75% of users prefer tankless electric water heaters for instant hot water.
That’s why the Rheem 18kW 240V Tankless Electric Water Heater dominates with its efficient performance and compact design.
Few know its advanced technology not only saves energy but also extends the lifespan of the unit significantly.
Our review covers long-term value vs. rivals, ensuring you make an informed choice for your hot water needs.
Rheem 18kW Tankless Electric Water Heater
The adjustable valve sets the Rheem 18kW 240V Tankless Electric Water Heater apart from competitors, providing precise control over water temperature and flow. This unit is constructed with durable materials, featuring copper immersion heating elements and a robust design that ensures longevity. With dimensions that facilitate easy installation, it includes bottom 3/4 inch NPT water connections for straightforward integration into existing plumbing systems.
Key Advantages
- The self-modulating technology adjusts power to meet hot water demand efficiently, optimizing energy use.
- With a flow rate of up to 4.4 GPM, it delivers sufficient hot water for multiple applications simultaneously.
- The 316-grade stainless steel components resist corrosion, making it suitable for various water conditions.
- Field serviceable elements enhance maintenance ease, reducing downtime.
Limitations
- Not compatible with traditional tank water heater systems, which may require additional modifications.
- Requires a dedicated electrical supply, making installation more complex in some settings.
Best for outdoor enthusiasts needing a reliable and efficient hot water solution for camping or remote locations, the Rheem 18kW unit offers advanced features and performance that cater to demanding hot water needs.
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ORBEK 14kW Electric Tankless Water Heater
The adjustable valve sets the ORBEK 14kW Tankless Water Heater apart from its competitors. This innovative feature allows users to fine-tune the water temperature, ensuring optimal comfort and efficiency. Constructed with 316-grade stainless steel, this unit resists corrosion and enhances durability. With dimensions of 14.2″H x 9.5″L x 3.1″W, it is compact enough to fit in tight spaces, making it ideal for various installations.
Key Advantages
- The heater provides an impressive flow rate of up to 3.38 GPM, delivering instant hot water for 2-3 points of use simultaneously. This is particularly beneficial for households with multiple hot water needs.
- Its high energy efficiency, utilizing water-electricity separation, can reduce electricity costs by up to 60% compared to traditional tank-style heaters.
- The built-in chip maintains stable temperature control, adjusting heating power 20,000 times per second to keep water temperature within 1°F.
Limitations
- This unit is not compatible with standard 120V outlets, requiring a dedicated 240V/60AMP two-pole breaker for installation.
Best for outdoor enthusiasts needing an efficient and reliable hot water solution, the ORBEK 14kW Tankless Water Heater combines advanced technology with user-friendly features, making it an excellent choice for modern homes.
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EcoSmart ECO 11 Electric Tankless Water Heater
The adjustable valve sets the EcoSmart ECO 11 Electric Tankless Water Heater apart from its competitors. This innovative feature allows users to fine-tune their hot water output, ensuring optimal performance tailored to specific needs. Constructed with 316-grade stainless steel, the unit resists corrosion, enhancing its longevity and reliability. With compact dimensions of 11.5 x 8 x 3.75 inches, it is designed to save space, making it ideal for various installations, whether on a wall or at the point of use.
Key Advantages
- Energy Efficient: The EcoSmart ECO 11 boasts a thermal energy efficiency rating of 99%, only heating water on demand, unlike traditional tank heaters that waste energy maintaining temperature.
- Consistent Performance: Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of the selected temperature.
- Versatile Sizing: Ideal for low-flow applications, it provides between 1.3 and 3.1 gallons per minute, depending on inlet water temperature.
Limitations
- Not compatible with high-demand applications requiring more than 3.1 gallons per minute.
Best for outdoor enthusiasts needing an efficient, space-saving solution for on-demand hot water, the EcoSmart ECO 11 is a top choice for small sinks, bathrooms, and office breakrooms.
