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Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation

4.5 4.5 out of 5 stars 623 ratings

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Rebates starting at $600 available from energy providers for 20149. Terms apply. See rebates
Natural Gas, Indoor Installation
Water Heater
11 GPM

Purchase options and add-ons

Brand Rinnai
Product Dimensions 9"W x 9"H
Color Silver/Grey
Voltage 120 Volts
Capacity
11 Gallons
Power Source
Gas Powered
Item Weight
74.1 Pounds
Style
Natural Gas, Indoor Installation

About this item

  • Endless Hot Water: Our tankless hot water heaters offer unlimited whole-home hot water flow and come equipped with Circ-Logic for pairing with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation
  • Energy and Space Efficient: The tankless design of this small hot water heater saves on space and conserves energy as it heats only when necessary
  • Optimal Water Pressure: With a hot water flow rate of up to 11 GPM, this tankless water heater provides a powerful, constant stream that can accommodate up to 7 appliances at once
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your water heater; We do not recommend installing a water heater without a technician
  • Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively; Wifi monitoring available with Controlr module (not included)
  • ENERGY STAR qualified with Uniform Energy Factor of 0.105
See more product details

Customer ratings by feature

Temperature Control
4.6 4.6
Comfort
4.4 4.4
Value for money
4.4 4.4
Easy to install
4.3 4.3

Frequently bought together

$1,384.11
Ships from and sold by Amazon.com.
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$59.98
Get it as soon as Wednesday, Mar 27
In Stock
Sold by Watertech Plumbing Supply and ships from Amazon Fulfillment.
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Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation
Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation
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Price-29% $1,384.11
List:$1,954.74
-10% $1,167.39
List:$1,297.10
$1,966.00$1,369.62$1,680.21$1,369.62
Delivery
Get it as soon as Wednesday, Mar 27
Get it as soon as Thursday, Mar 28
Get it as soon as Wednesday, Mar 27
Get it as soon as Wednesday, Mar 27
Customer Ratings
Temperature Control
4.6
4.3
4.6
5.0
5.0
Easy to install
4.3
4.1
4.4
4.6
3.3
Tech Support
3.9
3.5
4.7
4.0
Sold By
Amazon.com
Amazon.com
Big Frog Supply
Amazon.com
Amazon.com
Amazon.com
capacity
11 gallons
7.6 gallons
11 gallons
9 gallons
11 gallons
9 gallons
power source
Gas Powered
Gas Powered
Battery Powered
Battery Powered
Battery Powered
Battery Powered
heat output
199000 btus
199000 btus
199000 btus
style
Natural Gas, Indoor Installation
RE199iN Natural Gas
Natural Gas, Indoor Installation
Natural Gas, Indoor Installation
Propane, Indoor Installation
Propane, Indoor Installation
weight
74.1 pounds
52.1 pounds
35.8 kilograms
35.4 kilograms

From the manufacturer

Rinnai
tankless heater

constant hot water

lasts twice as long

rinnai

Never run out of hot water again

With Rinnai, hot water is always available to you, no matter how much or how often you need it

Smarter, more durable than a tank

Rinnai tankless water heaters last up to twice as long, and save energy-heating water only when needed

The Rinnai difference

Individually tested for quality before shipping, Rinnai makes the vast majority of our key components, unlike our competitors, allowing for better, more consistent quality

energy efficient

recirculation technology

space saving design

Enjoy energy saving benefits

Rated by a Uniform Energy Factor (UEF), our tankless water heaters are highly energy efficient, saving you from expensive power and water costs

Recirculation benefits

Hot water is always ready. Our ThermaCirc360 technology can offer faster hot water through an external pump (sold separately)

Saves valuable space

Our suitcase-sized compact wall units fit neatly in, freeing up more usable areas in your home

rinnai RINNAI B010Q1XD1U rinnai rinnai rinnai
RE-Models REP-Models RUCS-Models RU-Models RSC Models CU-Models
Customer Reviews
4.4 out of 5 stars
52
4.4 out of 5 stars
52
3.9 out of 5 stars
48
4.8 out of 5 stars
18
4.4 out of 5 stars
49
4.0 out of 5 stars
47
Energy Star Qualified X X X
Available in Natural Gas or Propane
Indoor and outdoor versions available Indoor Only
Quick Access Isolation X X
GPM's-Gallons Per Minute 2.7-7.6 GPM 3.1-7.6 GPM 6.5-7.5 GPM 7-11 GPM 9-11 GPM 9-11 GPM
# of Fixtures Supported 2 to 6 2 to 6 2 to 6 2 to 7 2 to 7 3 to 7
Built-in Recirculation Pump X X X X
WiFi Capable (Module Sold Separately) X
Learns Hot Water Usage Patterns for Convenience and Energy Savings X X X X

Looking for specific info?

