¹Based on estimated annual operating cost savings of the 40-, 50-, 65- and 80-gallon models. ²Based on comparison of 40- and 50-gallon Rheem ProTerra Heat Pump water heaters and standard gas ULN water heaters of like capacity. Efficiency varies by gallon capacity and based on comparison of 40-, 50-, 65- and 80-gallon Rheem ProTerra Heat Pump water heaters and standard gas ULN water heaters of like capacity. Efficiency varies by gallon capacity. ³Applies to Premium models only. Rheem leak-sensing data; testing under a vacuum lock using 50-gallon tank, no expansion tank, average tank pressure of 40 PSI, assuming no additional faucets are opened. ⁴Wi-Fi broadband connection and EcoNet App required; notifications are dependent on external factors beyond Rheem’s control; EcoNet is a registered trademark of Rheem Manufacturing company. ⁵Applies to Hybrid with LeakGuard models only; Rheem leak-sensing data; testing under a vacuum lock using 50-gallon tank, no expansion tank, average tank pressure of 40 PSI, assuming no additional faucets are opened. ⁶Based on reduction in energy use of Rheem Hybrid Electric Heat Pump water heater models with a 4.07 UEF compared to a standard residential electric 50-gallon tank type model with a .93 UEF. ⁷Based on review of water heaters available in the US Market as of January 2024. ⁸Wi-Fi broadband connection and Rheem Contractor App required; connection between water heater and app dependent on external factors beyond Rheem’s control. ⁹Based on comparison of the annual operating cost of a 40- and 50-gallon Rheem ProTerra Hybrid model which assumes the unit is on constantly throughout the year against the energy needed to power a single 100-watt incandescent light bulb constantly for one year.