If you’re looking for the 15 best electric tankless water heaters in 2026, I’ve got you covered. These models combine high efficiency, compact designs, advanced safety features, and smart controls for reliable hot water on demand. From Rheem’s powerful units to EcoSmart’s space-saving options, there’s something for every household need. Want to find out which one fits your space and budget? Keep going, and I’ll share more details on top choices.
Key Takeaways
- Top models feature high efficiency (98%+), ensuring cost savings and eco-friendly operation through advanced self-modulation technology.
- Compact, space-saving designs with digital controls and WiFi connectivity offer convenient remote management and precise temperature control.
- Flow rates up to 5.9 GPM support household and point-of-use applications, suitable for kitchens, bathrooms, and small households.
- Safety features like leak detection, overload protection, and waterproof ratings ensure reliable, long-term operation.
- Popular brands include Rheem, EcoSmart, Westinghouse, and ThermoMate, known for durability, performance, and innovative features in 2026.
More Details on Our Top Picks
Rheem 18kW 240V Tankless Electric Water Heater Gray
The Rheem 18kW 240V Tankless Electric Water Heater is an excellent choice for homeowners who need reliable, energy-efficient hot water on demand. Its advanced self-modulation technology adjusts power use based on your hot water needs, ensuring efficiency. The digital thermostatic control and LED display let you set and monitor water temperature within ±1 degree for precision. Durable copper immersion heating elements are field serviceable, making maintenance straightforward. Supporting flow rates up to 4.4 GPM, it’s easy to install with bottom 3/4 inch NPT connections. Its compact design combines performance with user-friendly operation, making it a versatile and dependable upgrade for your home.
- Power Range:18kW
- Voltage:240V
- Flow Rate Capacity:4.4 GPM
- Digital Display:Yes
- Safety Features:Overheat, leakage protection
- Mounting Type:Wall-mounted (bottom connections)
- Additional Feature:Self-modulation technology
- Additional Feature:External digital thermostat
- Additional Feature:Copper immersion heating elements
EcoSmart ECO 11 Tankless Water Heater 13KW
Looking for an efficient, space-saving solution to your hot water needs? The EcoSmart ECO 11 Tankless Water Heater 13KW offers endless hot water on demand with precise temperature control within one degree. Its self-modulating technology adjusts power based on demand, maximizing efficiency. Compact at just 11.5 by 8 by 3.75 inches, it’s perfect for wall or point-of-use installation. Suitable for single or low-flow applications, it heats water from 80°F to 140°F, supporting up to 3.1 GPM in warmer climates. With a 99% thermal efficiency and a lifetime warranty on key components, it’s an excellent choice for space-conscious homes.
- Power Range:13kW
- Voltage:240V
- Flow Rate Capacity:3.1 GPM
- Digital Display:Yes
- Safety Features:Leak detection, overheat, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:Patented self-modulating tech
- Additional Feature:Digital temperature control
- Additional Feature:Watersense certified
Electric Tankless Water Heater with Digital Display
If you need a compact, easy-to-read hot water solution for small spaces, an electric tankless water heater with a digital display is an excellent choice. It’s a 110V, 3000W unit that provides instant hot water, perfect for kitchens, bathrooms, RVs, or camping. Made with durable stainless steel and ABS, it offers advanced technology for no preheating, delivering hot water within seconds. The LED display shows temperature and status clearly, with adjustable settings in Fahrenheit or Celsius. It boasts up to 98% thermal efficiency, ensuring energy savings, and includes safety features like waterproofing, leakage protection, and automatic shutoff, making it reliable and safe.
- Power Range:3000W
- Voltage:120V
- Flow Rate Capacity:0.3 GPM
- Digital Display:Yes
- Safety Features:Leakage, dry-boil, overheating
- Mounting Type:Wall-mounted
- Additional Feature:No preheating needed
- Additional Feature:Waterproof IPX4 rating
- Additional Feature:Suitable for vertical installation
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater Gray
For homeowners seeking an energy-efficient, space-saving hot water solution, the Rheem RTEX-24 stands out with its compact design and high performance. It’s 93% smaller than traditional units, saving valuable space while eliminating standby heat loss. With a flow rate of up to 5.9 gallons per minute and adjustable temperatures from 80°F to 140°F, it’s suitable for whole-home use or point-of-use applications. Rated at 99.8% efficiency, this model operates solely on electricity and features a user-friendly LED display for precise control. Its durable build, wall-mount design, and reliable performance make it a top choice for modern households.