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Rheem RTEX-24 24kW Electric Water Heater
The adjustable valve sets the Rheem RTEX-24 24kW 240V Electric Tankless Water Heater apart from its competitors. This unit boasts a compact design, measuring 18.5 x 14 x 4.5 inches, and is constructed from durable materials, including a high-quality 316-grade stainless steel heat exchanger that resists corrosion, ensuring longevity and reliability.
Key Advantages
- Featuring an ON/OFF dial control with an adjustable digital temperature display, the Rheem RTEX-24 allows users to set temperatures in precise 1-degree increments from 80 to 140 degrees Fahrenheit, catering to specific hot water needs.
- Its tankless design ensures continuous hot water supply, making it ideal for whole-home applications, while saving valuable space and reducing energy costs.
- With a requirement of 3 x 40 AMP double pole breakers and a recommended 200 AMP household service, this unit is designed for efficient performance in homes equipped to handle its power needs.
Limitations
- Not compatible with standard 120V outlets, requiring significant electrical infrastructure to be in place.
- Performance may vary based on geographic location and ground water temperature, so it’s essential to review the performance guide to ensure adequate hot water supply.
Best for outdoor enthusiasts needing a reliable, space-saving solution for hot water, the Rheem RTEX-24 is a top choice for those who prioritize efficiency and performance in their water heating systems.
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WINTEMP 36kW Tankless Electric Water Heater
The adjustable valve sets the WINTEMP 36kW Tankless Electric Water Heater apart from its competitors. This unit boasts a robust construction with 316-grade stainless steel, ensuring durability and resistance to corrosion. Its compact dimensions of 13.7” (W) x 21.1” (H) x 5.3” (D) make it an ideal choice for tight spaces, allowing for wall-mounted installation.
Key Advantages
- The self-regulating technology optimizes energy consumption based on real-time flow and temperature, achieving up to 99% energy savings. This feature is particularly beneficial for households with 3-5 hot water usage points, as it ensures a maximum output of 8.7 gallons per minute without the wait for preheating.
Limitations
- It is not compatible with standard 120V outlets, requiring a dedicated 240V supply and specific breaker configurations, which may necessitate professional installation.
Best for outdoor enthusiasts and homeowners seeking an efficient, space-saving solution for hot water needs, the WINTEMP 36kW Tankless Electric Water Heater delivers on-demand hot water without the drawbacks of traditional tank systems. With features like WiFi control and multiple safety protections, it ensures convenience and peace of mind for users who prioritize efficiency and reliability in their home appliances.
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Faq about best tankless electric water heaters:
1:What is a tankless electric water heater?
A tankless electric water heater heats water on demand, providing hot water without the need for a storage tank.
2:What are the benefits of tankless electric water heaters?
They offer energy efficiency, endless hot water supply, space-saving design, and lower operating costs compared to traditional water heaters.
3:How do I choose the best tankless electric water heater?
Consider factors like flow rate, energy efficiency rating, brand reputation, and installation requirements to find the best model for your needs.
4:What is the lifespan of a tankless electric water heater?
Typically, tankless electric water heaters last between 15 to 20 years with proper maintenance.
5:Are tankless electric water heaters more expensive?
Yes, they usually have a higher upfront cost but can save money in the long run through reduced energy bills.
6:Can I install a tankless electric water heater myself?
While DIY installation is possible, it is recommended to hire a professional for safety and compliance with local codes.
7:Do tankless electric water heaters require maintenance?
Yes, regular maintenance, including descaling and checking electrical components, is essential for optimal performance.
Conclusion
Rheem’s 18kW Tankless Electric Water Heater exemplifies efficiency and reliability, delivering consistent hot water while minimizing energy consumption. Its advanced technology ensures optimal performance, making it a premier choice for discerning consumers.
Conversely, the ORBEK 14kW Electric Tankless Water Heater offers a compact design without compromising on power, catering to smaller households seeking effective solutions. Both products stand out for their innovative features and user-centric design, establishing them as leaders in the market.