10 Best Tankless Water Heaters 2025 in the United States

The Rinnai RXP199iN Condensing Smart Sense Tankless Water Heater offers impressive versatility, operating with either natural gas or propane and being suitable for both indoor and outdoor installations. With a flow rate of up to 11.1 GPM, it can handle multiple fixtures at once, making it ideal for larger households. Its compact size and modern design, which includes features like Quick Flush and Smart-Circ Intelligent Recirculation, enhance its efficiency and user-friendliness.

Additionally, the unit boasts a high energy efficiency factor of 0.98, translating to significant energy savings. The option for WiFi connectivity through the Control-R module adds to its smart appeal, although this module is not included with the water heater. Installation should be performed by a professional, which adds to the initial cost but ensures proper setup and operation. The unit's temperature rise and maximum output of 199,000 BTU make it suitable for demanding environments, but users should ensure their home’s infrastructure supports this capacity.

The warranty and support are implied to be robust through Rinnai's recommendation for professional installation and their central app for service and troubleshooting. This tankless water heater is best suited for those needing a high-performance, energy-efficient solution for a large household.

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 a solid choice for those looking for an efficient way to get instant hot water for multiple sources in their home. With a high flow rate of up to 8.1 gallons per minute (GPM) and a heating capability of 180,000 BTU, it can easily meet the demands of a large family. One of its standout features is its outdoor installation, which saves space indoors and is equipped with a remote control panel for convenient indoor operation.

Its ability to operate in various weather conditions, thanks to a powerful DC fan, is a plus for those living in areas with harsh weather. The compact size also makes it easier to install without taking up too much space on your wall. The system boasts an energy efficiency rating of over 0.81, making it an energy-saving option, and it comes with CSA certification, ensuring its safety standards. Furthermore, the precise temperature control ensures that the water temperature remains consistent, which is particularly useful for households with varying water needs.

On the downside, it requires natural gas, so it’s crucial to have access to this fuel type. Also, while the installation is marketed as easy, it might still require professional help due to the involvement of gas lines and specific fittings. Despite these considerations, the product comes with a reassuring 2-year warranty for the entire unit and a 5-year warranty for the heat exchanger, which speaks to its durability. The FOGATTI tankless water heater is well-suited for large families looking for a reliable and efficient source of hot water with the convenience of outdoor installation and remote operation.