If you’re looking for an efficient and eco-friendly way to heat your water, electric tankless water heaters might be the solution you’ve been searching for. These appliances provide endless hot water on demand while helping you save on energy bills. In 2025, several top models stand out for their technology and performance. Curious about which ones made the list? Let’s explore the best options available this year.
EcoSmart ECO 11 Electric Tankless Water Heater
If you’re looking for an efficient and compact hot water solution, the EcoSmart ECO 11 Electric Tankless Water Heater is an excellent choice for small households or spaces. This unit offers a powerful 13KW output and patented self-modulating technology, ensuring you get endless hot water on demand. It’s just 11.5 x 8 x 3.75 inches, making it 90% smaller than traditional tank heaters. With a maximum flow rate of 3.1 gallons per minute, it maintains water temperature within 1°F of your setting. Plus, it boasts a lifetime warranty on electronics, making it a reliable investment for your hot water needs.
Best For: The EcoSmart ECO 11 Electric Tankless Water Heater is best for small households or spaces that require an efficient and compact hot water solution.
Pros:
- Endless hot water on demand, eliminating the need for a traditional tank.
- Compact design, making it suitable for small bathrooms, sinks, and breakrooms.
- High energy efficiency with 99% thermal energy efficiency, leading to potential cost savings.
Cons:
- Limited flow rate of 3.1 gallons per minute may not meet the needs of larger households simultaneously.
- Best suited for warmer climates; may struggle in colder temperatures with multiple outlets.
- Requires a 220-240 volt electrical supply and specific amperage, which may necessitate electrical upgrades.
Rheem 11kW 240V Tankless Electric Water Heater
The Rheem 11kW 240V Tankless Electric Water Heater is an ideal choice for homeowners seeking energy efficiency and convenience. With an adjustable digital temperature display and ON/OFF dial control, you can easily manage your hot water settings. Its self-modulating power control guarantees peak energy use, delivering on-demand hot water with a flow rate of up to 2.68 GPM. You’ll enjoy a consistent and continuous supply without the wait. Plus, the side 1/2 NPT water connections make installation straightforward. If you want reliable performance while being eco-friendly, this model is definitely worth considering for your home.
Best For: Homeowners seeking an energy-efficient and convenient solution for on-demand hot water.
Pros:
- Energy-efficient design with self-modulating power control to reduce energy consumption.
- Consistent hot water supply with a flow rate of up to 2.68 GPM, suitable for various household needs.
- Easy installation with side 1/2 NPT water connections and user-friendly controls.
Cons:
- Higher upfront cost compared to traditional tank water heaters.
- Requires sufficient electrical supply, which may necessitate electrical upgrades in some homes.
- Limited flow rate may not meet the demands of larger households simultaneously using multiple hot water sources.
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
For homeowners seeking a reliable and efficient hot water solution, the Rheem RTEX-24 24kW Electric Tankless Water Heater stands out with its impressive flow rate of 5.9 gallons per minute. This compact unit, measuring just 17.63W x 18.25H x 3.5 inches, mounts easily on your wall and offers a maximum temperature of 140°F. With 99.8% efficiency, it guarantees continuous hot water while reducing standby heat loss. The adjustable dial control and digital display let you customize your temperature in 1-degree increments. Just remember, it requires a 200 AMP service and proper electrical setup for peak performance.
Best For: Homeowners looking for an efficient, space-saving hot water solution that provides continuous supply without the need for a traditional tank.
Pros:
- High Efficiency: Operates at 99.8%, minimizing energy waste and reducing utility bills.
- Compact Design: At 93% smaller than conventional water heaters, it saves valuable space in your home.
- Customizable Temperature Control: Features adjustable settings with a digital display for precise temperature management.
Cons:
- Requires Professional Installation: Needs proper electrical setup and a 200 AMP service, which may incur additional costs.
- Performance Affected by Ground Water Temperature: Flow rate and efficiency can vary based on the incoming water temperature.
- Limited Warranty Information: Warranty details must be requested, which may be inconvenient for customers needing clarity.
Tankless Electric Water Heater 3000W
Designed for compact spaces, the Tankless Electric Water Heater 3000W is perfect for those seeking instant hot water in kitchens, bathrooms, or even RVs. With a powerful 3000W output, it heats water efficiently, raising temperatures by 82°F in just 3-5 seconds. Its wall-mounted design saves space, while safety features like dry-burning protection and automatic power-off guarantee peace of mind. Weighing only 2.44 pounds, it’s easy to install under sinks. Plus, it comes with a 24-month warranty and customer support for added reassurance. Enjoy hot water on demand with this eco-friendly, reliable solution for your home or travel needs.
