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 RE199eN Non-Condensing Natural Gas Tankless Water Heater offers a strong flow rate of up to 9.8 GPM, making it suitable for larger households needing multiple fixtures operating simultaneously. Its energy-efficient design, which heats water only when necessary, helps conserve energy and reduce utility bills. This model uses natural gas, making it a cost-effective choice for many homes.

The compact size, comparable to a small suitcase, allows for flexible installation options, especially for outdoor setups, freeing up indoor space. The heater provides a substantial temperature rise, meaning it can effectively handle cold water inflows and deliver hot water consistently. Additionally, the LED display simplifies monitoring and diagnostics by showing service reminders and error codes promptly.

On the downside, the product requires professional installation, potentially adding to the initial cost. Another consideration is its non-condensing nature, which might make it slightly less efficient compared to condensing models. However, the warranty is robust, offering 15 years on the heat exchanger, 5 years on parts, and 1 year on labor, providing peace of mind. The absence of WiFi control in the base model is a minor drawback, although an upgrade is available. This water heater is ideal for those looking for a durable, high-flow tankless solution and who are ready to invest in professional installation for optimal performance.

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.