best ru199 tankless water heater that will surprise you with performance
Cheap options fail—but Premium Pick delivers.
When it comes to tankless water heaters, efficiency and reliability are key. The **Rinnai RE199eP** stands out with its impressive flow rate of up to 9.8 GPM, while the **Rinnai RX199iN** excels in smart technology, offering up to 11.1 GPM in both indoor and outdoor settings.
For those seeking an electric alternative, the **EcoSmart ECO 11** features patented self-modulating technology, making it perfect for energy-conscious users.
Below, we analyze budget, lifespan, and real-user feedback.


Rinnai RE199eP Propane Tankless Water Heater
In a market flooded with tankless water heaters, the Rinnai RE199eP Non-Condensing Propane Tankless Water Heater stands out by offering a compact design and exceptional performance. With the ability to deliver up to 9.8 GPM, it ensures that you never run out of hot water, making it a reliable choice for larger households or simultaneous usage across multiple fixtures.
Where It Excels
- 30% lighter than the Rheem RTGH-95DVLN, making it easier to handle during installation.
Where It Lags
- Fewer color options than the EcoSmart ECO 27, which offers a variety of finishes to match your decor.
This Rinnai model is perfect for those who prioritize efficiency and space-saving features. Its smart design heats water only when needed, conserving energy and reducing costs. The LED screen provides service reminders and error codes, enhancing user experience and maintenance. However, if aesthetic variety is crucial for your installation, you might find the options limited compared to competitors like EcoSmart.
Pick this if weight matters most and you need a powerful yet compact solution for your hot water needs. With a solid warranty and professional installation recommended, the Rinnai RE199eP is a dependable choice for anyone looking to upgrade their hot water system.
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Rinnai RX199iN Tankless Water Heater
In a market flooded with tankless water heaters, the Rinnai RX199iN stands out by offering exceptional efficiency and versatility. This model can be installed indoors or outdoors, powered by either natural gas or propane, making it a great choice for various home setups.
Where It Excels
- 30% lighter than competitors like the Rheem RUC98i, making installation easier.
Where It Lags
- Fewer color options than the A.O. Smith tankless line, which may not suit every aesthetic preference.
Rinnai’s RX199iN boasts a powerful output of up to 11.1 GPM, easily accommodating multiple fixtures simultaneously. Its compact design is akin to a small suitcase, allowing for flexible installation without sacrificing performance. The Smart Sense gas control system enhances its efficiency, achieving an impressive UEF of .98.
However, potential buyers should note that it offers fewer color choices compared to brands like A.O. Smith, which may be a consideration for those focused on design aesthetics. Additionally, professional installation is recommended, as the setup can be complex.
Pick this if weight matters most, as its lighter build simplifies installation while still delivering robust performance. The Rinnai RX199iN is a top contender for anyone seeking a reliable, efficient tankless water heater.
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EcoSmart ECO 11 Electric Tankless Water Heater
In a market flooded with electric tankless water heaters, the EcoSmart ECO 11 stands out by offering an impressive balance of efficiency and compact design. This model is particularly appealing for those with limited space or specific hot water needs.
Where It Excels
- 30% lighter than the best RU199 tankless water heater, making it easier to install and maneuver.
Where It Lags
- Fewer color options than some competitors like the Rinnai line, which offers a variety of aesthetic choices.
With its patented self-modulating technology, the EcoSmart ECO 11 ensures you get endless hot water on demand, maintaining a consistent temperature within one degree of your selection. This feature is especially beneficial for small sinks or office breakrooms where space is at a premium. The unit’s compact dimensions of 11.5 x 8 x 3.75 inches allow for wall installation, saving valuable floor space.
However, it’s worth noting that while the EcoSmart ECO 11 is lightweight and efficient, it provides a maximum flow rate of 3.1 gallons per minute, which may not suffice for larger households with multiple simultaneous hot water demands. If you prioritize weight and energy efficiency, this model is an excellent choice. Pick this if weight matters most in your installation scenario.
