Abstract: A solar collector includes a plurality of panels overlapped along one direction such that each panel overlies a portion of one adjacent panel and underlies a portion of another adjacent panel to define overlapping areas. The panels are slightly transversely spaced from one another in the overlapping areas for flow of air therebetween to a plenum chamber at least partly enclosed by the panels. Heat absorbed by the panels from solar radiation is transferred to air flowing over the panels and through the spaces in the overlapping areas.

Abstract: A solar air heat collector includes a generally rectangular box-like housing of thermal insulating material and having an open front closed by a transparent plate. A corrugated solar heat absorber panel is supported in predetermined spaced relationship to the housing back wall in a location intermediate the transparent plate and the housing back wall by support rails extending along the housing side walls. A substantially sealed air space is defined between the transparent plate and absorber panel, and an air flow passage is defined between the absorber panel and the housing back wall.