The ProLine® Lowboy Electric water heater with Top Water Connections is the reliable choice when you want to maximize hot water output and energy savings. With a 30-gallon (nominal) tank and dual 4,500 watt elements, the ENL-30 delivers a first hour rating of 44 gallons at a highly efficient 0.90 Uniform Energy Factor rating. Environmentally-friendly insulation and factory-installed heat trap nipples reduce heat loss for maximum energy savings. This ProLine® water heater is designed with A. O. Smith's superior commercial-grade tank protection. Advanced tank features include stainless steel CoreGard™ anode rod, Blue Diamond® glass lining and DynaClean™ automatic sediment-cleaning system, all designed to help protect the tank from the corrosive effects of water and extend the life of the water heater. All of these features are accompanied by a 6-year limited tank warranty. A. O. Smith’s ProLine® water heaters are residential products built to commercial-grade standards and are only available for purchase through professional wholesalers and contractors.