10 Best Electric Tankless Hot Water Heater 2025 in the United States

The Stiebel Eltron Tempra 29 Trend is an electric tankless water heater designed for those seeking a continuous supply of hot water. One of its standout features is the ability to provide on-demand hot water, which means no more unexpected cold showers. With a flow rate of up to 9.5 gallons per minute, it can serve an entire household, making it ideal for families or homes with high water usage needs.

The Rheem 18kW 240V Tankless Electric Water Heater is designed to offer an on-demand hot water solution for homeowners looking to save space and energy. With a flow rate of up to 4.4 gallons per minute (GPM), it can efficiently supply hot water for multiple outlets at once, making it suitable for medium-sized households or apartments. One standout feature is its external digital thermostatic control with a precise +/- 1 degree accuracy, allowing users to easily set their desired water temperature.

The Rheem RTEX-24 is a solid choice for anyone looking for an electric tankless water heater, particularly for residential use. One of its key strengths is its impressive flow rate of up to 5.9 gallons per minute, making it suitable for medium to large households where multiple hot water outlets may be used simultaneously. Its self-modulating power control ensures that the heater adjusts energy use based on demand, which can help in energy savings. With an energy efficiency rating of 99.8%, this unit can significantly reduce your utility bills compared to traditional tank heaters.