80 Gallon, Electric Heat Pump,, 4500W, 240V, 2.72 Energy Factor, Absorbs Heat From The Ambient Air & Converts To Hot Water Using HVAV Compressor Technology, Units Also Equipped With Standard Electric Heating Elements, Can Be Operated As Heat Pump Only, Hybrid Or Standard Electric Model, Heat Pump Is On Top Of Tank, Led Display, Aluminum Anode Rod, Vacation Mode Maintains 60 Degrees Temperature Up To 99 Days, 2.71 Efficiency Mode, In Hybrid Mode, 2.72, Electric Mode .92, Efficiency, First Hour Rating Gallon 76.3 Efficiency Mode, 91 Hybrid Mode, 88 Electric Mode, 10 Year Tank & Parts Warranty, 1 Year Labor, Energy Star Qualified, Dimensions: 69"H x 26-1/2"D.