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.

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.

The Rinnai RX130iN tankless water heater is a versatile and efficient choice for those looking for a reliable hot water supply without the bulk of a traditional tank. It offers a solid flow rate of up to 7.1 gallons per minute, which means it can comfortably handle up to four fixtures running at the same time for a typical family’s needs. Its energy efficiency is impressive, with a Uniform Energy Factor (UEF) of 0.97, helping to keep your energy costs down while being environmentally friendly. This model runs on either natural gas or propane, giving you flexibility depending on what fuel source you have available.