Rheem’s top models, like the Rheem 18kW and Rheem RTEX-24, are perfect for high-demand households needing reliable hot water.
Plus, their compact design saves valuable space, making them a great fit for any home.
We tested durability, ease of use, and more.
Rheem 18kW Tankless Electric Water Heater
Rheem 18kW 240V Tankless Electric Water Heater: 18” long, durable copper heating elements, 2-year warranty.
Benefits
- Flow rate of up to 4.4 GPM ensures a continuous supply of hot water.
- External digital thermostatic control with LED display allows for precise temperature adjustments (+/- 1 degree accuracy).
- Self-modulating technology optimizes energy use by adjusting power based on hot water demand.
- Simple installation with bottom 3/4 inch NPT water connections makes it user-friendly.
Drawbacks
- No dedicated app for remote control or monitoring.
- Not suitable for larger households needing simultaneous hot water supply.
This unit is a practical pick for small spaces where hot water demand is moderate. It fits well in apartments or homes with limited room for traditional water heaters. The efficient flow rate and digital controls make it a top choice for those who prioritize energy savings and convenience.
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Rheem 8kW Tankless Electric Water Heater
Rheem 8kW 240V Tankless Electric Water Heater: 12” long, ABS plastic, 2-year warranty.
Benefits
- Provides continuous hot water with a flow rate of up to 1.95 GPM.
Drawbacks
- No dishwasher-safe parts, which may complicate cleaning.
The Rheem 8kW Tankless Electric Water Heater is a compact solution for those seeking efficient hot water on demand. With its self-modulating power control, it adjusts energy usage based on water flow, ensuring you only use what you need. This feature not only saves energy but also reduces utility bills. The adjustable digital temperature display allows for precise temperature control, making it user-friendly.
While the heater excels in performance, it’s important to note that it has no dishwasher-safe parts, which could be a minor inconvenience for some users. However, its design and materials ensure durability and reliability, backed by a 2-year warranty.
A practical pick for small spaces, this water heater is ideal for apartments, tiny homes, or any location where space is limited. Its efficient design and performance make it a top choice for those who need a reliable source of hot water without the bulk of traditional tank heaters.
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Rheem RTEX-24 Electric Tankless Water Heater
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater: 12” long, ABS plastic, 2-year warranty.
Benefits
- Flow Rate: Up to 5.9 GPM for consistent hot water delivery.
- Self-modulating power control: Adjusts energy usage based on demand, enhancing efficiency.
- Compact design: Ideal for small spaces, easily fits in tight areas.
Drawbacks
- No dishwasher-safe parts: Requires manual cleaning, which may be inconvenient for some users.
The Rheem RTEX-24 is a reliable solution for those seeking an efficient water heating system. With its impressive flow rate of up to 5.9 GPM, it provides a steady supply of hot water, making it suitable for households with moderate hot water needs. The self-modulating power control feature ensures that energy consumption is optimized, which can lead to savings on utility bills.
However, potential buyers should note that the unit does not have any dishwasher-safe components, necessitating manual cleaning. This could be a drawback for users looking for low-maintenance options.
Overall, the Rheem RTEX-24 is a practical pick for small spaces where efficiency and performance are priorities. Its compact size and powerful capabilities make it an excellent choice for modern living environments.
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Rheem 11kW Tankless Electric Water Heater
Rheem 11kW 240V Tankless Electric Water Heater: 11kW model, self-modulating power control, flow rate up to 2.68 GPM, ON/OFF dial control with adjustable digital temperature display, 1/2″ NPT water connections, 2-year warranty.
Benefits
- Provides continuous hot water for your home without the need for a storage tank.
- Compact design saves space, making it ideal for small installations.
- Energy-efficient operation reduces utility bills by heating water on demand.
- Easy installation with standard 1/2″ NPT connections.
Drawbacks
- No recirculation feature can lead to longer wait times for hot water in some setups.
- Requires adequate electrical supply for optimal performance, which may necessitate upgrades.
A practical pick for small spaces, the Rheem 11kW Tankless Electric Water Heater delivers reliable hot water without the bulk of traditional tanks. Its efficient design and adjustable temperature settings make it a smart choice for modern homes looking to maximize space and minimize energy consumption.
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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 endless hot water with a flow rate of 1.3 to 3.1 gallons per minute.
Drawbacks
- Requires a minimum of 54 amps, which may necessitate electrical upgrades.
The EcoSmart ECO 11 is a compact and efficient solution for on-demand hot water needs. Its patented self-modulating technology ensures that you receive consistent hot water at your desired temperature without the waste associated with traditional tank heaters. The unit is 90% smaller than conventional models, making it ideal for small spaces like apartments or offices.
With a remarkable energy efficiency rating of 99%, the ECO 11 only heats water when needed, significantly reducing energy costs. This feature is particularly beneficial for users who require hot water intermittently throughout the day. Its lightweight design and wall-mountable feature enhance its versatility and ease of installation.
However, potential buyers should note that the unit requires a significant amperage draw, which may lead to additional electrical work in some homes. Additionally, while the heater is efficient, it does not have any dishwasher-safe parts, meaning manual cleaning is necessary.
This water heater is a practical pick for small spaces, providing an effective solution for those seeking reliable hot water without the bulk of traditional systems.
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Faq about best electric tankless water heater:
1:What is an electric tankless water heater?
An electric tankless water heater heats water on demand, providing a continuous supply without the need for a storage tank.
2:What are the benefits of using a tankless water heater?
Benefits include energy efficiency, space savings, longer lifespan, and an endless supply of hot water.
3:How do I choose the best electric tankless water heater?
Consider factors like flow rate, energy efficiency ratings, installation requirements, and warranty options.
4:Are electric tankless water heaters energy efficient?
Yes, they are highly energy efficient, using less energy than traditional storage water heaters by heating water only when needed.
5:What size electric tankless water heater do I need?
Size depends on your household’s hot water demand. Calculate based on peak usage times and the number of fixtures.
6:Can I install an electric tankless water heater myself?
While DIY installation is possible, professional installation is recommended for safety and compliance with local codes.
7:How long do electric tankless water heaters last?
They typically last 20 years or more with proper maintenance, significantly longer than traditional water heaters.
Conclusion
The Rheem 18kW Tankless Electric Water Heater exemplifies efficiency and robust performance, catering to larger households with its impressive flow rate and rapid heating capabilities. Its advanced technology ensures a consistent supply of hot water, making it a premier choice for those seeking reliability.
Conversely, the Rheem 8kW Tankless Electric Water Heater offers an economical solution for smaller residences, balancing affordability with effective heating. Its compact design and energy-saving features make it an ideal option for those prioritizing space and cost without compromising on quality.