Product information

Technical Details

Additional Information

Warranty & Support

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Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation


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From the brand

Product guides and documents

Product Description

The Rinnai Super High-Efficiency Plus Tankless Water Heater is the ultimate solution for energy-conscious homeowners seeking a smart, compact, and efficient water heating system. This tankless hot water heater offers advanced features and a durable design that provides an endless supply of hot water, making it perfect for households of all sizes. Enjoy unlimited hot water flow throughout your home, as well as a compact and space-saving design that conserves energy by heating water only when necessary, providing optimal energy efficiency. With a high-performance 11 GPM hot water flow rate, this tankless gas water heater delivers powerful and constant water pressure for a satisfying and uninterrupted stream. Say goodbye to low water pressure and enjoy a powerful hot water experience. Equipped with Circ-Logic technology, this on demand water heater enables recirculation patterns that coincide with your typical habits. Pair it with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation. Rest assured with our Super High-Efficiency Plus Tankless Water Heater, backed by a guaranteed warranty. Enjoy a 15-year residential warranty for the heat exchanger, 5-year warranty for labor, and 1-year warranty for parts. For added convenience, Wi-Fi monitoring is available with the Controlr module (not included), allowing you to monitor and control your water heater from anywhere. Rinnai's super high-efficiency plus condensing tankless water heater models, featuring SENSEI technology, offer the most advanced technology in water heating. Unlike traditional tank heaters that accumulate rusty sediments, our compact water heater elements have a longer lifespan as water runs continuously through the pipes.

WARNING:

CHOKING HAZARD -- Small parts. Not for children under 3 yrs.

Important information

Bulb Voltage

120 volts

Customer reviews

4.5 out of 5 stars
4.5 out of 5
623 global ratings

Customers say

Customers like the value, noise, temperature and ease of installation of the water heater. For example, they mention it's worth the money, easy to install with clear instructions and that it'll provide endless hot water. They appreciate the energy efficiency, saying the savings are well worth the wait. Customers also appreciate performance, and quality.

AI-generated from the text of customer reviews

69 customers mention50 positive19 negative

Customers like the temperature of the water heater. They say it provides endless hot water, works well, and is quiet. Some customers also mention that the water is available when they need it and that the exhaust gases are not even hot. Overall, customers are satisfied with the temperature and recommend it as the best tankless hot water heater they have had.

"...One of the most commendable features of the Rinnai RU199iN? Stable hot water output. Not once did I experience any hot water fluctuations during use...." Read more

"...Endless hot water! Really cool." Read more

"...The unit provides an excellent continuous source of hot water...." Read more

"...very quiet, and seems to have plenty of hot water flow." Read more

49 customers mention41 positive8 negative

Customers like the performance of the water heater. They mention that it works well as expected, it's easy to install, and it works right out of the box. Some say that the product has had zero issues after 9 months of continuous use and that the hot water never stops.

"...No further occurrences of errors. Works fine with furnace running even supplied through a 1/2in tee from a 1 in main supply to the basement...." Read more

"installed easily and worked right out of the box and it came with all the extra shut off valves and pop offs at no extra charge" Read more

"...It's a great unit, works really well, did'nt cost that much more than a gas tank water heater and can power 3 showers and clothes washer and dish..." Read more

"Like very much, it's a tankless. Water heater works wonderful." Read more

48 customers mention42 positive6 negative

Customers find the installation of the water heater to be easy with clear instructions. They also say the unit is easy to maintain and that it pairs functionality with ease of use.

"...If what you're after is a top-notch appliance that couples functionality with ease of use, then the Rinnai RU199iN certainly fits the bill...." Read more

"installed easily and worked right out of the box and it came with all the extra shut off valves and pop offs at no extra charge" Read more

"...Took me a weekend to get it up and running. Instructions were invaluable." Read more

"...The instructions were excellent, and there are many YouTube videos that provide useful tips.Operational experience:..." Read more

28 customers mention20 positive8 negative

Customers like the quality of the water heater. They mention it's an energy-saving unit, impressive, and well-designed. Customers also say that the reputation of the product is very good.

