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.

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.

The Rinnai RX160iN tankless water heater is a solid choice if you want a compact and efficient unit that can serve multiple fixtures at once. It offers a high flow rate of up to 9 gallons per minute, which means it can comfortably supply hot water to about six taps simultaneously — great for larger households or homes with higher hot water demands. Its energy efficiency is excellent, with a UEF rating of 0.97, helping you save on energy bills compared to traditional water heaters.