The Voltex® Hybrid Electric Heat Pump reduces water heating cost by up to 73% through an innovative design that pulls environmental heat while dehumidifying and cooling the ambient air at the same time. This heat pump technology delivers tremendous savings by generating heat through the heat pump technology instead of the heating elements. It offers premium features including a user-friendly display, vacation mode to save money while you are away, and a heavy duty anode that protects your tank for 10 years. In addition to the heat pump technology, this model also has two heating elements that help the water heater recover quickly during periods of high demand. This Heat Pump is Northwest Energy Efficiency Alliance (NEEA) qualified. This ProLine® XE 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 10-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. ProLine® XE models feature versatile high efficiency technologies.