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 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.

One of its standout features is its high energy efficiency, boasting a UEF of .97, which means it can help save on energy costs while ensuring top performance. Additionally, the compact size makes installation easier, especially in smaller spaces, though it is recommended to have a professional handle the installation to avoid complications. However, the WiFi control module for remote access isn't included, which could be a downside for users looking for smart home integration.

The heater’s design balances modern aesthetics with functionality, including easy-to-use controls and a Quick Flush feature for maintenance. These factors combined make the Rinnai RX130iN an excellent choice for those needing a reliable, energy-efficient, and versatile gas water heater, although the requirement for professional installation might be a minor inconvenience for some users.

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.