40 gallon, electric, short water heater, single element 4500w, 240v element, 3" insulation, .95 energy factor,recovery at a 90� rise-gallons/ hours 21, first hour rating 55 , t & p valve, pex polymer lined heat trap nipples, pex dip tube, glass lined tank, aluminum anode rod, dimensions: 50"h x 22" diameter, 6 year tank & parts warranty, meets new naeca 2015 efficiency standards.