10 Best Tankless Water Heaters 2025 in the United States

The Rheem RTGH-95DVLN-3 is a solid choice for those in need of a tankless water heater, especially for residential use. With a flow rate of up to 9.5 gallons per minute, it can easily meet the hot water demands of larger households or simultaneous usage across multiple fixtures. Its energy efficiency rating of 0.93 ensures that it operates economically, which can translate to lower energy bills over time.

One standout feature is the integrated digital display, making it easy to monitor and adjust temperature settings, which range from 100 to 140 degrees Fahrenheit. This adaptability allows users to find a comfortable temperature that suits their needs. Additionally, the natural gas fuel type is generally more efficient than electric options, further enhancing its appeal.

On the downside, installation can be a bit tricky if you're not familiar with gas appliances. It requires a wall-mounted setup and adequate venting, which might necessitate professional installation, adding to the cost. The warranty coverage, while decent with a 1-year labor and 5-year parts warranty, might be considered lacking compared to competitors that offer longer terms.

Another point to consider is that the heater's weight (about 59.9 pounds) and size (17.7”W x 23.7”H) may pose challenges during installation, especially in tighter spaces. It’s essential to ensure that your home can accommodate this unit before purchasing.

The Rheem RTGH-95DVLN-3 is a robust option for families seeking efficient hot water solutions. Its high flow rate and energy efficiency make it a strong contender in the tankless water heater market, but potential buyers should weigh the installation requirements and warranty duration against their specific needs.

The Rheem RTGH Series 8.4 GPM tankless water heater is a robust option for households seeking an efficient and high-capacity water heating solution. With a maximum flow rate of 8.4 gallons per minute, it is capable of handling the hot water needs of multiple fixtures simultaneously, making it suitable for larger families or homes with high hot water demand. Its energy efficiency rating of 0.93 ensures that it converts a significant portion of its fuel into heat, helping to reduce energy bills over time. The unit operates on natural gas and requires a 120-volt power source for its electric ignition, combining the efficiency of gas heating with the reliability of electric controls.

Measuring 17.7 inches in width and 23.7 inches in height, the unit is relatively compact, though it does require wall mounting, which might be a consideration during installation. The temperature settings can be adjusted between 100 and 140 degrees Fahrenheit, with a default setting of 120 degrees Fahrenheit, providing flexibility to meet different hot water needs. It comes with a solid warranty package, including 1 year for labor, 15 years for the heat exchanger, and 5 years for parts, which speaks to the manufacturer's confidence in the product's durability.

On the downside, at nearly 60 pounds, it is a bit heavy, which might pose a challenge during installation. Additionally, while it ranks #94 in water heaters, this model is a reliable and efficient choice for those who need a powerful and flexible water heating solution but should be prepared for the installation requirements.

The Stiebel Eltron Tempra 24 Plus is a solid choice for those in need of an electric tankless water heater suitable for whole-house applications. Its continuous flow technology ensures that you'll have an uninterrupted supply of hot water, which is a significant advantage for larger households or those with high hot water demands. The unit is compact and energy-efficient, featuring a design that doesn't require venting, which makes it a great option if space is limited. The energy savings monitor is a nice addition, allowing you to track your energy costs effectively.

One of the key strengths of the Tempra 24 Plus is its advanced flow control, which helps maintain consistent water temperatures even when multiple outlets are in use. This is particularly beneficial during peak usage times. The digital temperature display and preset memory buttons make it user-friendly, even for individuals who might not be tech-savvy.

However, there are a few drawbacks to consider. The unit requires a minimum electric service of 150 A, which may be a limitation for homes with older electrical systems. Installation might be tricky for DIY enthusiasts, as it typically requires a professional to handle the electric setup. Additionally, while the unit operates quietly, some users might find that the slight reduction in flow during high demand could be a minor inconvenience. The warranty provided, including a 7-Year Leakage and 3-Year Parts Warranty, adds a layer of confidence in its reliability. The Stiebel Eltron Tempra 24 Plus is a well-rounded option for those prioritizing efficiency and continuous hot water, though it's best suited for households ready for potential electrical upgrades.