10 Best Tankless Water Heaters 2025 in the United States

The EcoSmart ECO 11 is a compact electric tankless water heater designed primarily for small-scale or point-of-use applications like a bathroom sink or office breakroom. It delivers a flow rate between 1.3 and 3.1 gallons per minute, which means it can provide steady hot water for low-flow needs but might struggle with larger demands such as multiple full bathrooms running simultaneously. The patented self-modulating technology keeps water temperature consistent within 1 degree, which is great for comfort and energy savings. Speaking of energy, this unit is quite efficient, converting 99% of electricity into heat and only heating water when you need it, helping reduce your utility bills compared to traditional tank heaters. Installation is flexible because of its small size—about 11.5 by 8 by 3.75 inches—and wall-mount design, saving space and making it ideal for tight areas. It operates at 240 volts and requires a 54-amp electrical draw, so your home's electrical system must support this.

Maintenance needs are minimal thanks to the electric operation and durable components, backed by a lifetime warranty on key parts. This model’s maximum temperature is 140°F and it’s not designed for whole-home use in larger households. For those seeking a simple, efficient solution for a small water heating point, the EcoSmart ECO 11 serves as a solid choice, though bigger homes may want to consider more powerful models.

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 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.