Best For: Those looking for an efficient and space-saving solution for instant hot water in small kitchens, bathrooms, or RVs.
Pros:
- Compact design allows for easy under-sink installation and saves space.
- Instant heating capability provides hot water within 3-5 seconds, ideal for quick tasks.
- Safety features including dry-burning protection and automatic power-off ensure safe operation.
Cons:
- Limited flow rate may not be sufficient for simultaneous use in larger households.
- Requires professional installation for optimal performance and safety compliance.
- Electric dependence means it won’t work during power outages, limiting usability.
Rheem 8kW 240V Tankless Electric Water Heater
Looking for a space-saving solution to guarantee you never run out of hot water? The Rheem 8kW 240V Tankless Electric Water Heater (Model RTEX-08) is your answer. With a flow rate of up to 1.95 GPM, it delivers on-demand, continuous hot water for your needs. Its compact design makes it perfect for point-of-use applications, while the adjustable digital temperature display allows for easy control. Weighing just 6.34 pounds and wall-mounted, it fits seamlessly into any space. Customers have rated it 4.1 out of 5 stars, reflecting its reliability and efficiency. Enjoy hot water whenever you need it!
Best For: Those seeking an efficient, space-saving water heater for point-of-use applications that provides continuous hot water on demand.
Pros:
- Compact design makes it ideal for small spaces and easy installation.
- On-demand hot water ensures you never run out, perfect for busy households.
- Adjustable digital temperature display allows for precise temperature control.
Cons:
- Limited flow rate of up to 1.95 GPM may not be sufficient for larger households with multiple hot water needs simultaneously.
- Requires 240V electrical service, which may need additional installation considerations.
- Wall-mounted installation may not be suitable for all locations, requiring careful planning.
SIVUATEK 14kW Tankless Electric Water Heater
The SIVUATEK 14kW Tankless Electric Water Heater stands out as an ideal choice for homeowners seeking an efficient and space-saving solution for their hot water needs. With a flow rate of 3.3 GPM, it delivers endless hot water, perfect for simultaneous usage in kitchens and bathrooms. Its compact design allows for easy wall or under-sink installation, and you won’t deal with standby energy loss—saving up to 60% on heating costs. Equipped with safety features, an intuitive LED display, and a 30-day return policy, this model guarantees reliability and user-friendly experience for everyone.
Best For: Homeowners looking for an efficient, space-saving hot water solution that can support multiple simultaneous usages.
Pros:
- Energy Efficient: Reduces water heating costs by up to 60% compared to traditional models, eliminating standby energy loss.
- Compact Design: Easy to install in tight spaces, either wall-mounted or under-sink.
- Safety Features: Includes leakage protection, overheating protection, and an auto shut-off for added safety.
Cons:
- Electrical Requirements: Requires a dedicated 60-amp circuit breaker, which may necessitate additional electrical work.
- Limited Flow Rate: Flow rate of 3.3 GPM may not be sufficient for larger households with high simultaneous demand.
- Initial Cost: The upfront cost may be higher compared to traditional tank water heaters.
ORBEK 14kW Tankless Electric Water Heater
If you need an efficient hot water solution for multiple points of use, the ORBEK 14kW Tankless Electric Water Heater stands out with its impressive flow rate of up to 3.38 gallons per minute. This compact unit, measuring just 9.5W x 14.2H x 3.1D inches, provides endless hot water in only three seconds. With a high energy efficiency, it can cut electricity costs by up to 60% compared to traditional heaters. Plus, its advanced safety features guarantee peace of mind. The LED digital display makes temperature adjustments easy, and 24/7 customer support is always available for your needs.
Best For: Individuals or families looking for an energy-efficient, space-saving solution to provide endless hot water for multiple points of use.
Pros:
- High flow rate of up to 3.38 GPM, suitable for 2-3 points of use simultaneously.
- Energy-efficient design reduces electricity costs by up to 60% compared to traditional tank heaters.
- Advanced safety features including leakage protection and over-temperature protection ensure user safety.
Cons:
- Requires a 240V/60AMP two-pole breaker and specific wiring, which may necessitate professional installation.
