10 Best Tankless Water Heaters 2026 in the United States

The Rheem 18kW 240V Tankless Electric Water Heater is a compelling option for those looking for an efficient, easy-to-install solution for their hot water needs. One of its standout features is the external digital thermostatic control with an LED display, which offers precise temperature control with +/- 1 degree accuracy. This makes it user-friendly and ensures you always get the perfect water temperature.

The Rheem RTEX-24 24kW 240V Electric Tankless Water Heater offers a robust solution for continuous hot water supply with its impressive flow rate of up to 5.9 gallons per minute, making it suitable for households with moderate to high hot water demands. One of its standout features is the 99.8% energy efficiency, which helps in reducing energy costs and promoting eco-friendliness. The electric fuel type simplifies installation and maintenance compared to gas models, although it does require a 240V electrical connection, which some homes may need to upgrade to accommodate.

The Stiebel Eltron Tempra 29 Trend is a compact electric tankless water heater that provides continuous hot water on demand without running out, making it well suited for households wanting energy efficiency and space savings. Its sleek design fits well in tight spaces, and being electric, it doesn’t require venting, which simplifies installation in many homes. With a powerful 28.8 kW output and a temperature range up to 140°F, it can comfortably handle the hot water needs for a medium to large household, especially in warmer climates or for moderate flow rates around 3-4 gallons per minute.