Rheemglas ® Energy Miser ® Electric Water Heaters--------------------------------------------------------------------------------Available Capacities:2-1/2, 6, 10, 15, 20, and 30 gallon modelsAvailable Warranties:6-year limited tank and parts warranty--------------------------------------------------------------------------------Features:Space-saving design for installation in limited spaces High efficiency heating element Temperature and pressure relief valve included Over-temperature protector cuts off power in excess temperature situations Automatic thermostat keeps water at desired temperature