"...It's a great unit, works really well, did'nt cost that much more than a gas tank water heater and can power 3 showers and clothes washer and dish..." Read more

"...the unit to check for transit damage—no issues—and the build quality looked excellent...." Read more

"2yr ownership update: Aside from one breakdown due to a faulty part (which was immediately shipped by the manufacturer under warranty) this heater..." Read more

"...Haven’t had a hot water flow problem at all. Pretty impressive." Read more

17 customers mention14 positive3 negative

Customers like the value of the water heater. They mention that it's worth the money, the parts are inexpensive, and it'll save them space. Some mention that there are hidden costs with the purchase, but overall, customers are happy with their purchase and recommend it to others.

"...More efficient and endless hot water. Very nice product, best on the market. Glad I got the 11gpm as my ground water is cold." Read more

"...that the exhaust vent just uses standard Schedule 40 PVC, which is super cheap and easy to work with...." Read more

"...They're pretty inexpensive parts, and very easy to access using just 3 screws...." Read more

"...Both tasks are easy to do and well worth the benefits of this heater." Read more

14 customers mention14 positive0 negative

Customers are satisfied with the energy efficiency of the water heater. They mention that it's a high-efficiency, condensing unit, and the exhaust is warm. The energy savings are well worth the wait, and they can tell that the power bill is definitely lower. The water heater delivers consistent performance, minimal noise, and solid dependability. The gas bill went down significantly, and it hasn't missed a beat.

"...It's like the ninja of water heaters - quiet and incredibly efficient in performance...." Read more

"...More efficient and endless hot water. Very nice product, best on the market. Glad I got the 11gpm as my ground water is cold." Read more

"...This unit is even better and more efficient with a secondary condensing heat exchanger...." Read more

"I like the unit that is very efficient." Read more

13 customers mention13 positive0 negative

Customers find the water heater extremely quiet, with good volume on the water. They also say it's the most inaudible gas appliance they have ever owned.

"...I am shocked at how well this thing works. I am still amazed how quiet it is. No further occurrences of errors...." Read more

"...very quiet, and seems to have plenty of hot water flow." Read more

"...by trade and these are a lot of fun to pipe up and running it, is amazingly quiet...." Read more

"...It is quiet and does exactly what we bought it for..." Read more

8 customers mention8 positive0 negative

Customers are satisfied with the size of the water heater. They mention that it takes up much less space than a conventional water heater, and is very compact.

"...Takes up way less space in basement. Highly recommend!" Read more

"...The procedure there is very simple.Otherwise, this is a very compact, very attractive unit...." Read more

"Great product , never run out of hot water. Space saver and economical to run." Read more

"...The benefits are definitely being noticed. Small footprint (much more room in my storage area now), unlimited hot water --- can't say how much..." Read more

Great product, heats nice and efficiently
5 Stars
Great product, heats nice and efficiently
Takes a second to get going but thats the trade off to a tank, the rest is all positives. More efficient and endless hot water. Very nice product, best on the market. Glad I got the 11gpm as my ground water is cold.
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Top reviews from the United States

Reviewed in the United States on August 2, 2023
Style: Natural Gas, Indoor InstallationPattern Name: Water HeaterSize: 11 GPMVerified Purchase
Customer image
5.0 out of 5 stars High-Performance & Hassle-free - Rinnai RU199iN Delivers!
Reviewed in the United States on August 2, 2023
October 2023 - The takeaway is that anyone who complains about these not working well did not install it correctly (and won't admit it). I am shocked at how well this thing works. I am still amazed how quiet it is. No further occurrences of errors. Works fine with furnace running even supplied through a 1/2in tee from a 1 in main supply to the basement.

Sep 2023 Brief update: I had one occurrence of error 12 - flame out. But it hasn't happened again. I hope it was a fluke caused by our gas supply and nothing else. If not, I'll investigate and update my review afterward.

Original review Aug 2023: My recent experience with the Rinnai RU199iN tankless hot water heater has, in a single word, been excellent! It's like the ninja of water heaters - quiet and incredibly efficient in performance.

Getting it up and running was straightforward, similar to the typical expectations of setting up the necessary plumbing, gas, venting, and electrical work. However, it's important to note that this isn't like replacing a conventional tank where everything falls into place easily. Rather, it is like a fitting jigsaw puzzle into place, not easy per se, but not too daunting either. The most fun was renting a rotary hammer from Home Depot to bore the vent holes though brick.

