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 V75IN Tankless Hot Water Heater is designed for indoor installation, using natural gas to provide a high flow rate of up to 7.5 gallons per minute (GPM). This flow rate is robust enough to serve multiple appliances simultaneously, making it suitable for households with significant hot water demands. Its energy efficiency is commendable, with an energy factor of 0.82, meaning it conserves energy by only heating water when needed. This efficiency is coupled with enhanced scale detection to protect the unit and extend its lifespan.

Installation is recommended to be performed by a professional to ensure optimal performance and safety, which might be a consideration for those preferring DIY installations. The unit is compact, measuring 30 inches in width and 13 inches in height, which saves space and allows for easy wall mounting. Temperature control ranges from 98ºF to 140ºF, offering flexibility depending on your preference.

The heater is backed by a solid warranty: 10 years for the heat exchanger, 5 years for labor, and 1 year for parts, providing peace of mind to users. While its efficient performance and durability are strengths, potential drawbacks include the need for professional installation and higher initial costs associated with tankless systems. This product suits users looking for a reliable and efficient solution to meet their hot water needs without occupying much space.