Electric Heat Pump Water Heater; Inlet/Outlet Connection 3/4 Inch x 3/4 Inch; Relief Valve Details T and P Relief Valve Supplied; Number of Elements 2; Input Supply Rating 208 Volt; Tank Dimensions 22 Inch Diameter x 63 Inch Height; Tank Capacity 50 Gallon; Tank Warranty 10 Year Limited; Insulation Details 2 Inch Thickness Non-CFC Foam; Energy Saver Conformance Yes; Inclusions/Features Digital Display; Applicable Standard UL, CSA, AHRI; Energy Factor 3.42The ProLineĀ® XE Hybrid Electric Heat Pump reduces water heating cost by up to 68% through an innovative design that pulls environmental heat while dehumidifying and cooling the ambient air at the same time. 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.