10 Best Tankless Water Heaters 2026 in the United States

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 Rheem RTG-95DVLN-3 is a natural gas tankless water heater designed for indoor use, offering a strong flow rate of 9.5 gallons per minute. This means it can supply enough hot water to run multiple fixtures at once—like a shower and dishwasher—making it suitable for medium to larger households. Its energy efficiency rating of 0.82 is decent for this type of non-condensing model, helping save on energy costs by only heating water on demand. The heater also includes a water-saving setting that claims to save up to 1,100 gallons annually, which is a nice bonus for reducing water waste.

The Rheem RTEX-11 is a compact electric tankless water heater designed to deliver continuous hot water on demand. With a flow rate of up to 2.68 gallons per minute (GPM), it works well for point-of-use applications like a single bathroom or kitchen sink but might struggle to supply multiple outlets simultaneously. Its self-modulating power control helps maintain consistent water temperature, and the easy-to-read digital LED display allows you to adjust settings precisely. Operating on 240 volts with 11kW of power, it is energy efficient with a 99.8% efficiency rating, which can help reduce electricity costs compared to traditional tank heaters.