---
product_id: 73516429
title: "Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation"
brand: "rinnai"
price: "€ 998.15"
currency: EUR
in_stock: false
reviews_count: 13
url: https://www.desertcart.hr/products/73516429-rinnai-ru199in-condensing-tankless-hot-water-heater-11-gpm-natural
store_origin: HR
region: Croatia
---

# Energy Star certified efficiency Wi-Fi monitoring ready 11 GPM powerful flow Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation

**Brand:** rinnai
**Price:** € 998.15
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Upgrade to endless hot water and energy savings—because your home deserves the best!

## Quick Answers

- **What is this?** Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation by rinnai
- **How much does it cost?** € 998.15 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/73516429-rinnai-ru199in-condensing-tankless-hot-water-heater-11-gpm-natural)

## Best For

- rinnai enthusiasts

## Why This Product

- Trusted rinnai brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Space-Savvy Design:** Compact wall-mounted unit frees up valuable space—perfect for modern, minimalist homes.
- • **Smart Energy Savings:** Only heats water on demand, slashing energy waste and shrinking your utility bills.
- • **Endless Hot Water Flow:** Never run out with a robust 11 gallons per minute capacity powering up to 7 appliances simultaneously.
- • **Reliable & Long-Lasting:** Backed by a 15-year heat exchanger warranty and professional installation support for peace of mind.
- • **Circ-Logic Recirculation:** Cut wait times with intelligent scheduling and on-demand hot water recirculation when paired with an external pump.

## Overview

The Rinnai RU199iN is a high-efficiency, natural gas-powered tankless water heater delivering up to 11 gallons per minute of continuous hot water. Designed for indoor installation, it features Circ-Logic technology for smart recirculation, ENERGY STAR certification for energy savings, and a compact wall-mounted design. With a 15-year heat exchanger warranty and optional Wi-Fi monitoring, it’s engineered for durability, convenience, and modern living.

## 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.

Review: High-Performance & Hassle-free - Rinnai RU199iN Delivers! - 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!
Review: First tankless, great choice for us - First tankless with new build. Very happy after six months. Tankless is definitely the way to go. Plenty of continuous hot water and lower natural gas bill. Takes up less space in garage. Rinnai appears to be high quality. Friends recommended and say the same, trouble free. Highly recommend.

## Features

- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07CW426QZ |
| Best Sellers Rank | #636,934 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #626 in Water Heaters |
| Brand | Rinnai |
| Brand Name | Rinnai |
| Capacity | 11 gallons |
| Color | Silver/Grey |
| Customer Reviews | 4.4 out of 5 stars 388 Reviews |
| Efficiency | Low |
| Flow Rate | 11 gpm |
| Global Trade Identification Number | 00766156009532 |
| Included Components | Water Heater |
| Item Depth | 11.45 in / (290 mm) |
| Item Dimensions W x H | 9"W x 9"H |
| Item Type Name | Water Heaters |
| Item Weight | 74.1 pounds |
| Manufacturer | Rinnai |
| Manufacturer Part Number | RU199iN |
| Manufacturer Warranty Description | Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts) |
| Material Type | Metal |
| Maximum Pressure | 60 psi |
| Model Number | RU199iN |
| Mount Type | Wall |
| Number of Items | 1 |
| Power Source | Gas Powered |
| Product Dimensions | 9"W x 9"H |
| Special Feature | High-efficiency, ENERGY STAR certified, Circ-Logic technology for recirculation |
| Special Features | High-efficiency, ENERGY STAR certified, Circ-Logic technology for recirculation |
| Style Name | Natural Gas, Indoor Installation |
| UPC | 766156009532 |
| Unit Count | 35.27 Ounce |
| Voltage | 120 volts |
| Wattage | 57942.2 watts |

## Product Details

- **Brand:** Rinnai
- **Capacity:** 11 gallons
- **Power Source:** Gas Powered
- **Product Dimensions:** 9"W x 9"H
- **Special Feature:** High-efficiency, ENERGY STAR certified, Circ-Logic technology for recirculation

## Images

![Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation - Image 1](https://m.media-amazon.com/images/I/61uJabmAAUL.jpg)
![Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation - Image 2](https://m.media-amazon.com/images/I/712bkI7cvxL.jpg)
![Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation - Image 3](https://m.media-amazon.com/images/I/71GhP2mLeSL.jpg)
![Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation - Image 4](https://m.media-amazon.com/images/I/71nILu4NlNL.jpg)
![Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation - Image 5](https://m.media-amazon.com/images/I/71DteCsyXZL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: Is this unit supposed to have a tiny drip? We have this installed in our garage and there is a small nozzle that drips when the unit is being used.**
A: Yes, this unit is a condensing water heater and the drip is called condensate and should be safely disposed of. It was explained to me like this- the chemical reactions in burning natural gas produce some harmful chemical byproducts and water. In less efficient devices, the hot exhaust boils the water into vapor and the byproducts and water vapor blow out the exhaust to the outside. However, this product is very efficient and extracts so much heat from the burning that the exhaust isn't hot enough to fully vaporize the water which condenses in the device (along with some of the chemical byproducts) and drips from the device's condensate drain. This condensate (containing some of the chemical byproducts) is mildly acidic and should be disposed of safely as it can slowly eat away at concrete and other things over long periods.

**Q: Can you use a fresh air intake or is it only indoor air intake?**
A: You can use both, the units come with a vent plastic grate for indoor air venting, however, outdoor fresh air intake is recommended when possible.

**Q: which brand is the most quiet?**
A: The RU199in, from my experience, has been the quietest 199,000 BTU tankless heater I have heard, but I certainly have not heard all of them. 

Most review sites do cite how quiet the unit is. You can probably YouTube this question and hear it running in some reviews.

**Q: What recirculation pump will work with this heater?**
A: rinnai recommends the GTK03 Grundfos kit for this unit

## Customer Reviews

### ⭐⭐⭐⭐⭐ High-Performance & Hassle-free - Rinnai RU199iN Delivers!
*by R***R 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!

### ⭐⭐⭐⭐⭐ First tankless, great choice for us
*by B***4 on April 7, 2025*

First tankless with new build. Very happy after six months. Tankless is definitely the way to go. Plenty of continuous hot water and lower natural gas bill. Takes up less space in garage. Rinnai appears to be high quality. Friends recommended and say the same, trouble free. Highly recommend.

### ⭐⭐⭐⭐⭐ Missing pieces
*by R***D on May 2, 2020*

Seems like a good product. Was disappointed to find I was missing the union fitting for BOTH isolation valve upon arrival, as if it hadn't been packaged. Consequently had to reschedule all work for switch over to be done until after I get a hold of manufacturer. Looking forward to getting this running and will update my review at such time. Edit: After contacting rinnai, they sent me out the missing valves, albeit begrudgingly. The unit fired right up and I noticed no difference in time to receive hot water at fixtures. VERY quiet. The most inaudible gas appliance I have ever owned. Instructions were clear and very descriptive.

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---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-23*