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 RE180iP is a propane-fueled, non-condensing tankless water heater designed for indoor installation. It offers a substantial flow rate of up to 8.5 GPM, making it suitable for homes with high hot water demand as it can support up to five fixtures simultaneously. Its compact size (14.05"W x 27.24"H) makes it a good fit for tight spaces, and it includes an LED display for user-friendly operation. The unit is designed for high efficiency, which is a plus for energy conservation and cost savings over time. However, it's worth noting that professional installation is recommended, which could add to the overall cost if you don't have the expertise to install it yourself.

The heater comes with a robust warranty: 15 years for the heat exchanger, 5 years for labor, and 1 year for parts, offering peace of mind for long-term usage. One potential downside is the lack of included WiFi control, which requires a separate Controlr module if you want to monitor and control the heater remotely. Additionally, given its non-condensing design, it might not be as energy-efficient as condensing models, particularly in colder climates where the temperature rise requirement is higher.

This product is well-suited for larger households that need a reliable and efficient hot water supply.