevention of the transfer of heat outside on a cold night, among other things, including limited cost, simple construction, and rapid payback over the life of the building in a cold winter environment. Windows fail as a passive solar source. Diurnal intervention required for windows.