Rinnai RX199iN Tankless Water Heater Review High Efficiency Indoor Outdoor Gas Model

Description

Highlights of the Rinnai RX199iN Tankless Water Heater

Testing the Rinnai RX199iN has been quite an experience. This compact unit, roughly the size of a small suitcase, delivers an impressive maximum flow rate of 11.1 gallons per minute, which means it can run about seven fixtures simultaneously without a noticeable dip in temperature. The Smart Sense gas control system, which allows the unit to operate on either natural gas or propane, really impressed me. This flexibility is a big plus, especially for households where fuel type availability might change or where propane is preferred for efficiency. The Versa Vent system makes installation indoors or outdoors straightforward, a feature I appreciated during setup in my garage.

The energy efficiency rating (UEF .98) stands out as one of the best I’ve seen in tankless water heaters. It’s clear that this device is designed not only to perform but to save on energy bills in the long run. The interface is surprisingly user-friendly, which is a relief because some of these units can be overly complicated. The Quick Flush feature is a thoughtful addition, simplifying maintenance by making it easier to clear out sediment build-up, which extends the unit’s life. I found this particularly useful since traditional tank heaters often accumulate rust and sediment over time, leading to early replacements.

Drawbacks to Keep in Mind

Despite its many strengths, the tankless heater has some limitations that potential users should consider. First, the price point is on the higher end compared to some competitors, which might make it less attractive for budget-conscious buyers. While the energy savings justify the investment over time, the upfront cost is still something to factor in. Also, the installation procedure isn’t exactly a DIY project; professional installation is strongly recommended, adding to the total cost. I tried to get a friend to handle it, but the technicalities of venting and gas connections were beyond their comfort zone.

Another issue is the lack of Wi-Fi control out of the box. You have to purchase the Control-R module separately to unlock the smart connectivity features. This extra step felt like a missed opportunity since many modern appliances come with integrated smart controls. This module allows for remote monitoring and adjustments, which I imagine would be handy, but it’s an additional expense that some might find frustrating.

Versatility in Installation and Use

One of the standout features of this unit is its convertibility. Thanks to the Versa Vent, installation indoors or outdoors is possible with minimal adjustments. I installed mine in a somewhat unconventional spot where space was tight, and the compact dimensions of 18.5″ wide by 30.11″ high made it fit like a glove. The fact that it can operate on either propane or natural gas provides flexibility that not many tankless water heaters offer. This adaptability is perfect for households in transition or those that want to keep options open for fuel sources.

The mounting system is wall-based, which saves precious floor space, and the device’s light weight (about 55 pounds) made it manageable to handle during installation. I also appreciated how quiet it runs, which contrasts with some older models I’ve tested that sound like mini jet engines.

User Experience and Interface

The control panel is refreshingly simple, featuring basic buttons and a clear display that quickly tells you the temperature and status. It’s a relief to have a water heater that doesn’t require a PhD to operate or troubleshoot. The Quick Flush function deserves another mention here because it makes regular maintenance less of a chore. I ran the flush a couple of times, and it truly simplified keeping the unit clean—no disassembling or complicated processes.

My family noticed the difference in hot water availability immediately. Showers stay hot even when multiple taps are running, and the temperature remains consistent, which is something a lot of tankless heaters struggle with. The maximum temperature of 140 degrees Fahrenheit offers enough heat for all household needs without worrying about scalding, thanks to the precise control system.

Price Performance Considerations

Comparing the price-performance ratio of this model to others on the market, I found it offers great value for money if you’re looking for durability, energy efficiency, and flexibility in fuel type. However, if you’re on a strict budget or have a smaller household, the higher flow rate and advanced features might be more than you actually need. The long lifespan and energy savings do help justify the cost, but those benefits really shine in medium to large homes with higher hot water demands.

The fact that it is Energy Star qualified means that it meets or exceeds industry standards for efficiency, which will help offset the initial investment over time. I’d say this unit is a solid choice for those who want a smart, efficient, and versatile water heater without sacrificing performance.

Peer Products and Market Rivals

In comparison with other tankless water heaters like the Noritz NRC66DVNG or the Takagi T-KJr2-IN-NG, this model holds its own in several key areas. The Rinnai RX199iN’s ability to switch between propane and natural gas easily is a feature not all competitors offer, making it more adaptable. Its maximum flow rate of 11.1 GPM is superior to many rivals, which often hover around 6 to 9 GPM, making it better suited for larger homes.

On the downside, some competitors come with integrated Wi-Fi control, while this unit requires an add-on module. Installation complexity is similar across high-end models, so the recommendation for professional setup is standard. The noise level on this Rinnai heater is noticeably lower, which is a bonus for those sensitive to appliance sounds.

Positive Features Worth Noting

• Highly energy-efficient with UEF .98 rating, helping reduce utility bills significantly.
• Versatile fuel options: runs on natural gas or propane.
• Compact and wall-mounted design saves space.
• Quick Flush function for easy maintenance.
• Supports up to 7 fixtures simultaneously with 11.1 GPM flow rate.

Areas of Concern

• Requires professional installation, adding to initial costs.
• Wi-Fi control module sold separately, not included.
• Higher upfront cost compared to some less feature-rich models.
• Not ideal for very small households due to high flow capacity.

Testing this unit has shown me that it’s a solid performer with a lot of thoughtful features designed to meet the demands of modern households. The balance between efficiency, flexibility, and user-friendly design makes it a dependable choice, though it definitely comes with some financial and setup considerations.

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