Abstract: A lightweight and low cost solar water heating apparatus which is comprised of an insulated container with a transparent cover enclosing a folded tank is provided. The tank is comprised of a lightweight material which is folded into a shape that allows any seams in the material to be held above the surface of fluid within the tank. The folded tank further contains a working fluid which absorbs solar energy when the tank is exposed to sun light through the transparent cover. A length of lightweight pipes is coiled in a serpentine fashion within the folded tank and is surrounded by the working fluid. Pressurized supply water flows through the serpentine length of pipe and absorbs heat from the working fluid as it travels through the folded tank. The heated supply water is then used as pre-heated supply water for a standard hot water heater.

Abstract: A solar concrete slab building specifically for a warm climate area including a motorized blower fan and duct means connecting solar wall collectors or cool ambient air to a unique pattern of mutliple air flow tubes embedded in the concrete slab and out an exhaust duct chase of thermal mass, provide means for preventing said air from contacting the interior of the building, thereby creating heat exchange type air flow paths within that heat or cool the thermal mass of the slab and chase. Hence, the occupant can direct off-time cycle temperature storage techniques to better moderate the interior heat in the warm season or the interior cold in the cold season.