Rinnai SENSEI™ RU199iN Super High Efficiency Plus Tankless Gas Water Heater



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AHRI Certified

AHRI Number:10595469

Suggested Retail $2,473.00 Your Low Price Special Price $1,854.74
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With the Rinnai SENSEI Super High Efficiency Plus condensing tankless water heater, your family can enjoy an endless supply of hot water. Compact, easy to install and perfect for any indoor location.


  • Energy Factor: 0.96 / Uniform Energy Factor: 0.93
  • 15,000 BTU (minimum) / 199,000 BTU (maximum)
  • Product dimensions: 18.5"W x 27.9"H x 12"D
  • Uniform Energy Factor(UEF): 93
  • Wi-Fi Capable: Yes
  • Continuous Water for Multiple Applications
  • Energy Efficient
  • Circ-Logic Recirculation Technology
  • Enhanced Combustion Design
  • Stainless Steel Heat Exchanger
  • Flexible Venting Options
  • Simple Installation and Serviceability
  • Energy Star Qualified
  • Safety Devices - Flame Failure - Flame Rod, Boiling Protection, Combustion Fan RPM Check, Over Current - Glass Fuse, Remaining Flame (OHS) and Automatic Frost Protection
  • Exhaust Venting: Top Vent

Additional Features

  • Mobile Home Certified
  • Complies with South Coast Air Quality Management
  • Ultra Low NOx
  • Tankless Rack System™ Compatible
  • 1/2 in. (13 mm) Gas Line Compatible

The Rinnai SENSEI series tankless water heater provides a simpler installation, easier maintenance, higher efficiency, and better safety precautions for an overall superior experience over previous generations of tankless water heaters.

Product Specifications

More Information
Rinnai SENSEI™ RU199iN Super High Efficiency Plus Tankless Gas Water Heater
Weight (in lbs) 64.000000
AHRI Certificate Number 10595469
Manufacturer Rinnai
Included Items Tankless Water Heater, Wall Mounting Bracket, Pressure Relief Valve and Adapter, Isolation Valve Kit, Vent Screens (x2), Vent Screen Screws (x2) and Self-Tapping Screws (x2)
Additional Information Average of 9.8 GPM
Furnace Efficiency / AFUE 93%
Heating BTU 199,000
Exhaust Pipe 2"
Venting Type Vented
Energy Star Yes
Electrical 120 V. 1 Phase 60 Hz
Low NOx Ultra Low NOx
Ignition Type Electronic ignition
Fuel Type Natural Gas, Gas
Certification AHRI, ANSI Z21.10.3, CSA 4.3, and Energy Star®
Height 26.4"
Width 18.5"
Depth 11.4"
Warranty Heat Exchanger: 15 years or 12,000 operation hours, whichever occurs first. All Other Parts and Components: 5 Years
Resources You will need Adobe® Acrobat® Reader to view PDF documents
Safety Information PROPOSITION 65 WARNING


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Questions and Answers

Customer Questions
Can this RU199iN unit be installed outside?
This unit, the RU199iN, is designed to be installed in an indoor environment. Rinnai also offers the RU199eN which is the same unit but it has been designed and tested to work in an external environment. If you have any further questions we recommend that you give us a call. Thanks!
Can this be fueled using propane?
This can only be fueled by natural gas. A conversion kit would be needed for this run on propane. If you have any further questions, please call us and we will be happy to assist you.
Can this heat 140 degree water to 160 degrees?
This Rinnai unit can heat up to a maximum of 120° by default but with parameters adjustments, per the manual of the RU199iN, you can reach up to a maximum of 140°. If you have any further questions we recommend that you give us a call. Thanks!
What is the minimum flow rate for this unit?
The minimum to maximum flow rate will be 0.26 - 9.8 GPM (1.0 - 37 L/min) for the RU199iN, if you have any further questions about this unit we recommend that you give us a call. Thanks!
It was not getting hot and this unit was showing a code 12?
When a code 12 occurs with the Rinnai RU199iN it is indicating that a flame failure has occurred on the system. There are a few reasons that this may be happening. Such as, loose gas connections and fittings, debris and dirt clogging in the fan blower and gas burner, moisture in the tubing that connects the gas combustion chamber to the valve, or incorrect gas pressure supply for your hot water unit. If you have any further questions we recommend that you give us a call. Thanks!
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