10 Best Tankless Gas Water Heaters 2026 in the United States

The Rinnai RXP199iN tankless water heater offers a notable blend of versatility and efficiency. Its capacity to deliver up to 11.1 GPM makes it suitable for households with high hot water demands, potentially serving up to seven fixtures simultaneously. This high flow rate, coupled with a substantial 199,000 BTU rating, ensures a consistent supply of hot water even during peak usage times. The energy efficiency factor (UEF) of .98 indicates the unit is highly efficient, contributing to lower energy bills over time and making it an eco-friendly choice.

The Rheem RTGH-95DVLN-3 is a strong contender in the tankless gas water heater category. With a flow rate of up to 9.5 gallons per minute (GPM) and a BTU rating of 199,900, it’s capable of supplying hot water for multiple outlets simultaneously, making it ideal for larger households. Its energy efficiency rating of 0.93 means you can expect decent savings on energy bills, which is a big plus for budget-conscious consumers. Additionally, the unit features an integrated digital display that allows for easy temperature adjustments, ranging from 100 to 140°F, catering to various user preferences.

The Rinnai RX160iN is a versatile tankless gas water heater suitable for both indoor and outdoor use, thanks to its Versa Vent system. It runs on natural gas or propane, offering flexibility depending on your fuel source. With a maximum flow rate of 9 gallons per minute, it can comfortably supply hot water to around six fixtures simultaneously, making it a good fit for medium to larger households. The unit boasts a strong 160,000 BTU rating, which supports a high temperature rise, so you can expect consistent hot water even in colder climates or when multiple taps are in use.