For anyone worried about gas lines like me, you may appreciate this little surprise. The unit appears to have an internal gas booster pump. Ingenious, right? I chose to run it off of an existing gas line which was originally fed from a 1-inch line from the meter, with a brief downgrade to a 1/2 inch, before returning to a 3/4 inch. Despite my initial concern, it seems to function flawlessly under these conditions. But I am not complacent, and plan to eventually test all my gas appliances together in full throttle, just to be certain that the supply line capacity holds up.

One of the most commendable features of the Rinnai RU199iN? Stable hot water output. Not once did I experience any hot water fluctuations during use. An absolute win! However, I did notice a slightly longer delay to get hot water on a cold startup, taking approximately 10 to 15 seconds longer compared to traditional heaters. But once it gets going, it provides steady, continuous hot water supply.

Oh, and I must add - I did the installation myself. So, for all the DIY enthusiasts out there, this little project is quite manageable and rewarding.

In conclusion, the Rinnai RU199iN tankless hot water heater has proven to be a stellar addition to my home. It delivers consistent performance, minimal noise, and solid dependability. If what you're after is a top-notch appliance that couples functionality with ease of use, then the Rinnai RU199iN certainly fits the bill. Five stars for this one, without a second thought!
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32 people found this helpful
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Reviewed in the United States on February 15, 2024
Style: Natural Gas, Indoor InstallationPattern Name: Water HeaterSize: 11 GPMVerified Purchase
2 people found this helpful
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Reviewed in the United States on February 20, 2024
Style: Natural Gas, Indoor InstallationPattern Name: Water HeaterSize: 11 GPMVerified Purchase
Reviewed in the United States on November 18, 2023
Style: Natural Gas, Indoor InstallationPattern Name: Water HeaterSize: 11 GPMVerified Purchase
Customer image
5.0 out of 5 stars Super High Quality, Easy to Install!
Reviewed in the United States on November 18, 2023
I bougbt this to replace a traditional tank water heater. This should last twice as slong plus got a $750 energy tax credit on next years tax return. I highly recommend the condensing type because you can vent it with regular 2 in PVC, whereas the non condensing type is less efficient and requires very expensive double wall vent pipe. With the tax credit this ended up only slightly more than a big tank and this will supply up to 4 showers at the same time, and ENDLESS! Takes up way less space in basement. Highly recommend!
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3 people found this helpful
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Reviewed in the United States on March 4, 2024
Style: Propane, Indoor InstallationPattern Name: Water HeaterSize: 11 GPMVerified Purchase
Reviewed in the United States on March 10, 2024
Style: Propane, Indoor InstallationPattern Name: Water HeaterSize: 11 GPMVerified Purchase
Customer image
5.0 out of 5 stars Great product, heats nice and efficiently
Reviewed in the United States on March 10, 2024
Takes a second to get going but thats the trade off to a tank, the rest is all positives. More efficient and endless hot water. Very nice product, best on the market. Glad I got the 11gpm as my ground water is cold.
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One person found this helpful
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Reviewed in the United States on December 29, 2023
Style: Natural Gas, Indoor InstallationPattern Name: Water HeaterSize: 11 GPMVerified Purchase
9 people found this helpful
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Reviewed in the United States on February 9, 2024
Style: Propane, Indoor InstallationPattern Name: Water HeaterSize: 11 GPMVerified Purchase
2 people found this helpful
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Top reviews from other countries

Bryan taylor
5.0 out of 5 stars Excellent Unit
Reviewed in Canada on January 24, 2023
Style: Propane, Indoor InstallationPattern Name: Water HeaterSize: 9 GPMVerified Purchase
Sean G
5.0 out of 5 stars As described
Reviewed in Canada on September 21, 2022
Style: Natural Gas, Indoor InstallationPattern Name: Water HeaterSize: 7 GPMVerified Purchase
Amazon Customer
5.0 out of 5 stars Works very well and is super quiet
Reviewed in Canada on May 2, 2022
Style: Propane, Indoor InstallationPattern Name: Water HeaterSize: 7 GPMVerified Purchase
Mihai
5.0 out of 5 stars It is one of the best instant water heater.
Reviewed in Canada on June 29, 2020
Style: Propane, Indoor InstallationPattern Name: Water HeaterSize: 9 GPMVerified Purchase
5 people found this helpful
Report
Amazon.ca Customer
5.0 out of 5 stars Wow, nice product, easy to install. This product is worth the money!
Reviewed in Canada on June 6, 2020
Style: Natural Gas, Indoor InstallationPattern Name: Water HeaterSize: 11 GPMVerified Purchase
3 people found this helpful
Report