10 Best Gas Water Heaters 2025 in the United States

The Ranein Natural Gas Tankless Water Heater offers a solid choice for households looking for continuous hot water without the wait. It delivers up to 4.3 gallons per minute with a strong 100,000 BTU heating power, which is enough to supply hot water to 2-3 spots like a bathroom, kitchen, or bar. Since it is tankless, it heats water instantly, so you won’t have to wait for a tank to fill up and warm. This model includes a vent pipe, which is convenient and saves you the extra cost of buying one separately. The heater is designed to adjust water temperature automatically based on the season, which can help maintain comfort and efficiency year-round.

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 RX130iN offers impressive versatility and convenience, making it suitable for various installation environments—both indoor and outdoor—thanks to its Versa Vent feature. It can operate on either propane or natural gas, providing flexibility depending on your fuel availability. With a flow rate of up to 7.1 GPM, it ensures you never run out of hot water, easily supporting multiple fixtures simultaneously, which is ideal for larger households or demanding applications.