I’ve researched the 15 best electric tankless heaters of 2026, and they offer quick, reliable hot water with smart features like WiFi and precise temperature control. These units vary in power and flow rate, making them suitable for small homes, under sinks, or multiple fixtures. They’re energy-efficient, certified for safety, and easy to install. If you want detailed insights on the top models and what to contemplate, keep exploring — you’ll find everything you need to make an informed choice.
Key Takeaways
- Features top-rated models with high flow rates and rapid heating for instant hot water delivery.
- Emphasizes safety certifications, durability, and energy efficiency for reliable performance.
- Highlights compact, space-saving designs suitable for residential, commercial, or RV use.
- Includes smart technology compatibility for remote control and real-time monitoring.
- Provides detailed specifications on wattage, installation, and application suitability for various households.
More Details on Our Top Picks
Electric Tankless Water Heater with WiFi Control
If you’re looking for a highly convenient and modern hot water solution, the Electric Tankless Water Heater with WiFi Control is an excellent choice. I love how it provides on-demand hot water for the whole house, with a maximum flow of 6.5 GPM and a temperature up to 140°F. Its compact, wall-mounted design saves space, and the LED display makes temperature adjustments easy. Plus, WiFi control lets me change settings remotely, adding flexibility. It’s energy-efficient, regulating power automatically to save up to 99% compared to traditional heaters. Safety features and certifications give me peace of mind, making this heater both practical and reliable.
- Power Rating:27kW
- Voltage:240V
- Flow Rate Capacity:Up to 6.5 GPM
- Control Interface:WiFi app, LED display
- Safety Certifications:ETL
- Space/Installation Size:Compact wall-mounted (11.1” W x 19.1” H)
- Additional Feature:WiFi remote control
- Additional Feature:LED temperature display
- Additional Feature:Compact wall-mounted design
110V Electric Tankless Water Heater Compact Under Sink
The V Electric Tankless Water Heater is an ideal choice for those seeking a compact, space-saving solution for under-sink water heating. Its 110V, 3000W power output delivers instant hot water without taking up much room. The sleek design fits easily under sinks, making installation quick and hassle-free. You can effortlessly switch between Fahrenheit and Celsius, and the user-friendly temperature monitor ensures precise control. It requires a circuit breaker of at least 32 amps and uses standard 1/2 NPT threading. Eco-friendly and energy-efficient, this heater reduces standby heat loss and lowers energy bills, making it perfect for small households or point-of-use applications.
- Power Rating:3000W
- Voltage:110V
- Flow Rate Capacity:Not specified
- Control Interface:Manual, simple setup
- Safety Certifications:Not specified
- Space/Installation Size:Very compact under-sink
- Additional Feature:Easy temperature monitoring
- Additional Feature:Space-saving design
- Additional Feature:Suitable for under-sink
MIZUDO 11kW Tankless Water Heater with Digital Display
Designed for small households or spaces where quick hot water is essential, the MIZUDO 11kW Tankless Water Heater offers rapid heating and precise temperature control. It heats water in just 3 seconds with a flow rate of up to 2.6 GPM, perfect for 1-2 points of use. The digital LED display makes adjusting and monitoring temperature easy, with stability within ±1°F. Compact and wall-mounted, it saves space and features high energy efficiency at 98%, reducing electricity costs. Certified by ETL, it includes safety protections like leakage and over-temperature safeguards, ensuring safe, reliable operation for indoor installation.
- Power Rating:11kW
- Voltage:240V
- Flow Rate Capacity:Up to 2.6 GPM
- Control Interface:Digital touch display
- Safety Certifications:ETL
- Space/Installation Size:Small, wall-mounted (14.2” H x 9.5” L)
- Additional Feature:Digital touch control
- Additional Feature:Fast 3-second heating
- Additional Feature:20,000 adjustments/sec
Westinghouse 14kW WiFi Tankless Water Heater Alexa Compatible
For homeowners seeking a smart, space-saving hot water solution, the Westinghouse 14kW WiFi Tankless Water Heater stands out as an excellent choice. With a 3.38 GPM flow rate and compatibility with Alexa and Google Home, it offers convenient remote control and temperature adjustments from 86°F to 140°F. Its compact design (14.2″ x 9.5″ x 3.5″) easily mounts on the wall, saving space. Built for durability, it features multiple safety protections and corrosion-resistant pathways, ensuring long-lasting performance. Ideal for small households or apartments, it provides continuous hot water for up to three points of use without fluctuations or delays.
