We are authorized Atmor retailers! Your purchase comes with a 2 year warranty against defects And a 7 year warranty against leaks! Atmor 13kW240V Supreme Series Tankless Electric Instant Water Heater Brand new in the original sealed retail box! Features Did you know in most US homes, the heating of water is usually the second largest energy expense, after space heating and cooling? Typically, storage tank water heating can account for up to 30% - 50% of the average home energy bill. Waiting for the hot water to reach the faucet, finding yourself with no more hot water while having to wait for the tank to fill up again, constantly heating a storage tank of water even when it’s not in use all add up to this expense. What if there was an all-around solution that saves you money, time, energy and resources? The Atmor Supreme S901-13 Tankless Electric Instant Water Heater is the convenient eco friendly and efficient solution you have been looking for! The Supreme S901-13 delivers an endless supply of hot water instantaneously at the point of use only when you need it. Depending on your climate, the Supreme S901-13 can be used for up to two applications (ie sink and shower); ideal for a full bathroom solution. The Supreme S901-13 can heat up to 2-Gallons per minute. This is the equivalent of one shower head (1.5 GPM) and one sink (0.5 GPM). When sized properly, the Supreme S901-13 will provide endless hot water. Controlling the flow rate (Gallons Per Minute) into the unit is essential to ensure proper consistent temperature rise in order to meet your desired hot water temperature. A Pressure Relief Device (PRD) is included with your unit and must be installed on your water heater inlet cold water connection.