50 gallon, hybrid electric heat pump, energy star qualified, dual standard 4500w 240v elements, 3.24 energy factor, absorbs heat from the ambient air and converts to hot water using hvac compressor technology, four operating modes, heat pump only, standard electric only, hybrid and vacation mode maintains 60 degrees temperature up to 99 days, side connection water inlet and outlet, heat pump on top of tank, easy to use electronic interface controlling set point, 2” non cfc foam insulation, aluminum anode rod, dimensions: 63” height by 22” diameter, 1st hour rating 95 gallons recovery at a 90 degree rise gallons/hr 21, 10 year tank and parts warranty, 1 year labor, 240 vac single phase 30 amp power supply, factory installed csa certified asme rated t&p. requires provision for condensate draining