- Power Rating:14kW
- Voltage:240V
- Flow Rate Capacity:3.38 GPM
- Control Interface:WiFi app, LED display
- Safety Certifications:ETL
- Space/Installation Size:Compact wall-mount (14.2” H x 9.5” W)
- Additional Feature:Alexa voice control
- Additional Feature:Real-time status display
- Additional Feature:Low maintenance design
14kW Electric Tankless Water Heater with Digital Display
A 14kW electric tankless water heater with a digital display offers precise temperature control and efficient hot water delivery, making it an ideal choice for households needing multiple points of use. It operates on 240V and provides up to 3.38 GPM, suitable for 2-3 simultaneous outlets. The digital interface allows easy temperature adjustments between 86°F and 140°F, with real-time monitoring. Its compact design simplifies installation, requiring minimal space. Safety features like leakage, over-temperature, dry-heating protection, and lightning resistance ensure reliable operation. Thanks to advanced water-electricity separation, it’s highly efficient, saving up to 60% on energy compared to traditional tank heaters.
- Power Rating:14kW
- Voltage:240V
- Flow Rate Capacity:Up to 3.38 GPM
- Control Interface:Digital LED display, knob control
- Safety Certifications:ETL
- Space/Installation Size:Compact, wall-mounted
- Additional Feature:Soft LED lighting
- Additional Feature:Precise temperature control
- Additional Feature:Compact space-saving size
Portable Electric Tankless Water Heater with Digital Display
The Portable Electric Tankless Water Heater with Digital Display stands out as an ideal choice for anyone needing instant hot water in small spaces or on the go. Its compact, wall-mounted design makes it perfect for kitchens, bathrooms, RVs, and camping trips. It heats water in just 3-5 seconds without preheating, with a maximum temperature of 55°C/131°F. The digital LCD shows real-time status and temperature, and it supports Celsius or Fahrenheit. Safety features like waterproofing, leakage protection, and automatic shutoff guarantee reliable operation. Weighing only 2.4 pounds, it’s easy to install and perfect for point-of-use applications.
- Power Rating:3000W
- Voltage:110V
- Flow Rate Capacity:Up to 2.9 GPM
- Control Interface:Digital LCD, switch between Celsius/Fahrenheit
- Safety Certifications:ETL
- Space/Installation Size:Small, wall-mounted
- Additional Feature:Portable mini size
- Additional Feature:Waterproof IPX4 rated
- Additional Feature:Temperature lock feature
Westinghouse Apolo Mini Tankless Water Heater with WiFi
If you’re looking for a compact, smart water heater perfect for small spaces, the Westinghouse Apolo Mini Tankless Water Heater with WiFi stands out. Its small size (6.9×8.1×2.5 inches) makes it ideal for sinks and vanities. With 3.5kW heating power, it provides instant hot water for handwashing or dish rinsing, but isn’t designed for showers. The unit features a separated heating element to reduce scale buildup and corrosion, ensuring durability. Plus, WiFi connectivity lets you control temperature, restart, or monitor remotely via app or voice commands with Alexa or Google Home. It’s a convenient, energy-efficient choice for single faucet use.
- Power Rating:3.5kW
- Voltage:120V
- Flow Rate Capacity:Not specified
- Control Interface:WiFi app, LED display
- Safety Certifications:WiFi, safety protections
- Space/Installation Size:Compact, wall-mounted (6.9”x8.1”x2.5”)
- Additional Feature:Small space fit
- Additional Feature:Anti-scald technology
- Additional Feature:WiFi app control
ThermoMate Tankless Electric Water Heater 14kW
Designed for small-scale residential use, the ThermoMate 14kW tankless electric water heater offers reliable on-demand hot water with a compact, space-saving design. It supports up to two faucets and one shower simultaneously, delivering around 2.66 GPM at a 35°F temperature rise. Its electronic temperature control adjusts from 86°F to 131°F in 1-degree increments, ensuring precise comfort. The self-modulating technology optimizes energy use, achieving 99% efficiency and saving up to 60% on heating costs. Built with a durable, leak-proof cast aluminum chamber, it’s safe, corrosion-resistant, and easy to install, making it ideal for point-of-use applications like bathrooms and small sinks.
