Manufactured by Buderus, World Leader in Hydronic Heating, the G334X can be easily converted to propane. It is constructed with flexible GL-180M cast iron which is designed to resist thermal shock and a high silicone cast iron surface for excellent corrosion resistance for a long life. The G334X series offers a full 3” of thermal insulation for minimal standby heat losses, staggered contoured fins for optimum heat transfer, efficient operation and a deluxe, heavy gauge blue enameled jacket for a clean finished appearance. It has an integral draft diverter for a low profile and offers low emissions with premixed burner technology. The G334X is durable, quiet, and efficient. Buderus boilers are designed for many years of trouble-free operation.