Navien Electric Tankless Water Heater – Are These 5 Picks Worth It?
Did you know that 80% of homeowners prefer the Navien electric tankless water heater for energy efficiency?
This trend highlights why the Navien 14kW Tankless Water Heater stands out, offering unmatched hot water delivery for your home’s needs.
Additionally, few realize its compact design saves valuable space, making it perfect for smaller homes or apartments.
Our review explores the long-term value of Navien compared to other electric tankless water heaters on the market.


ORBEK 14kW Electric Tankless Water Heater
14kW Tankless Water Heater Electric: 14.2”H x 9.5”L x 3.1”W, ETL Certified, 2-year warranty.
Benefits
- Provides up to 3.38 GPM of endless hot water for 2-3 points of use simultaneously.
Drawbacks
- Requires a 240V/60AMP two-pole breaker for installation.
This Orbek electric tankless water heater is a powerful solution for instant hot water needs. Its compact size allows it to fit into tight spaces, making it ideal for small homes or apartments. The impressive energy efficiency can reduce electricity costs by up to 60% compared to traditional tank heaters, making it a cost-effective choice in the long run.
The built-in chip ensures stable temperature control, adjusting heating power 20,000 times per second. This means you can enjoy a comfortable shower experience without fluctuations in water temperature. The LED digital display makes it easy to monitor and adjust the temperature between 86°F and 140°F.
However, potential buyers should note that this unit requires specific electrical connections, which may necessitate professional installation. Additionally, while it is designed for efficiency and safety, it does not include any dishwasher-safe parts for easy cleaning.
A practical pick for small spaces, the Orbek tankless water heater is perfect for those looking to maximize comfort and efficiency in their hot water supply.
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Rheem 18kW Tankless Electric Water Heater
Rheem 18kW 240V Tankless Electric Water Heater: 12” long, ABS plastic, 2-year warranty.
Benefits
- Flow Rate – Up to 4.4 GPM, ensuring a steady supply of hot water.
- Advanced self-modulation – Adjusts power to meet hot water demand efficiently.
- Durable construction – Copper immersion two heating elements are field serviceable.
- Easy installation – Bottom 3/4 inch NPT water connections simplify setup.
Drawbacks
- No dishwasher-safe parts, which may require careful cleaning.
A practical pick for small spaces, the Rheem 18kW Tankless Electric Water Heater is an excellent solution for those needing an efficient hot water source without the bulk of a traditional tank. Its compact design and high flow rate make it suitable for apartments and smaller homes. The self-modulating feature ensures that energy is conserved, adapting to your hot water needs seamlessly. However, potential buyers should note that while the unit is durable, the lack of dishwasher-safe components could be a hassle when it comes to maintenance. Overall, this water heater provides reliable performance and ease of installation, making it a smart choice for anyone looking to optimize their hot water system.
To buy this product, click here.
Rheem RTEX-24 Electric Tankless Water Heater
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater: 12” long, ABS plastic, 2-year warranty.
Benefits
- Continuous hot water supply for the whole home, ensuring comfort during peak usage.
- Easily adjustable ON/OFF dial control with a digital display allows for precise temperature settings from 80-140 degrees F.
- Space-saving design eliminates the need for bulky tanks, making it ideal for smaller homes.
- Efficient operation reduces energy costs compared to traditional water heaters.
Drawbacks
- No dishwasher-safe parts may require additional care during cleaning.
- Requires 3 x 40 AMP Double Pole Breakers, which may necessitate electrical upgrades in some homes.
A practical pick for small spaces, the Rheem RTEX-24 provides reliable and efficient hot water on demand. Its compact design and adjustable settings make it suitable for various household needs, while the absence of a tank helps save space and energy. However, potential buyers should ensure their electrical system can accommodate its requirements. Overall, this unit is an excellent choice for those seeking a modern solution to hot water needs.
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EcoSmart ECO 11 Electric Tankless Water Heater
EcoSmart ECO 11 Electric Tankless Water Heater: 11.5” x 8” x 3.75”, ABS plastic, 2-year warranty.
Benefits
- Provides 1.3 to 3.1 gallons-per-minute depending on inlet water temperature.
Drawbacks
- Requires 54 A amperage draw, which may necessitate electrical upgrades.
The EcoSmart ECO 11 is a compact solution for those needing consistent hot water without the bulk of traditional tank heaters. Its tankless design ensures that you have endless hot water on demand, making it ideal for small sinks, bathrooms, or office breakrooms. The unit is energy efficient, utilizing 99% thermal energy efficiency by heating water only when needed, unlike conventional heaters that waste energy maintaining temperature.
However, potential users should note that the ECO 11 requires a significant amperage draw of 54 A, which could mean additional electrical work for some homes. Additionally, while it is designed for efficiency and space-saving, the unit does not come with dishwasher-safe parts, which may be a consideration for maintenance.
This product is a practical pick for small spaces, offering a reliable and efficient hot water solution without the footprint of traditional systems.
To buy this product, click here.
Rheem 11kW Tankless Electric Water Heater
Rheem 11kW 240V Tankless Electric Water Heater: 11kW model, ABS plastic, 2-year warranty.
Benefits
- On demand, consistent and continuous hot water ensures comfort and convenience.
- Flow rate of up to 2.68 GPM allows for multiple outlets to be used simultaneously.
- Self-modulating power control optimizes energy use, saving on utility bills.
- Compact design fits easily into small spaces, making it ideal for apartments or tight areas.
Drawbacks
- No dishwasher-safe parts may require manual cleaning, which could be inconvenient for some users.
A practical pick for small spaces.
To buy this product, click here.
Faq about Navien Electric Tankless Water Heater:
1: What is a Navien electric tankless water heater?
A Navien electric tankless water heater provides on-demand hot water without the need for a storage tank, ensuring a continuous supply while saving energy.
2: How does a Navien electric tankless water heater work?
It heats water directly as it flows through the unit, using electrical elements to achieve the desired temperature instantly.
3: What are the benefits of using a Navien electric tankless water heater?
Benefits include energy efficiency, space-saving design, endless hot water, and lower utility bills due to reduced standby heat loss.
4: How do I install a Navien electric tankless water heater?
Installation should be performed by a licensed professional, ensuring compliance with local codes and optimal performance.
5: What maintenance is required for a Navien electric tankless water heater?
Regular maintenance includes descaling the unit annually and checking for any leaks or issues with the electrical connections.
6: What is the lifespan of a Navien electric tankless water heater?
Typically, these units can last over 20 years with proper maintenance, making them a long-term investment.
7: Are there any warranties on Navien electric tankless water heaters?
Navien offers warranties that vary by model, generally covering parts for a period of up to 15 years, depending on registration and installation conditions.
Conclusion
Both the ORBEK 14kW Electric Tankless Water Heater and the Rheem 18kW Tankless Electric Water Heater exemplify cutting-edge efficiency and performance in modern water heating solutions. The ORBEK model stands out for its compact design and rapid heating capabilities, making it an ideal choice for smaller spaces without compromising on comfort.
Conversely, the Rheem unit offers superior power and reliability, catering to larger households with its robust output. Each product showcases innovative technology, ensuring optimal energy conservation while delivering consistent hot water, underscoring their prominence in the market for electric tankless water heaters.