- Power Rating:14kW
- Voltage:240V
- Flow Rate Capacity:Up to 4.17 GPM
- Control Interface:LED digital display
- Safety Certifications:ETL
- Space/Installation Size:Small, wall-mounted
- Additional Feature:Cast aluminum heating chamber
- Additional Feature:Over-temperature protection
- Additional Feature:LED digital display
EcoSmart ECO 11 Electric Tankless Water Heater
Looking for an efficient, space-saving water heater perfect for small-scale applications? The EcoSmart ECO 11 is an excellent choice. It’s a compact, 13KW unit that fits easily in tight spaces, measuring just 11.5 x 8 x 3.75 inches. Thanks to its patented self-modulating technology, it provides endless hot water while only heating water when needed, making it 99% thermally efficient. It’s ideal for point-of-use setups like bathrooms or sinks, delivering between 1.3 and 3.1 gallons per minute. Its continuous temperature monitoring guarantees consistent hot water without fluctuations, all while saving energy and space.
- Power Rating:13kW
- Voltage:240V
- Flow Rate Capacity:2.66 GPM
- Control Interface:Digital LED display
- Safety Certifications:ETL
- Space/Installation Size:Compact, wall-mounted
- Additional Feature:Self-modulating technology
- Additional Feature:Space-efficient size
- Additional Feature:90% smaller footprint
Rheem 11kW 240V Tankless Electric Water Heater
The Rheem 11kW 240V Tankless Electric Water Heater stands out as an excellent choice for households seeking reliable, on-demand hot water with straightforward controls. It features an easy-to-use ON/OFF dial and an adjustable digital temperature display, making it simple to set your preferred hot water temperature. Its self-modulating power control optimizes energy use, ensuring efficiency. With an 11kW power output and a flow rate up to 2.68 GPM, it provides continuous hot water for various household needs. Its compact design and 1/2 NPT water connections make installation straightforward, making it a versatile and dependable solution.
- Power Rating:11kW
- Voltage:240V
- Flow Rate Capacity:Up to 2.68 GPM
- Control Interface:Digital display, knob control
- Safety Certifications:UL listed
- Space/Installation Size:Small, wall-mounted
- Additional Feature:Self-modulating power control
- Additional Feature:Adjustable digital display
- Additional Feature:Compact design
FOGATTI 14kW Tankless Electric Water Heater
If you need a compact, energy-efficient solution for providing instant hot water to multiple points, the FOGATTI 14kW Tankless Electric Water Heater is an excellent choice. It offers a 3.3 GPM flow rate, ideal for 2-3 outlets, and features a sleek 14.3 x 9.6 x 3.5-inch design that mounts easily on your wall. With an impressive 98% efficiency and precise temperature control from 86°F to 140°F, it ensures stable hot water delivery. Certified by ETL and equipped with safety features like overheating prevention and leak detection, this heater combines performance, safety, and convenience for your home.
- Power Rating:14kW
- Voltage:240V
- Flow Rate Capacity:Up to 3.3 GPM
- Control Interface:LED display, knob control
- Safety Certifications:ETL
- Space/Installation Size:Compact, wall-mounted
- Additional Feature:Micro-adjustments control
- Additional Feature:Safety leak detection
- Additional Feature:Modern gray design
Ranein 13kW Tankless Electric Water Heater
For those seeking reliable, on-demand hot water for small to medium households or specific points like a bathroom or kitchen, the Ranein 13kW Tankless Electric Water Heater stands out. It provides endless hot water with a flow rate of up to 3.1 GPM, making it ideal for 1-2 water points. Its upgraded constant temperature control guarantees stable hot water, and the LED smart display makes adjustments easy. Safety features like overheat and leak protection add peace of mind. Compact and no preheating needed, it’s simple to install and suitable for various scenarios, offering efficient, on-demand hot water where you need it most.
- Power Rating:13kW
- Voltage:240V
- Flow Rate Capacity:Up to 3.1 GPM
- Control Interface:LED display, knob
- Safety Certifications:UL, ETL
- Space/Installation Size:Small, wall-mounted
- Additional Feature:Constant temperature control
- Additional Feature:LED smart display
- Additional Feature:Compact installation size
Airthereal 27kW Tankless Water Heater for Multiple Showers
Designed for households with multiple showers or high hot water demands, the Airthereal 27kW Tankless Water Heater delivers continuous hot water on demand. It heats water instantly, eliminating worries about running out or fluctuating temperatures during busy mornings. Its compact, wall-mounted design uses 90% less space than traditional tanks, fitting easily into small areas. Thanks to self-modulating technology, it only heats water when needed, reducing energy bills by up to 50%. Built with safety features like high-temperature protection and dry heating safeguards, it’s reliable and safe for everyday use. Just verify your electrical system can handle the 240V, 3x 40A circuit requirements.
