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 compact dimensions (17.63”W x 18.25”H x 3.5”D) and wall-mount design make it space-efficient and ideal for small utility areas, while the digital temperature display and ON/OFF dial control provide ease of use and precise temperature adjustments. Additionally, the self-modulating power control enhances efficiency by only using the necessary amount of power based on the water flow rate.

However, the temperature rise might be limited during peak usage in colder climates, potentially requiring additional units for larger homes. Potential buyers should consider the installation requirements and whether their household electrical setup can support the unit. Those looking for a reliable, energy-efficient, and continuous hot water supply will find the Rheem RTEX-24 a compelling option, especially in moderate climates and homes with appropriate electrical infrastructure.

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 FOGATTI Natural Gas Tankless Water Heater is designed for outdoor use and offers powerful performance with a maximum flow rate of 8.1 gallons per minute, suitable for supplying hot water to about 3 to 5 outlets simultaneously. Running on natural gas and producing 180,000 BTU, it provides instant hot water without the wait, making it ideal for continuous hot water needs for showers, sinks, or appliances. Its compact size (about 17 x 26 inches) and relatively lightweight design simplify installation, and it performs well even if water pressure is low.

This heater features precise temperature control, maintaining water temperature steady within a 1-degree range, which helps avoid sudden and uncomfortable temperature changes. It is built to last outdoors with safety features like a bottom-mounted fan to prevent smoke backflow and a robust heat exchanger made of oxygen-free copper, enhancing durability. Because it is an outdoor unit, it includes an anti-freeze device but still requires draining if left unused in freezing temperatures below 5°F to prevent damage. The maximum temperature is capped at 140°F, which is standard but may feel less hot to some users.

The heater requires a natural gas connection and a standard 120V power supply. Maintenance is generally straightforward, but periodic checks and servicing are recommended to ensure efficient and safe operation. Backed by a 2-year full warranty and 5 years on the heat exchanger, along with CSA certification, it serves as a reliable and energy-efficient choice for those seeking an outdoor tankless water heater capable of serving multiple hot water points without the bulk of a traditional tank.