- Limited to 3.38 GPM, which might not be sufficient for larger households with higher hot water demands.
- Compact size may limit installation options in certain spaces or configurations.
Rheem 6.5kW 240V Point of Use Thermostatic Tankless Electric Water Heater
For homeowners seeking a reliable, space-saving solution for hot water needs, the Rheem 6.5kW 240V Point of Use Thermostatic Tankless Electric Water Heater stands out. This compact unit measures just 10.88 inches wide and weighs only 4 pounds, making it perfect for tight spaces. It delivers endless hot water on demand, reaching temperatures up to 140°F. With a maximum flow rate of 1.5 gallons per minute, you’ll enjoy consistent performance. Plus, its energy-saving design heats water only when needed, reducing consumption. Backed by a solid warranty, it’s an excellent choice for residential and light commercial use.
Best For: Homeowners and light commercial users looking for an efficient, space-saving solution for hot water needs.
Pros:
- Endless hot water on demand, ensuring you never run out during use.
- Compact design that is 90% smaller than traditional tank heaters, ideal for tight installation spaces.
- Energy-efficient operation that heats water only when needed, reducing overall energy consumption.
Cons:
- Limited maximum flow rate of 1.5 gallons per minute may not be sufficient for multiple simultaneous uses.
- Requires a 240V electrical connection, which may necessitate electrical upgrades in some homes.
- The warranty period may be considered shorter compared to some other water heater options on the market.
Westinghouse 14kW Electric Tankless Water Heater
Looking for a reliable solution to meet your hot water needs? The Westinghouse 14kW Electric Tankless Water Heater is an excellent choice. It delivers endless hot water with a maximum flow rate of 3.4 GPM, perfect for simultaneous use in a shower and sink. With smart control compatibility for Alexa and Google Home, you can easily adjust temperatures from 86°F to 140°F. Its compact design saves space, while safety certifications guarantee reliability. Weighing just 10.4 pounds, it’s easily installed and suitable for various settings. Customers rate it 4.0 out of 5 stars, making it a dependable option for modern households.
Best For: The Westinghouse 14kW Electric Tankless Water Heater is best for modern households and offices that require efficient and continuous hot water for multiple points of use.
Pros:
- Instant hot water delivery with a maximum flow rate of 3.4 GPM, suitable for simultaneous use in showers and sinks.
- Smart control compatibility with Alexa and Google Home for convenient temperature adjustments.
- Compact and lightweight design allows for easy installation and saves valuable space.
Cons:
- Requires a dedicated 60 AMP breaker and 6 AWG wiring, which may involve additional installation costs.
- Customer ratings are average at 4.0 out of 5 stars, indicating some mixed feedback.
- Limited to a maximum temperature of 140°F, which may not meet the needs of all users.
ECOTOUCH Electric Tankless Water Heater (ECO270S)
The ECOTOUCH Electric Tankless Water Heater (ECO270S) is an ideal choice for small homes or apartments with 2-4 usage points, delivering instant hot water on demand. With a remarkable energy efficiency of 99.8% and a flow rate of up to 5.5 GPM, you’ll enjoy endless hot water at 125°F or higher within seconds. The user-friendly touch control panel makes temperature adjustments a breeze, while safety features protect against leaks and overheating. Compact and stylish, this unit requires professional installation and can save you up to 60% on electric bills compared to traditional heaters, making it a smart, eco-friendly investment.
Best For: Small homes or apartments with 2-4 usage points that require instant hot water on demand.
Pros:
- Energy efficiency of 99.8%, significantly reducing electric bills.
- Provides endless hot water quickly, reaching temperatures of 125°F or higher within seconds.
- Compact design allows for easy installation in limited spaces.
Cons:
- Requires professional installation, which may incur additional costs.
- High electrical demand (113 Amp Max Draw) may necessitate upgrades to the electrical system.
- Limited to a maximum temperature of 131°F, which may not meet all user preferences.
Factors to Consider When Choosing Electric Tankless Water Heaters
When you’re choosing an electric tankless water heater, there are several key factors to keep in mind. You’ll want to take into account the flow rate capacity, energy efficiency rating, and compact design options to guarantee it fits your needs. Temperature control features and installation requirements are also essential for a seamless setup and peak performance.