- Power Rating:27kW
- Voltage:240V
- Flow Rate Capacity:Not specified
- Control Interface:Safety and temperature monitoring via digital display
- Safety Certifications:Safety protections included
- Space/Installation Size:Wall-mounted, space-efficient
- Additional Feature:Multiple safety protections
- Additional Feature:Space-saving wall mount
- Additional Feature:High energy efficiency
18kW Tankless Water Heater 4.17 GPM Indoor ETL Certified
The 18kW electric tankless water heater with a 4.17 GPM flow rate is an ideal choice for homeowners seeking reliable, space-saving hot water solutions for multiple fixtures. Its compact size of just 17H x 13.0L x 3.9W makes installation easy in tight spaces. It delivers instant hot water within 3 seconds and maintains temperature stability within 1°F, thanks to advanced digital controls and real-time monitoring. ETL certified, it features safety protections like leakage and over-temperature safeguards. Designed for indoor use, it’s energy-efficient, potentially reducing electricity costs by up to 60%. This heater combines performance, safety, and space-saving design for a dependable hot water supply.
- Power Rating:18kW
- Voltage:240V
- Flow Rate Capacity:Up to 4.17 GPM
- Control Interface:LED digital display
- Safety Certifications:ETL
- Space/Installation Size:Compact, wall-mounted
- Additional Feature:Real-time temp monitoring
- Additional Feature:Advanced safety features
- Additional Feature:Easy DIY installation
Fogatti 18kW Tankless Electric Water Heater
If you’re seeking an efficient, compact electric tankless heater that can handle multiple outlets simultaneously, the Fogatti 18kW model is an excellent choice. It offers on-demand hot water at 240V, supporting up to 4.4 GPM for 2-3 points of use in a home. Its sleek gray design measures just 17.1 x 12.9 x 3.9 inches and weighs around 20 pounds, making installation flexible. With 98% efficiency and a maximum temperature of 140°F, it ensures reliable, precise temperature control. Features like advanced safety protections and an intuitive LED display make it user-friendly and safe for everyday use.
- Power Rating:18kW
- Voltage:240V
- Flow Rate Capacity:Up to 4.4 GPM
- Control Interface:LED display, soft lighting
- Safety Certifications:ETL
- Space/Installation Size:Compact, wall-mounted (17.1” x 12.9”)
- Additional Feature:Micro-adjustment chip
- Additional Feature:Modern design
- Additional Feature:High heating efficiency
Factors to Consider When Choosing an Electric Tankless Heater
When choosing an electric tankless heater, I consider factors like power requirements and flow rate to guarantee it meets my household’s needs. I also look at temperature control features and safety certifications to keep everything dependable and secure. Finally, I check space and installation constraints to make sure it fits comfortably in my setup.
Power Requirements
Choosing an electric tankless heater requires careful attention to its power needs, as this directly affects both safety and performance. The unit’s wattage determines the size of the circuit breaker needed, often 40A or 60A, and influences the wiring gauge—higher wattage models, like 18kW or 27kW, need thicker wiring such as 6 AWG or 8 AWG to prevent overheating. Compatibility with your household electrical system is essential; most units require a 240V supply, and using the wrong voltage can hinder operation. Proper power configuration ensures stable water temperature and flow, especially when multiple outlets are in use simultaneously. Understanding these power requirements helps prevent electrical issues and guarantees your heater operates efficiently and safely.
Flow Rate Capacity
The flow rate capacity of an electric tankless heater, measured in gallons per minute (GPM), determines how much hot water it can deliver at once. Choosing a unit with the right GPM ensures all fixtures, like showers and sinks, get enough hot water without pressure drops. For homes with multiple outlets, I recommend selecting a heater with a higher GPM rating—typically 3-4 GPM—to meet combined demands. Keep in mind, colder incoming water requires a higher GPM to maintain your desired output temperature. Overestimating your needs can waste energy, while underestimating may leave you short during peak usage. Accurately evaluating your household’s hot water demand helps you find a model that balances performance and efficiency effectively.