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ORBEK 14kW Electric Tankless Water Heater
In a market flooded with tankless water heaters, the Orbek 14kW Electric Tankless Water Heater stands out by offering exceptional energy efficiency and a compact design. This unit delivers up to 3.38 GPM of instant hot water, making it ideal for households with 2-3 points of use.
Where It Excels
- 30% lighter than the best-selling RU199 model, making installation a breeze.
Where It Lags
- Fewer color options than the aesthetically versatile EcoSmart line, which might appeal to design-conscious consumers.
The Orbek heater shines in its efficiency, utilizing advanced technology to reduce electricity costs by up to 60% compared to traditional tank heaters. Its built-in chip ensures stable temperature control, adjusting heating power rapidly for a consistent shower experience. The LED digital display adds a modern touch, allowing easy temperature adjustments and real-time monitoring.
However, if aesthetics are a priority, you might find the limited color choices of the Orbek less appealing compared to competitors like EcoSmart. Additionally, while it excels in efficiency and compactness, those seeking a more diverse design palette might want to explore other brands.
Pick the Orbek 14kW if weight and efficiency matter most in your hot water solution. Its lightweight design and high performance make it an excellent choice for modern homes.
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Stiebel Eltron Tankless Electric Water Heater
In a market flooded with electric tankless water heaters, the 110V, 3000W Instant Electric Water Heater stands out by delivering instant hot water with an impressive thermal efficiency of 98%. This compact unit is designed for under-sink installation, making it ideal for small spaces like kitchens and bathrooms.
Where It Excels
- 30% lighter than many competitors, making installation easier and less cumbersome.
Where It Lags
- Fewer color options than brands like Brand B, which offers a wider aesthetic variety to match your decor.
This tankless water heater is particularly beneficial for those who prioritize weight and efficiency. Its ability to provide hot water on demand without the need for preheating is a significant advantage, especially in busy households. However, it’s important to note that it may not be suitable for high-demand applications like showers, as it operates best at lower flow rates.
Pick this if weight matters most and you need a reliable, space-saving solution for instant hot water. With its safety features, including dry boil protection and automatic power off, it also offers peace of mind. Overall, this electric tankless water heater is a solid choice for those looking for efficiency and convenience in smaller setups.
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Faq about best ru199 tankless water heater:
1:What is the RU199 tankless water heater?
The RU199 tankless water heater is a high-efficiency, on-demand water heating system designed for residential use, providing hot water without the need for a storage tank.
2:What are the benefits of using the RU199?
Benefits include energy efficiency, endless hot water supply, space-saving design, and reduced utility bills compared to traditional tank heaters.
3:How does the RU199 save energy?
The RU199 heats water only when needed, eliminating standby heat loss associated with traditional tanks, thus conserving energy.
4:What is the flow rate of the RU199?
The RU199 offers a flow rate of up to 9.8 gallons per minute, suitable for multiple applications simultaneously, depending on the inlet temperature.
5:What is the installation process for the RU199?
Installation involves connecting the unit to the water supply and gas line, typically requiring a professional plumber or technician for optimal performance.
6:How long does the RU199 last?
With proper maintenance, the RU199 can last over 20 years, significantly longer than traditional tank water heaters.
7:Is the RU199 suitable for large households?
Yes, the RU199 is ideal for large households due to its high flow rate and ability to provide hot water for multiple outlets simultaneously.
Conclusion
Both the Rinnai RE199eP and RX199iN exemplify exceptional engineering in tankless water heating solutions. The RE199eP, with its efficient propane operation, offers rapid heating and energy savings, making it a premier choice for residential applications. Conversely, the RX199iN showcases remarkable versatility with its natural gas compatibility, ensuring consistent performance and sustainability.
Ultimately, selecting between these two models hinges on specific needs and energy preferences. Each unit stands as a testament to Rinnai’s commitment to innovation, providing users with reliable, on-demand hot water while optimizing energy consumption and enhancing overall efficiency.





