For homeowners seeking endless hot water, the best electric tankless water heater delivers efficiency and space savings.
The right ensures reliable performance, with models like the Rheem 18kW offering robust power for larger households.
From the compact EcoSmart ECO 11 for apartments to the high-capacity Rheem RTEX-24 for whole-home use, these units adapt to any need.
We detail the pros, cons, and key installation insights ahead.
Rheem 18kW Tankless Water Heater
The Rheem 18kW 240V Tankless Electric Water Heater is our top-ranked choice for the best electric tankless water heater . Key specs: 18kW power, a compact gray chassis, copper immersion heating elements, and includes an external digital thermostat.
Benefits
- Its advanced self-modulation technology intelligently adjusts energy use to match demand, providing serious savings on your electricity bill.
- You get a consistent and precise temperature with the external digital control, which offers accuracy within one degree.
- With a flow rate of up to 4.4 gallons per minute, it can effortlessly supply multiple showers and appliances simultaneously in most homes.
- The field-serviceable design and straightforward bottom water connections make long-term maintenance and installation simpler.
Drawbacks
- A professional installation is strongly recommended, as this unit requires a substantial electrical service upgrade in many older homes.
- The initial investment is higher than a standard tank heater, though the operational savings quickly offset it.
The Rheem 18kW is the ultimate upgrade for homeowners seeking endless hot water, superior efficiency, and modern control. It’s the perfect permanent solution for energy-conscious families ready to ditch their bulky tank.
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EcoSmart ECO 11 Tankless Water Heater
The EcoSmart ECO 11 Electric Tankless Water Heater is designed to provide on-demand hot water for a single point of use, ideal for small households or supplemental applications. Its compact dimensions of 11.5 x 8 x 3.75 inches allow for flexible installation under a sink or in a tight utility space. This unit solves the problem of waiting for hot water and eliminates the standby energy loss associated with traditional tank heaters.
Pros
- Exceptional space savings due to its compact, wall-mount design.
- High energy efficiency, only heating water when needed, which reduces electricity costs.
- The patented self-modulating technology maintains temperature within one degree for consistent performance.
- Provides a continuous supply of hot water, so it never runs out during use.
- Simple installation at the point of use minimizes heat loss through pipes.
Cons
- Requires a significant electrical upgrade, including a 54-amp double-pole breaker and proper wiring.
- Flow rate is limited; it is best suited for one shower or faucet at a time in cooler climates.
- The initial investment is higher than a standard tank heater, though operational savings offset this over time.
The ECO 11 performs reliably for its intended low-flow applications, such as a guest bathroom, kitchen sink, or office breakroom. Its standout feature is the smart modulation that adjusts power to match demand, ensuring efficiency. This model represents strong value within the best electric tankless water heater category for targeted needs. It is best suited for homeowners seeking to upgrade a single fixture or add an independent hot water source without the bulk of a tank. The primary considerations are ensuring your electrical panel can support it and understanding its flow limitations based on your groundwater temperature.
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Rheem 24kW Tankless Water Heater
For homeowners seeking a reliable, whole-house solution, the Rheem RTEX-24 stands out as a leading contender for the title of best electric tankless water heater .
Pros
- The unit provides continuous hot water on demand, eliminating the wait for a storage tank to recover.
- Its compact, space-saving design requires no venting, offering significant installation flexibility.
- The adjustable digital temperature control allows for precise settings in one-degree increments.
- This model operates with high efficiency, which can lead to noticeable energy savings over time.
Cons
- The electrical demand is substantial, requiring three dedicated 40-amp double-pole breakers.
- A 200-amp household service is strongly recommended, which may necessitate a costly panel upgrade for some homes.
- Final performance is directly impacted by your local groundwater temperature, affecting flow rate.
When your home’s electrical system can support it, this Rheem model delivers exceptional performance and efficiency.
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ORBEK 14kW Tankless Water Heater
Finding a reliable, high-performance electric tankless water heater can be a daunting task, but the ORBEK 14kW model makes a compelling case for itself. As the fourth-ranked unit in our evaluation, it stands out by delivering robust on-demand hot water with a focus on precise control and safety.
Pros
- Provides a consistent and endless supply of hot water, capable of serving 2-3 fixtures simultaneously without the dreaded cold shock.
- Exceptional energy efficiency is a major draw; its advanced design can lead to significant savings on your electricity bill.
- The LED digital display offers intuitive control and clear real-time temperature feedback, making adjustments simple.
- Packed with multiple safety certifications and protections, it offers outstanding peace of mind for household use.
- Its compact footprint is a space-saver, freeing up valuable utility area compared to bulky tank models.
Cons
- Requires substantial electrical infrastructure: a 60-amp double-pole breaker and 6-gauge wiring are mandatory, which may necessitate a professional electrician.
- The maximum flow rate is ideal for moderate demand; larger households with more concurrent uses might need a higher-output model.
- The initial setup complexity places it firmly in the DIY+ category or requires professional installation.
For those with the proper electrical setup seeking efficient, on-demand hot water, the ORBEK proves why it’s considered among the best electric tankless water heater options. It expertly balances performance, smart features, and safety in a sleek package.
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WINTEMP 27kW Electric Tankless Heater
Tired of running out of hot water mid-shower or paying to heat a tank 24/7? The WINTEMP 27kW Electric Tankless Heater fixes it with on-demand endless hot water and smart energy use.
Why It Works
- Endless hot water supply solves the problem of cold showers for households with 2-4 simultaneous users.
- WiFi control and stable temperature prevents inconvenient adjustments and fluctuations during use.
- Compact wall-mounted design addresses the issue of bulky, space-consuming traditional tank heaters.
- Self-regulating power technology directly tackles high energy bills by only heating water when needed.
Trade-offs
- Significant electrical requirements, needing a 250A service and specific breakers, but this enables its powerful whole-house performance.
- A higher upfront complexity compared to simple tank replacements, yet it results in long-term utility savings and space gains.
The WINTEMP is a strong contender for the best electric tankless water heater , especially for homes with adequate electrical capacity. Worth it for frequent users seeking reliable, endless hot water and lower operating costs.
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FAQ about the best electric tankless water heater
1: What defines the best electric tankless water heater ?
The preeminent s demonstrate exceptional reliability, offer comprehensive warranties, and provide robust technical support. They manufacture units with superior flow rates and precise temperature modulation.
2: Which s are considered leaders in this market?
Stiebel Eltron, Rheem, and EcoSmart are frequently cited as industry leaders. Each offers a distinct portfolio, from premium German engineering to cost-effective domestic solutions.
3: How important is the warranty when selecting a ?
The warranty period is a critical indicator of a ‘s confidence in its product’s longevity. Leading s often provide extensive warranties on heating elements, sometimes exceeding a decade.
4: What technical specifications should I prioritize?
Prioritize the electrical requirements (voltage/amperage), the gallons-per-minute (GPM) flow rate at your target temperature rise, and the unit’s energy efficiency rating.
5: Can these systems service an entire household?
Yes, whole-house electric tankless models are available. Their capacity depends on simultaneous hot water demand; proper sizing by a qualified professional is paramount for adequate performance.
Conclusion
The Rheem 18kW model delivers robust, high-volume performance for demanding multi-point applications, prioritizing consistent flow. Alternatively, the EcoSmart ECO 11 emphasizes intelligent efficiency and compact design through its self-modulating technology, ideal for targeted point-of-use or smaller households.
Your selection ultimately hinges on the specific balance of simultaneous hot water demand and operational economy required for your installation. Assess your household’s peak usage against each unit’s calibrated output to finalize your investment.
