10 Best Tankless Gas Water Heaters 2025 in the United States

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 Rheem RTG-70DVLN-3 is an indoor tankless natural gas water heater designed to deliver continuous hot water with a maximum flow rate of 7 gallons per minute. This capacity allows it to support multiple simultaneous water uses, such as running a shower and dishwasher together, making it suitable for medium to larger households. It features an energy efficiency rating of 0.82, helping reduce gas consumption by heating water only when needed, which can lower energy bills. The unit includes hot-start programming to prevent cold water bursts, enhancing user comfort.

The Ranein Natural Gas Tankless Water Heater is a compact and efficient option for providing instant hot water to your home. With a flow rate of 4.3 gallons per minute (GPM) and a heating capacity of 100,000 BTU, it can comfortably supply hot water to multiple points in your home, such as your bathroom, kitchen, and bar area. This makes it a suitable choice for households with moderate hot water needs. One of its standout features is the Four Seasons Function, which automatically adjusts the water temperature based on the season, ensuring consistent performance year-round.