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10 Best Rinnai Tankless 2026 in the United States
#1
Winner
NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU, with Recirculation Pump
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.
Rating
10.0
Chosen by1,424
Energy Efficiency
Fuel Type
Size and Installation
Most important from
329 reviews
#2
Rinnai CXP199iN High Efficiency Plus Natural Gas Interior Tankless Water Heater, 11 GPM
The Rinnai CXP199iN is a high-efficiency tankless water heater designed for both indoor and outdoor installation, making it versatile for different settings. It boasts a high flow rate of 11 GPM, which is sufficient to handle multiple hot water needs simultaneously. The energy efficiency is impressive at 97%, ensuring lower operational costs over time. The unit uses natural gas but can also be powered by propane, thanks to its Smart Sense gas control system, offering flexibility based on fuel availability.
#3
NEW Rinnai RX130iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 7.1 GPM, 130,000 BTU
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.
Rating
7.6
Flow Rate (GPM)
Energy Efficiency
Temperature Rise
Most important from
329 reviews
Top 10 Best Rinnai Tankless 2026 in the United States
#1
Winner
NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU, with Recirculation Pump
NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU, with Recirculation Pump
Flow Rate (GPM): 11.1
Energy Efficiency: 98%
Fuel Type: natural gas or propane
Size and Installation: 19"W x 31"H, Wall mount
Chosen by 1424 this week
Rinnai CXP199iN High Efficiency Plus Natural Gas Interior Tankless Water Heater, 11 GPM
Rinnai CXP199iN High Efficiency Plus Natural Gas Interior Tankless Water Heater, 11 GPM
Flow Rate (GPM): 11 GPM
Energy Efficiency: 97%
Fuel Type: Natural gas, Propane
Size and Installation: 18.5"W x 30.11"H, Wall mount
Warranty and Support: Solid
NEW Rinnai RX130iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 7.1 GPM, 130,000 BTU
NEW Rinnai RX130iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 7.1 GPM, 130,000 BTU
Flow Rate (GPM): 7.1 Gallons Per Minute
Energy Efficiency: UEF rating 0.97
Fuel Type: Natural gas and propane
Temperature Rise: Max 140 Degrees Fahrenheit
Size and Installation: 19"W x 31"H; wall mount
Rinnai CX199iN Condensing Smart Sense Commercial Natural Gas or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Rinnai CX199iN Condensing Smart Sense Commercial Natural Gas or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Flow Rate (GPM): 11.1
Energy Efficiency: 96%
Fuel Type: Natural Gas or Propane
Size and Installation: 18.5"W x 30.11"H, Wall-mounted
NEW Rinnai RXP160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU, with Recirculation Pump
NEW Rinnai RXP160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU, with Recirculation Pump
Flow Rate (GPM): 9 gallons per minute
Energy Efficiency: 0.97
Fuel Type: natural gas or propane
Size and Installation: 19"W x 31"H; indoor/outdoor install
Warranty and Support: app and qualified installer network
Related Products
Up to 16% off
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU
Flow Rate (GPM): 11.1
Energy Efficiency: .98 UEF
Fuel Type: Natural gas or propane
Size and Installation: 18.5"W x 30.11"H, Wall
NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU
NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU
Flow Rate (GPM): 9 gallons per minute
Energy Efficiency: 0.97
Fuel Type: natural gas or propane
Size and Installation: 19"W x 31"H, wall mount
Warranty and Support: good support and warranty
Rinnai RUS75eN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Outdoor Installation
Rinnai RUS75eN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Outdoor Installation
Flow Rate (GPM): 7.5 gallons per minute
Energy Efficiency: High
Fuel Type: Natural gas
Size and Installation: 33"W x 37"H, outdoor, wall mount
Warranty and Support: Heat exchanger 12 yrs, parts 5 yrs
Rinnai RU180iN Condensing Tankless Hot Water Heater, 10 GPM, Natural Gas, Indoor Installation
Rinnai RU180iN Condensing Tankless Hot Water Heater, 10 GPM, Natural Gas, Indoor Installation
Flow Rate (GPM): 10 gallons per minute
Energy Efficiency: ENERGY STAR, Efficiency 0.101 UEF
Fuel Type: Natural gas
Size and Installation: 14.76"W x 33.86"H, wall-mounted
Warranty and Support: Heat exchanger 15 years; limited labor
#10
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Buying Guide for the Best Rinnai Tankless
Choosing the right Rinnai tankless water heater can significantly improve your home's hot water efficiency and save you money in the long run. Tankless water heaters provide hot water on demand, which means you won't run out of hot water and you won't waste energy keeping a large tank of water hot all the time. To find the best fit for your needs, it's important to understand the key specifications and how they relate to your household's requirements.Flow Rate (GPM)Flow rate, measured in gallons per minute (GPM), indicates how much hot water the unit can produce at a given time. This is crucial because it determines whether the heater can meet your household's hot water demands. For example, a flow rate of 3-5 GPM is suitable for small households with one or two bathrooms, while larger homes with multiple bathrooms and high hot water usage may require a flow rate of 7-10 GPM or more. To choose the right flow rate, consider the number of people in your home and the number of hot water fixtures that may be used simultaneously.
Energy EfficiencyEnergy efficiency is a measure of how effectively the water heater converts energy into hot water. This is often represented by the unit's Energy Factor (EF) or Uniform Energy Factor (UEF). Higher values indicate better efficiency, meaning the unit uses less energy to heat the water. This is important for reducing your energy bills and environmental impact. Look for models with high EF or UEF ratings if energy efficiency is a priority for you. For most users, a unit with an EF or UEF of 0.8 or higher is considered efficient.
Fuel TypeRinnai tankless water heaters can be powered by natural gas, propane, or electricity. The fuel type affects installation costs, operating costs, and performance. Natural gas and propane models typically offer higher flow rates and are more cost-effective to operate compared to electric models. However, electric models can be easier to install and may be a better option if you don't have access to gas lines. Choose the fuel type based on your home's existing infrastructure and your preferences for installation and operating costs.
Temperature RiseTemperature rise refers to the increase in water temperature that the unit can achieve. This is important because it determines how hot the water will be when it reaches your fixtures. The required temperature rise depends on the incoming water temperature and the desired output temperature. For example, if your incoming water is 50°F and you want it to be 120°F, you need a unit that can provide a 70°F temperature rise. Consider your local climate and typical incoming water temperature when choosing a unit with the appropriate temperature rise capability.
Size and InstallationThe physical size of the tankless water heater and its installation requirements are important factors to consider. Tankless units are generally more compact than traditional tank heaters, but you still need to ensure you have enough space for installation. Additionally, some models may require specific venting or electrical connections. Make sure to check the installation requirements and consult with a professional if needed to ensure the unit can be installed in your desired location. Choose a size that fits your space and meets the installation criteria for your home.
Warranty and SupportThe warranty and support offered by the manufacturer can provide peace of mind and protect your investment. A longer warranty period typically indicates the manufacturer's confidence in the product's durability and reliability. Look for models with comprehensive warranties that cover both parts and labor. Additionally, consider the availability of customer support and service options in your area. Choose a unit with a strong warranty and reliable support to ensure you can get help if any issues arise.