Abstract: A solar heat collector having a radiant energy transmitting cover which is mounted relative to the supporting frame for the collector in a manner to permit thermal expansion in two orthogonal directions in the plane of the cover and wherein sealing strips are provided to keep the collector sealed from external elements while permitting such expansion.

Abstract: A large scale solar heat collector system which utilizes a building design to permit substantial areas of perforated heat collector sheets to be mounted and through which sheets air is passed to transfer the heat from the collector sheets to the air. The collector sheets are supported and mounted in a manner so that they can expand and contract under thermal variations even when exceedingly large areas are used to thereby permit mounting collector sheets that have a substantial area in a low cost, economical wy to permit large amounts of heat to be collected and stored in a single installation.

Abstract: An extruded radiant energy transparent cover used with solar heat collector assemblies, and made into modules that are retained in position with support members which securely hold the cover in place. The extruded cover panels are of preferably elongated side by side tubes molded with common walls. A support rib is aligned with each of the walls. Where two of the modules join, two support ribs are placed contiguous, and are held in the same support members as the single ribs. Thus the installation is simplified by the lack of necessity to provide special brackets for holding the modular sections together.