Temperature Control Features
Accurate temperature regulation is essential for ensuring comfort, safety, and energy efficiency with electric tankless heaters. Many models feature digital displays and micro-adjustments, often in 1°F increments, allowing precise temperature tuning. Advanced units use built-in chips capable of up to 20,000 micro-adjustments per second, maintaining stable water temperatures even during flow rate changes. The ability to switch between Fahrenheit and Celsius adds convenience and customization for users worldwide. Consistent temperature stability within ±1°F prevents scalding and guarantees a comfortable shower experience. Reliable temperature control features also optimize energy use by adjusting heating output based on real-time water flow and temperature needs. Overall, these features ensure a safe, efficient, and personalized hot water experience.
Safety Certifications
When selecting an electric tankless heater, prioritizing safety certifications is essential to guarantee the unit meets established safety standards. Look for heaters with ETL or UL certification, as these indicate they’ve passed rigorous testing for electrical, fire, and water safety. Certified units often include protective features like leak detection, overheat prevention, and dry-fire safeguards, reducing risks during operation. Choosing a certified heater not only minimizes chances of electrical faults, scalding, or water damage but also assures you of product reliability. Certifications serve as a mark of quality, showing the heater adheres to recognized safety protocols and industry standards. Ensuring your heater is certified is a critical step toward safe, dependable hot water whenever you need it.
Space and Installation
Choosing the right electric tankless heater involves carefully considering its size and how well it fits your space. Measure the available area to verify the unit’s dimensions, which can range from compact 6.9 inches to over 17 inches tall, will fit comfortably. Also, confirm that your electrical system meets the heater’s wiring and breaker requirements, typically 40A or 60A double-pole breakers. Water connection sizes, usually 1/2 NPT or 3/4 NPT, should match your plumbing for straightforward installation. Think about the weight and mounting method to validate the heater can be securely attached to your wall without extra support. Lastly, note how much space the unit saves—tankless models occupy up to 90% less space than traditional tanks—allowing flexible placement in tight areas.
Frequently Asked Questions
How Energy-Efficient Are the Latest Electric Tankless Heaters?
The latest electric tankless heaters are highly energy-efficient, often converting up to 98% of electricity into heat. I’ve found they reduce energy waste because they only heat water on demand, unlike traditional tanks that constantly heat and reheat water. This means lower utility bills and less energy consumption. Their advanced technology guarantees you get hot water instantly while saving energy, making them a smart, eco-friendly choice for any home.
Can Electric Tankless Heaters Handle Simultaneous Multiple Outlets?
Absolutely, electric tankless heaters can handle multiple outlets at once, but it’s like juggling fire—if the unit isn’t powerful enough, you’ll end up with cold surprises. Higher capacity models, especially those rated for 3-5 GPM, are designed for simultaneous use. I recommend choosing a unit with a high flow rate and proper wiring to guarantee steady hot water without compromising efficiency or safety.
What Is the Typical Lifespan of an Electric Tankless Water Heater?
Most electric tankless water heaters last about 20 years with proper maintenance. I’ve found that their lifespan depends on factors like water quality, usage, and regular servicing. To extend their life, I recommend flushing the system annually and checking for mineral buildup. When maintained well, these heaters can be a reliable, long-term solution for instant hot water, saving energy and space over traditional tank models.
Are There Specific Maintenance Requirements for These Heaters?
Yes, electric tankless water heaters do require some maintenance. I recommend flushing them annually to remove mineral buildup, especially if you have hard water. Also, check the inlet filter regularly and clean it to prevent clogs. Inspect electrical connections periodically for corrosion or loose wires. Keeping these components in good shape guarantees your heater works efficiently and lasts longer, saving you money and hassle over time.
How Do Installation Costs Compare to Traditional Water Heaters?
Installation costs for electric tankless heaters can be 20-40% higher than traditional water heaters. I’ve found that while upfront expenses are steeper, you save on long-term energy bills and replacement costs. Plus, they’re compact and easier to install in tight spaces. So, even if the initial price is higher, the efficiency and convenience often make it a smarter investment for many households.
Conclusion
So, whether you’re upgrading your bathroom or building a castle in the clouds, these electric tankless heaters are your trusty sidekicks. They offer instant hot water, energy efficiency, and smart features that make modern living a breeze. Just don’t forget to choose one that fits your needs—after all, even a wizard needs the right spell! With these options, you’ll be bathing like royalty in no time.
