The Rheem Performance 36 Gal. Electric short water heater provides an ample supply of hot water for households with 2-people to 4-people. This unit comes with two 4500-Watt elements and an automatic thermostat which keeps the water at the desired temperature. A 240-Volt electrical connection is required for installation. A premium grade anode rod provides long-lasting tank protection. Factory installed temperature and pressure relief valve and 3/4 in. water connections are included with the water heater for easy installation.y.