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.

The Rinnai REP199eP is a propane-fueled tankless water heater designed for outdoor installation. It offers a strong flow rate of up to 7.9 gallons per minute, which is enough to supply hot water to multiple fixtures simultaneously, making it a good choice for medium to larger households. Its Smart-Circ technology includes a built-in recirculation pump that learns your water use patterns to provide hot water quickly while saving energy. With an efficiency of about 85%, it performs well in conserving fuel compared to older models, though it’s not the highest efficiency available in condensing units. The unit is compact, roughly the size of a small suitcase, which allows it to fit in limited outdoor spaces. It supports a maximum temperature of 140°F, which is typical for home use.

The Rinnai RX160iN is a versatile tankless water heater that works with natural gas or propane and can be installed indoors or outdoors, making it a great fit for various home setups. It delivers up to 9 gallons per minute, which is enough to supply hot water to multiple fixtures at once—ideal for medium to large households. The heater is compact, about the size of a small suitcase, so it won’t take up much space.