Sun Frost recently developed a solar oven capable of air sterilizing medical equipment. For air sterilizing temperature of 190C must be achieved for 6 minutes. The heart of the sterilizer is an evacuated tube solar collector. The interior of the oven is cylindrical in shape and is 11.5cm in diameter and 91cm long. The tube is essentially a Thermos bottle. The interior can be 190C and the exterior will be at room temperature. Because heat losses are so small sterilizing temperatures can be achieved even in marginal solar conditions. The oven walls are glass. We are currently looking for applications for this technology. If you have suggestions please let us know.