Lifegard R440151 Quiet One Pro Series Agricultural Pond ECO-SAV runs cooler and generates more power with less energy consumption Internal recirculation prevents overheating and ejects obstructing debris Remarkable impeller technology provides combined rotors, improved shaft materials and corrosion resistant bearings EZ access cover allows ease of maintenance of rotor, shaft and removable impellers Innovative "cooling chambers" provide air-cooling during dry use and water cooling in wet applications