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 Stiebel Eltron Tempra 24 Plus is a well-designed electric tankless water heater that’s great for providing continuous hot water throughout a home. Thanks to its Advanced Flow Control technology, it keeps water temperature steady even if multiple taps are in use, which means fewer interruptions during showers. This model has a strong 24kW power rating and requires a 240V, 150A electrical service, so it's important to ensure your home's wiring can support it before installation.

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.