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 RX199iN is a versatile tankless water heater that can be powered by natural gas or propane and installed indoors or outdoors. With a maximum flow rate of up to 11.1 gallons per minute, it can support multiple fixtures simultaneously, which is ideal for families or homes with high hot water demands. Its compact design, roughly the size of a small suitcase, makes it easier to install in various spaces without taking up too much room.

One of its standout features is its energy efficiency, boasting a UEF rating of .98, which means it can help save on utility bills while providing hot water on demand. The Smart Sense gas control system enhances user convenience, but keep in mind that it requires professional installation, which might be an additional cost for homeowners.

The quick flush feature simplifies maintenance, which is a plus for users who may not have much experience with water heaters. However, the reliance on professional installation could deter DIY enthusiasts or those looking to save on installation costs. The WiFi control is available but requires an additional module, which may not appeal to everyone. The Rinnai RX199iN is a solid choice for households seeking a reliable and efficient tankless water heater.

The Rinnai RU199iN Condensing Tankless Hot Water Heater is a high-performing unit designed for indoor installation with natural gas. It boasts an impressive maximum flow rate of 11 gallons per minute (GPM), making it suitable for homes with high hot water demands, capable of powering multiple appliances simultaneously.

One of its standout features is the Circ-Logic technology, which works with an external pump to provide on-demand or scheduled hot water recirculation, significantly reducing wait times for hot water. This makes it an excellent choice for large households or those with multiple bathrooms and heavy hot water usage. The unit is also ENERGY STAR certified, reflecting its energy efficiency, which can lead to cost savings on utility bills since it heats water only when necessary.

This tankless design also saves space compared to traditional water heaters. However, installation requires professional assistance, as noted by the recommendation to find a qualified Rinnai technician, which might add to the initial setup cost. Additionally, while the product is backed by a robust warranty (15 years for the heat exchanger, 5 years for parts, and 1 year for labor), the need for regular maintenance and potential repair costs could be a consideration. The unit's size and weight (74.1 pounds) mean that it requires a solid mounting setup. The Rinnai RU199iN is well-suited for users looking for a reliable, energy-efficient, and high-capacity tankless water heater, provided they are ready to invest in professional installation and regular maintenance.