Abstract: An enclosure for drying and storing grain or crops utilizing solar energy wherein an entire structural side (wall or roof) is of transparent material. An inner wall is positioned adjacent the transparent wall and an absorbent material is positioned intermediate the transparent and inner wall. The inner and outer walls form a duct for the passage of air past the absorbent material. The heated air is directed to a plenum/manifold which in turn is connected to a tubing having a multiplicity of perforations (ports) therein. The tubing extends back and forth in an array over the entire floor of the enclosure. The air passing upwardly through the ports in the tubing array provides a uniform distribution of heated air to the crops placed in the enclosure.