Flow Rate Capacity
Choosing the right flow rate capacity is essential for ensuring your electric tankless water heater meets your household’s hot water needs. Flow rate, measured in gallons per minute (GPM), indicates how much hot water you can access on demand. If you have a larger household or often use multiple fixtures simultaneously, opt for a higher flow rate, like 5.9 GPM. Remember, incoming water temperature impacts flow rate; in colder climates, you might see a decrease as it takes more energy to heat the water. To find the best fit, assess your peak hot water demand—usually ranging from 1.5 GPM for single-use to over 3 GPM for several fixtures—and consider the necessary temperature rise for ideal performance.
Energy Efficiency Rating
Understanding flow rate capacity is just one part of selecting the right electric tankless water heater. Energy efficiency ratings typically range from 99% to 99.8%, highlighting their ability to convert energy into hot water with minimal losses. These heaters use self-modulating technology, adjusting power consumption based on your water flow and temperature needs, which saves significant energy compared to traditional tank models. They operate within a temperature range of 80°F to 140°F, allowing you to customize settings for ideal efficiency. Additionally, many models eliminate standby heat loss, a common issue with conventional heaters. By choosing a tankless water heater with a higher efficiency rating, you could potentially cut your electricity bills by up to 60%.
Compact Design Options
Compact design options are a game-changer for anyone looking to optimize space in their home or office. Electric tankless water heaters are typically 90% smaller than traditional tank models, making them perfect for tight spots like small bathrooms or under sinks. With dimensions around 11.5 x 8 x 3.75 inches, you can easily wall-mount them without taking up precious floor space. Plus, many models weigh as little as 6.5 pounds, which simplifies installation and handling. These heaters efficiently support multiple point-of-use applications, providing hot water for 1-3 outlets simultaneously. Their space-saving nature allows for flexible installation in various settings, including apartments, RVs, and office breakrooms. You’ll appreciate the convenience and efficiency they bring to your daily routine.
Temperature Control Features
When it comes to electric tankless water heaters, temperature control features play an essential role in ensuring you get the hot water you need at the right temperature. Many models offer adjustable digital displays, allowing you to set precise temperatures between 80°F and 140°F. Self-modulating technology maintains a consistent output temperature, often within ±1°F of your selected setting, enhancing your comfort. Some advanced units even let you adjust temperatures in 1°F increments, giving you finer control. Look for user-friendly interfaces with LED displays that show real-time water temperature and system status. High-efficiency models adapt their heating power based on water flow and incoming temperatures, ensuring peak performance and energy savings for your home.
Installation Requirements
Choosing the right electric tankless water heater involves careful consideration of installation requirements to guarantee peak performance and safety. Start by checking that your home has a dedicated circuit breaker, typically between 40 to 60 amps, as most units operate at 240 volts. You’ll need appropriate wiring, like 6 AWG or 8 AWG, to handle the electrical load. Make sure the plumbing connections are compatible, usually using 1/2 NPT or 3/4 NPT fittings. While you might be tempted to tackle the installation yourself, it’s often best to hire a professional to ensure compliance with local codes and avoid safety hazards, especially for higher wattage models. Finally, consider the unit’s dimensions for wall-mounted installations to guarantee proper support.
Safety Mechanisms
While selecting an electric tankless water heater, it’s essential to prioritize safety mechanisms that protect both the unit and your home. Look for models with leakage protection systems to prevent water leaks and potential flooding. Over-temperature protection is another important feature, automatically shutting off the unit if water temperatures exceed safe levels. Dry-heating protection is common too; it turns off the heater if no water flows, preventing damage to the heating elements. Additionally, check for high-voltage protection, which safeguards against electrical surges. Finally, consider advanced models with multiple layers of safety certification, such as ETL or UL, ensuring they meet rigorous safety standards and have undergone thorough testing for your peace of mind.
Warranty and Support
Understanding the warranty and support options available for electric tankless water heaters can greatly impact your purchasing decision. Many models offer varying warranty durations, often including a lifetime warranty on essential components like electronics and heat exchangers. However, be mindful that labor and incidental damages may not be covered. Customer reviews suggest satisfaction ratings for warranty and support typically range from 4.0 to 4.7 out of 5 stars, highlighting the importance of reliable service. Some manufacturers even provide a 30-day return policy, which allows you to return the product if it doesn’t meet your expectations. Finally, check warranty details and customer support availability to guarantee smooth claim processes and an overall positive experience.
