10 Best Tankless Water Heaters 2025 in the United States

The Rinnai RX199iN is a robust tankless water heater that is designed for both indoor and outdoor installation, offering flexibility in its setup. With a flow rate of up to 11.1 gallons per minute, it effectively supports multiple fixtures simultaneously, making it a great choice for larger households or those with high hot water demands. Its high energy efficiency rating of UEF .98 means you can expect notable savings on energy bills over time, which is especially beneficial for eco-conscious users.

This model is powered by either natural gas or propane, catering to various fuel types, which adds to its versatility. The compact design, similar to a small suitcase, helps save space in your home, a feature that many customers find appealing.

Professional installation is recommended, which could add to the cost and effort involved in setting it up. While the Rinnai Central App offers support for setup and troubleshooting, the WiFi control module is sold separately, which might be an inconvenience for users looking for a fully integrated smart home solution. Potential buyers should evaluate their specific hot water needs against the maximum temperature output of 140 degrees Fahrenheit. The warranty and support options are also crucial to consider, as they ensure peace of mind and assistance should any issues arise.

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-95DVELN-3 is a tankless water heater designed for indoor use with natural gas, offering a maximum flow rate of 9.5 gallons per minute, which is suitable for a large household with multiple simultaneous hot water applications. Its super high efficiency (efficiency rating of 0.93) ensures that energy costs are kept low, as the unit only operates when hot water is needed.

The built-in EcoNet Wi-Fi technology allows for easy customization and monitoring of settings, including temperature and recirculation, from your phone, adding a modern touch to its usability. Another notable feature is the LeakGuard Leak Detection and Prevention system, which offers peace of mind by protecting your home from potential water damage due to leaks. The unit's hot-start programming prevents the uncomfortable cold-water bursts often associated with tankless systems, ensuring a continuous hot water supply.

With dimensions of 17.7 inches in width and 23.7 inches in height, the compact size allows for flexible installation options, although some users may still find installation challenging due to the weight of 51.3 pounds. The maximum temperature of 140 Degrees Fahrenheit is adequate for most residential needs. This unit could be particularly beneficial for individuals looking for a reliable, efficient, and advanced tankless water heating solution for their home.