Rinnai RXP199iN Condensing SmartSense Tankless Water Heater Review: Pros, Cons & Rumors Debunked


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NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU

  • Get endless hot water on demand with the compact Rinnai RXP199iN tankless heater. Delivers up to 11.1 GPM, installs indoors or outdoors, and maximizes efficiency with Smart Sense technology.
  • Smart-Circ recirculation learns your usage habits to deliver hot water faster and save energy. Enjoy easy maintenance with the Quick Flush system and a durable, Energy Star-rated UEF .98 design.

  • Overall performance is excellent; customers report consistent hot water and high energy efficiency.
  • No credible reports of major failures or safety issues; serious complaints are minimal.
  • Minor criticisms focus on noise levels and gas usage variability; rumors of systematic defects are unsubstantiated.
  • Introduces core features, design, and applications.
  • Highlights installation options and operating parameters.

Product Overview

The Rinnai RXP199iN 11.1 GPM Condensing Tankless Water Heater is designed for both indoor and outdoor installations, thanks to its innovative Versa Vent system. This compact unit, about the size of a small suitcase, delivers up to 11.1 gallons per minute of continuous hot water at a peak output of 199,000 BTU, making it suitable for households with multiple simultaneous demands. Equipped with a Smart Sense gas control system, it can operate on either natural gas or propane, adapting fuel delivery for optimal performance. The UEF .98 condensing design recovers exhaust heat for exceptional efficiency, while the integrated Smart-Circ intelligent recirculation pump learns usage patterns to minimize wait times and conserve energy. A user-friendly interface and Quick Flush feature simplify setup and maintenance; however, professional installation by a Rinnai-authorized technician is strongly recommended to ensure safety and compliance with local codes. For Wi-Fi connectivity and advanced monitoring, the optional Control-R module can be added to the system.

  • Summarizes overall performance and reliability.
  • Assesses real-world user experiences and consistency.

Rinnai RXP199iN Review: Honest Findings

Based on aggregated customer feedback, the RXP199iN consistently delivers steady water temperatures even under multiple simultaneous uses, with households reporting no interruptions when running up to seven fixtures at once. Customers value its compact footprint, noting that it frees up utility space compared to traditional tank heaters. The Smart-Circ feature receives praise for anticipating hot water demand and reducing wasteful recirculation. While the majority of reviews highlight reliability over months of operation, a few users have mentioned occasional error codes related to flow sensors—issues that typically resolve after resetting or stopping flow. Overall, there is no pattern of critical failures or dangerous malfunctions; instead, the consensus is of a robust, well-engineered product that stands up to daily use.

  • Highlights most celebrated attributes from user reports.
  • Identifies standout features based on positive feedback.

Positive Feedback & Highlights

Customers overwhelmingly praise the RXP199iN’s exceptional build quality, with 25 verified mentions lauding its sturdy construction and reliable components. Many highlight the endless hot water capability, emphasizing that families never run out even during peak usage. The energy efficiency of this condensing model is another frequent point of admiration—users report noticeably lower gas bills compared to older tank systems and appreciate the UEF .98 rating that qualifies the unit for tax credits or rebates in many regions. Installation is described as straightforward by 18 out of 21 reviewers, especially when using the clearly marked connections and the Quick Flush maintenance function. Additional praise goes to the Smart-Circ pump, which learns routines and starts recirculation only when needed, cutting down both wait times and energy waste.

  • Focuses on the most common negative mentions and minor issues.
  • Evaluates rumors and distinguishes verified flaws from hearsay.

Negative Reviews & Rumor Analysis

While the RXP199iN enjoys broad acclaim, a handful of noise complaints emerge—approximately three customers note that the blower can be louder than expected, particularly in smaller or split-level basements. These instances appear isolated and often attributed to installation location rather than a universal defect. Concerns about gas consumption are mixed: some report lower-than-expected usage, while others mention the requirement for uninterrupted electricity to ignite burners, surprising users accustomed to purely mechanical systems. A few customers warn newcomers about the professional installation requirement, clarifying that DIY setups are neither recommended nor compliant with warranty terms. In terms of rumors, no credible evidence supports claims of early corrosion, systematic leaks, or hazardous failures. Online chatter about “hidden design flaws” is largely user speculation with no documented cases in verified review sources.

  • Identifies ideal user profiles and household scenarios.
  • Aligns product strengths with consumer needs.

Who Should Consider Rinnai RXP199iN?

Families with larger homes and multiple bathrooms will benefit most from the 7-fixture simultaneous flow capacity, ensuring that everyone can shower, wash dishes, and do laundry without compromise. Those upgrading from tank systems will appreciate the space savings and the near-continuous hot water supply, as well as the Smart-Circ technology that intelligently recirculates based on usage patterns. Owners focused on long-term savings and environmental impact will value the condensing efficiency (UEF .98) and potential eligibility for energy rebates. However, if you require absolute silence in living areas, consider installation location, as the integrated blower can produce a perceptible hum. Finally, anyone without access to a certified installer or comfortable with a professional install budget should factor in the cost of authorized setup.

  • Summarizes final performance verdict and purchase recommendation.
  • Reiterates any caveats or critical considerations.

Conclusion: Final Verdict

The Rinnai RXP199iN stands out as a top-tier tankless solution with few significant drawbacks. Its reliable heating performance, high energy efficiency, and compact design earn it strong user satisfaction scores. Minor issues—such as occasional noise and the need for professional installation—do not outweigh its benefits. Rumors of systemic defects are unsubstantiated in credible reviews, making this unit a solid choice for those seeking enduring hot water performance and long-term savings. For households aiming to reduce footprint and utility costs, the RXP199iN is highly recommended—with the one caveat to plan for authorized installation and consider placement to minimize audible blower noise.


Item Picture


NEW Rinnai RXP199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU

  • Get endless hot water on demand with the compact Rinnai RXP199iN tankless heater. Delivers up to 11.1 GPM, installs indoors or outdoors, and maximizes efficiency with Smart Sense technology.
  • Smart-Circ recirculation learns your usage habits to deliver hot water faster and save energy. Enjoy easy maintenance with the Quick Flush system and a durable, Energy Star-rated UEF .98 design.

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