Rinnai RSC199eN Tankless Water Heater Review Smart-Circ Efficiency Uncovered

  • Smart-Circ technology anticipates hot water needs by learning usage patterns, cutting down wait times and saving energy.
  • Compact design fits easily in tight outdoor spaces, roughly the size of a small suitcase, freeing up valuable room.
  • Delivers an impressive flow rate of up to 11 gallons per minute, capable of supplying hot water to multiple fixtures simultaneously.
  • Built for durability with a 15-year warranty on the heat exchanger, offering long-term reliability and peace of mind.
Last updated on June 1, 2025 7:39 am Details
SKU: B09YB9L99M Category:

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Description

Compact and Smart Design That Fits Anywhere

Using the Rinnai RSC199eN Smart-Circ Condensing Gas Tankless Water Heater has been quite the experience. Its compact size, roughly the footprint of a small suitcase, instantly caught my attention. This is a huge advantage, especially if you’re tight on space but still want a high-capacity water heater. The outdoor installation model means no venting hassles inside the house, which I found convenient. Mounting it on the wall was straightforward, though I strongly recommend professional installation to ensure everything runs smoothly and safely—this unit packs 199,000 BTUs, and you want it done right.

The gray finish looks sleek, blending well with outdoor setups without being an eyesore. I appreciated how it doesn’t eat into valuable real estate like traditional bulky water heaters. Plus, the durability factor is a win here; no rusty sediment buildup like tank heaters, which means a longer lifespan. The design seems thoughtfully engineered for modern homes, especially those wanting to reclaim space.

Smart-Circ Technology: A Game-Changer for Energy Efficiency

One standout feature of this product is the Smart-Circ Intelligent Recirculation system. The heater actually learns your hot water usage patterns. I found it fascinating how it anticipates when I’d need hot water and starts circulating accordingly. This resulted in noticeably shorter waits for hot water at the tap, which is something I didn’t expect with an outdoor unit. The technology also saves energy by not circulating water unnecessarily during off-peak times.

I tested this with varying schedules, and the system adapted well, improving comfort without spiking energy bills. The Wi-Fi readiness is another highlight, though it requires purchasing the control-r® module separately. Once connected, remote operation and monitoring are possible, which adds a cool convenience layer for tech-savvy homeowners.

Powerful Performance for Multiple Fixtures

Delivering up to 11 gallons per minute, this tankless water heater can supply hot water to about seven fixtures simultaneously. This capacity impressed me, especially during busy mornings when showers, dishwashing, and laundry coincide. The continuous hot water flow means no interruptions—a definite improvement over conventional tank heaters that run out of hot water and need time to refill.

The unit’s 199,000 BTU heat output ensures rapid heating, even in colder climates, though performance can vary based on your region’s ground water temperature. It’s ENERGY STAR qualified with a Uniform Energy Factor of 0.111, so you’re not just getting power but efficiency as well. Running it outdoors keeps indoor air quality unaffected by combustion gases, another safety and comfort plus.

Perks of Smart Features and Warranty Coverage

This product is packed with smart and durable features. Besides Smart-Circ and Wi-Fi readiness, it comes with a solid warranty: 15 years on the heat exchanger, 5 years on labor, and 1 year on parts. That’s a reassuring safety net if anything goes wrong. The included valves and professional-grade components speak to the overall quality.

I noticed how the heater’s control settings allow for fine-tuning temperature and pump schedules, giving flexibility to suit different household needs. The absence of required batteries adds to the convenience, eliminating the hassle of replacements. Overall, the tech integration makes this water heater feel futuristic but practical.

  • Smart-Circ technology reduces wait times and saves energy
  • High flow rate supports multiple fixtures simultaneously
  • Compact size frees up valuable space
  • Strong warranty coverage offers peace of mind

Areas for Improvement in User Experience

Despite many positives, the unit isn’t without flaws. Installation complexity is a significant hurdle. I wouldn’t try self-installing this one due to its high BTU and gas connections; a professional is a must. The Wi-Fi module is sold separately, which feels like a missed opportunity since smart control is a big selling point these days.

Some users might find the price point on the higher end for outdoor tankless heaters, especially when factoring in installation and optional add-ons. The heater’s efficiency could dip in extremely cold climates, so checking local water temperatures is necessary before committing. Also, the weight of nearly 68 pounds means handling and mounting require some muscle or help.

  • Requires professional installation for safety and optimal performance
  • Wi-Fi control module not included, adding extra cost
  • Performance can vary depending on ground water temperature
  • Heavier than some competing units, making installation tougher

Product Comparisons: How It Stands Against Rivals

Comparing this smart tankless heater to other popular models like the Noritz NRC661-DV-NG or Takagi T-KJr2-IN-NG reveals some interesting contrasts. The Rinnai offers superior Smart-Circ circulation technology, which I found more intuitive and energy-saving than the basic recirculation systems on some competitors. Its compact footprint also beats many bulkier alternatives.

However, some rivals boast slightly higher flow rates or come with built-in Wi-Fi controls, eliminating that separate purchase hassle. The warranty on Rinnai’s heat exchanger is impressive but similar to other top-tier brands. Where this unit shines is in balancing energy efficiency, compact design, and smart tech, making it ideal for homeowners who value these features.

Price Worthiness: Is It Worth the Investment?

Given the advanced features and build quality, the price to quality ratio of this water heater is reasonable but not budget-friendly. You’re paying for cutting-edge technology, like Smart-Circ and Wi-Fi readiness, plus a hefty BTU output capable of handling large households. The savings on energy bills combined with the space-saving design add value that might justify the initial investment.

For those who prioritize long-term savings, consistent hot water supply, and smart home integration, this product offers a compelling package. However, if your needs are simpler or budget tighter, more basic tankless options might suffice. Factoring in installation costs and optional modules is essential to assess overall value.

User Feedback Highlights and Considerations

Feedback from other users aligns with my experience: many praise the energy efficiency and compact design, while some express frustration over the separate Wi-Fi module and installation demands. Reviews often highlight how the system’s learning feature genuinely cuts down wait times for hot water, making daily routines smoother.

On the downside, a few users reported occasional fluctuations in water temperature during peak usage, which could be a limitation depending on household demand. The outdoor placement, while convenient for venting, may pose challenges in extreme weather unless properly shielded.

Overall, this heater fits well in homes looking for a high-efficiency, smart, compact, and reliable hot water solution with some upfront investment and professional help.

The Rinnai RSC199eN tankless water heater offers a blend of smart technology and robust performance that’s hard to beat in its class. Its Smart-Circ feature, powerful heat output, and compact design make it a standout choice for those seeking energy-efficient, on-demand hot water without sacrificing space or convenience. However, the need for professional installation and additional Wi-Fi components, along with its weight and price, are factors worth weighing carefully.

Additional information

Brand

‎Rinnai

Product Dimensions

‎9"W x 9"H

Special Feature

‎Smart-Circ™, Wi-Fi Ready

Color

‎Gray

Wattage

‎19000 watts

Voltage

‎120 Volts

Heat Output

‎199000 British Thermal Units

Efficiency

‎High Efficiency

Style

‎Natural Gas, Outdoor Installation

Mounting Type

‎Wall

Is Electric

‎Yes

Manufacturer

‎Rinnai

UPC

‎766156016899

Part Number

‎RSC199eN

Item Weight

‎67.9 pounds

Item model number

‎RSC199eN

Item Package Quantity

‎1

Special Features

‎Smart-Circ™, Wi-Fi Ready

Included Components

‎Water Heater, Valves

Batteries Required

‎No

Date First Available

April 19, 2022

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