Customer Reviews

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







100% of 100
Availability: In Stock - Ready to Ship

Authorized Rinnai Dealer

AHRI Certified

AHRI Number:10595469

Suggested Retail $2,473.00 Your Low Price Special Price $1,854.74
Accessories for this product
Call 1-800-397-1392 for Best Pricing
Customer Reviews
BBB Rating
Best Pricing


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 Number10595469
Included ItemsTankless 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 InformationAverage of 9.8 GPM
Furnace Efficiency / AFUE 93%
Heating BTU199,000
Exhaust Pipe2"
Energy StarYes
Electrical120 V. 1 Phase 60 Hz
Low NOxUltra Low NOx
Ignition TypeElectronic ignition
Fuel TypeNatural Gas
CertificationAHRI, ANSI Z21.10.3, CSA 4.3, and Energy Star®
WarrantyHeat 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 InformationPROPOSITION 65 WARNING

Reviews 2

Write Your Own Review
You're reviewing:Rinnai SENSEI™ RU199iN Super High Efficiency Plus Tankless Gas Water Heater
Your Rating

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!
Does this unit include an internal pump?
Rinnai tankless water heaters have built-in pumps with Smart-Circ™ Intelligent Recirculation™ that learns your schedule. No dedicated return line, no problem. A thermal by-pass valve added to the cold water line helps ensure recirculation is enabled, and your unit takes it from there. If you have any further questions please feel free to give us a call! Thanks.
Do you sell the Rinnai recirculation device for under the last sink on the line?
We currently do not have it at this current time but are looking to stock it in the near future.If you have any further questions please feel free to give us a call! Thanks.
Did you find what you were looking for?


Our mission is simple: To provide an open HVAC marketplace online, offering the best HVAC brands directly to the public, based on real, affordable prices. For too long, local dealers have charged whatever they could get away with - but now YOU HAVE A CHOICE.


Choose us for:

  • Real recommendations on only what you need (no upsells)
  • Real wholesale prices, never inflated
  • Real advice & tech support from experts in home heating & cooling
Money Icon


We sell products at wholesale pricing. No markups, no hidden fees. Our average customer saves BETWEEN THREE TO SIX THOUSAND DOLLARS
-That's the Direct Advantage!

Best Brands


Just because a brand is nationally known, doesn't mean it's the best. Our HVAC technicians have hand-selected the most efficient and durable products for American homeowners, giving you exactly what you need at the best pricing.



We choose products with long, best-in-the-market warranties by manufacturers with great customer service and solid reputations. This gives you peace of mind that you'll be getting a great quality product.

Huge Savings
Read about a real life example from one of our
customers who saved thousand.

We've helped over 100,000 American homeowners and earned their trust.

See What Our Customers are Saying