10 Best Gas Water Heaters 2026 in the United States

The Rinnai RXP199iN Condensing Smart Sense Tankless Water Heater is designed for versatile installation, functioning both indoors and outdoors. Its dual compatibility with propane and natural gas (thanks to the Smart Sense gas control system) makes it a flexible choice. With a high flow rate of up to 11.1 GPM, it can handle multiple fixtures simultaneously, ensuring a continuous supply of hot water. The compact size, comparable to a small suitcase, is convenient for homes with limited space.

The Rinnai RX160iN is a versatile and compact tankless water heater that can be installed either indoors or outdoors, making it a flexible option for various home setups. It has a high energy efficiency factor of 0.97, which means it can help save on energy costs over time. The water heater offers a maximum flow rate of 9 gallons per minute (GPM), allowing it to handle multiple fixtures at once, so you shouldn't run out of hot water during peak usage times. This is ideal for larger households or those with higher hot water demands.

The AO Smith BTR-200 Tank Type Water Heater stands out in the gas water heater category primarily due to its high energy efficiency and robust construction. Its ability to meet or exceed thermal efficiency and standby loss requirements ensures that it operates effectively, reducing energy consumption and saving on utility bills. Additionally, the electronic ignition feature simplifies the startup process, making it convenient to use. The heater is CSA certified and ASME rated, indicating a level of safety and quality that users can trust.