Abstract: An active solar air heat storage system slowly transfers heat into water, providing heat while keeping mold and dust out of a building. A series of bidirectional air ducts separated by periodic wind gaps reduces an overhead collector array's uplift in high winds. Splitting a rock bed's airflow into multiple air channels slows air velocity and reduces air friction in the rock bed. A circular rock bed made partly of concrete blocks is held together by bands around the circle's outside. Solar heat may be gathered under driveways and walkways. A standard set of driveway bricks will allow gentle curves in the driveway while retaining a closed airflow under the driveway. Radiant heat may be trapped inside a collector.

Abstract: A linear trough concentrates sunlight through a long target window in a greenhouse's roof or north wall. Heat is stored in a geothermal heat bank below the greenhouse's center, where a thermal skirt around the greenhouse reduces heat loss.