10 Best Gas Water Heaters 2025 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.

Additionally, its Smart-Circ Intelligent Recirculation technology enhances efficiency by learning your water usage patterns, which helps in reducing wait times for hot water and conserving energy. The water heater boasts a super-high energy efficiency factor (UEF) of .98, making it a cost-effective option in the long run. The inclusion of WiFi connectivity (via the Control-R module, sold separately) allows for remote control and monitoring, adding modern convenience.

On the downside, professional installation is recommended, which could incur additional costs. The unit's high heat output of 199,000 BTU and maximum pressure of 150 PSI signify robust performance, but it might be overkill for smaller households. This water heater is ideal for larger households needing a dependable and efficient hot water solution, provided that the cost and complexity of installation are not deterrents.

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.

One of the notable features of this model is its large capacity, suitable for commercial use, which means it can efficiently handle high water demand situations. The vent size of 6 provides flexibility in installation, although professional installation might be necessary given the product's substantial size and weight.

Potential buyers should be aware of its significant dimensions (30.25"W x 72"H) and heavy weight (629 pounds), which could pose challenges in smaller spaces and require reinforced flooring. This unit is designed for floor mounting, which might limit placement options in certain settings. Its cream color may not suit all aesthetic preferences if it's in an exposed area. Additionally, while it ranks high in energy efficiency, the warranty is limited to three years, which might be a consideration for those looking for long-term security.

The AO Smith BTR-200 is ideal for commercial settings or large households with high hot water demands, valuing efficiency and reliability over compactness and ease of installation. Careful consideration of installation needs and space requirements is advised.

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 Smart Sense gas control system allows it to operate with either natural gas or propane, adding to its flexibility. The Quick Flush feature makes maintenance easier, potentially extending the unit's lifespan. However, the WiFi control feature is optional and not included, which could be a downside for those who prefer smart home integration. Professional installation is recommended, which might add to the upfront cost.

The unit's compact size (19"W x 31"H) is a plus for those with limited space but be mindful of the weight (54 pounds) during installation. It's essential to consult a professional to ensure it's the right fit for your home’s ground water temperature and specific needs. This water heater is a solid choice for those seeking an efficient, high-capacity solution, but be prepared for the potential additional costs of professional installation and optional accessories.