10 Best Rinnai Tankless 2025 in the United States

The Rinnai RXP199iN is a versatile tankless water heater suitable for both indoor and outdoor installations, thanks to its adaptable Versa Vent system. With the capacity to deliver up to 11.1 gallons per minute, it can efficiently supply hot water to multiple fixtures simultaneously, making it ideal for larger households or small businesses. Powered by natural gas or propane, this model offers flexibility in fuel options, and its high energy efficiency of 98% helps minimize utility costs.

A standout feature is the Smart-Circ Intelligent Recirculation system, which optimizes water heating based on your usage habits, enhancing both convenience and energy conservation. The Smart Sense gas control system further ensures safe and efficient operations. However, utilizing the full potential of this heater requires additional purchases, like the Control-R module for WiFi connectivity, which is not included. This device allows for remote control and monitoring, adding a layer of convenience for tech-savvy users.

Installation is recommended to be handled by professionals to ensure safety and optimal functionality, and Rinnai provides resources to locate qualified technicians. While the product's compact size makes it easy to fit in various spaces, its installation complexity might be a consideration for those seeking a straightforward setup. With a maximum temperature of 140 degrees Fahrenheit and robust performance at 199,000 BTUs, the Rinnai RXP199iN is designed for high-demand settings. Though the initial investment might be higher compared to some competitors—given the need for professional installation and additional accessories—the long-term savings on energy bills and the continuous hot water supply could justify the cost for many users.

The Rinnai RX180iN is a versatile tankless water heater that works with either natural gas or propane, giving you flexibility depending on your fuel source. It delivers a strong flow rate of up to 10 gallons per minute, which means it can handle hot water for multiple fixtures at once, like showers and taps, making it suitable for medium to larger homes. Its energy efficiency is excellent, with a UEF of 0.98, helping to reduce energy bills compared to traditional water heaters.

The unit has a compact size roughly like a small suitcase and can be installed indoors or outdoors with the proper venting, offering installation flexibility. Professional installation is recommended due to the complexity of setup and venting requirements. It features a user-friendly interface and a smart gas control system that helps maintain consistent water temperature up to 140°F, which is plenty hot for everyday needs. The heater is also designed for easy maintenance with features like a Quick Flush system. While it doesn’t include WiFi control by default, it is compatible with an optional module for remote monitoring.

Weighing 54 pounds, it mounts on a wall, saving floor space. Customers rate it highly, reflecting reliability and performance. If you want an energy-efficient, high-capacity tankless water heater with flexible fuel and installation options, the Rinnai RX180iN is an excellent choice. Be prepared for professional installation and to check local codes for outdoor setups.

The Rinnai RX130iN is a versatile tankless water heater compatible with both natural gas and propane, making it suitable for various home setups. It delivers up to 7.1 gallons per minute, comfortably supplying hot water to around four fixtures simultaneously, which is ideal for medium to larger households. This unit boasts excellent energy efficiency with a UEF rating of 0.97, helping reduce energy bills while providing steady hot water. Its compact size, roughly that of a small suitcase, allows for flexible installation indoors or outdoors when paired with the appropriate venting accessories.

Professional installation is recommended to ensure safety and proper setup, which may increase initial costs. The heater features a simple interface and a quick flush option to make maintenance easier. While WiFi control is available, it requires purchasing an additional accessory. With a maximum water temperature of 140°F and a sturdy design, the RX130iN is suitable for homes in various climates.

For those seeking a reliable and efficient tankless water heater with flexible fuel usage and installation options, the RX130iN presents a compelling choice. Prospective buyers should consider the need for professional installation and the optional cost for smart features.