Prevention of thermal buildup by controlled exterior means and solar energy collectors

A solar energy system for a building comprising, a plurality of interlocked flat solar energy collecting plate portions forming a portion of the building surface, each of said plates having a generally flat solar energy collecting surface, a folded over portion of the plate at one end of said collecting surface, said foled over portion being spaced from and parallel with one side of said flat solar energy collecting surface, a pair of overlapping reentrant folds formed in the plate, said reentrant folds being parallel with and spaced from another side of said flat solar energy collecting surface and at the end thereof that is opposite to said folded over portion, a web integral with said reentrant folds and generally perpendicular thereto to protrude past said flat solar energy collecting surface and said folded over portion, a further portion integral with said web for transferring collected solar heat from the solar energy collecting surface, tubes for removing solar energy from said collecting surfaces being in thermal contact therewith through said webs, a plurality of beams having notches formed therein in order to receive and support said tubes, and generally air-tight sheeting attached to said beams on sides thereof that are opposite to said notched sides in order to form a duct between said plate portions, said beams and said sheeting.