- Power Range:24kW
- Voltage:240V
- Flow Rate Capacity:5.9 GPM
- Digital Display:Yes
- Safety Features:Overheat, leakage, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:Compact size savings
- Additional Feature:LED display & dial
- Additional Feature:99.8% energy efficiency
Rheem 11kW 240V Tankless Electric Water Heater
The Rheem 11kW 240V Tankless Electric Water Heater stands out as an ideal choice for households seeking a compact, energy-efficient solution for point-of-use hot water needs. Its small size—90% smaller than traditional tanks—fits easily under sinks or in tight spaces, saving valuable room. Operating on 240 volts with a flow rate of 2.68 GPM, it provides continuous hot water on demand. Features like self-modulating power control, adjustable digital temperature, and an LED display make it user-friendly. With high efficiency (99.8%) and simple wall mounting, this durable unit is perfect for delivering reliable, on-demand hot water while reducing energy costs.
- Power Range:11kW
- Voltage:240V
- Flow Rate Capacity:2.68 GPM
- Digital Display:Yes
- Safety Features:Overheat, leakage, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:Digital temperature display
- Additional Feature:Sleek, space-saving design
- Additional Feature:High durability build
Tankless Electric Water Heater with Digital Touch Screen
A tankless electric water heater with a digital touch screen offers precise temperature control and user-friendly operation, making it ideal for those seeking convenience and reliability. Operating at 240V and 6000W, it’s perfect for point-of-use spots like kitchens, bathrooms, or RVs. The digital display allows easy adjustment within a range of 82-131°F. Compact and wall-mounted, it weighs only 2 pounds, saving space. Built with durable materials like a cast aluminum heating element, it minimizes limescale and corrosion. Safety features ensure trustworthy operation, including overheating and leakage protection. It’s a smart choice for instant hot water with energy efficiency and simple, intuitive control.
- Power Range:6000W
- Voltage:120V
- Flow Rate Capacity:0.5 GPM
- Digital Display:Yes
- Safety Features:Leakage, overheat, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:Touch screen controls
- Additional Feature:Stainless steel water tube
- Additional Feature:Overheat & leakage protection
Westinghouse 14kW WiFi Tankless Water Heater Alexa Compatible
If you’re looking for a compact, smart-enabled water heater that fits seamlessly into your home or office, the Westinghouse 14kW WiFi Tankless Water Heater stands out. This unit is compatible with Alexa and Google Home, allowing you to control the temperature remotely via smartphone or voice commands. It measures just 14.2 inches high, making it perfect for space-constrained areas. With a flow rate of up to 3.38 GPM, it can handle hot water for a shower and sink simultaneously. Its safety features, including four-layer protection, ensure durability and peace of mind. Overall, it’s an efficient, modern choice for on-demand hot water.
- Power Range:14kW
- Voltage:240V
- Flow Rate Capacity:3.38 GPM
- Digital Display:Yes
- Safety Features:Leakage, overheat, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:WiFi app control
- Additional Feature:Alexa & Google compatible
- Additional Feature:Four-layer safety protection
SIVUATEK 14kW Electric Tankless Water Heater
For anyone seeking reliable, on-demand hot water in small spaces, the SIVUATEK 14kW Electric Tankless Water Heater stands out as an excellent choice. Its compact, shoe box-sized design makes installation near showers or washing machines straightforward, reducing water and energy waste. With a powerful 14kW heating system, it instantly heats water to about 110℉, even with fluctuating flow. The digital display and touch controls make temperature adjustments simple, while safety features like leakage detection and overheat protection ensure peace of mind. Easy to install and highly efficient—up to 98%—this unit delivers consistent hot water whenever you need it.
- Power Range:14kW
- Voltage:240V
- Flow Rate Capacity:4.3 GPM
- Digital Display:Yes
- Safety Features:Overheat, leakage, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:Compact shoe box size
- Additional Feature:Cast aluminum heating element
- Additional Feature:Multiple safety protections
14kW Electric Tankless Water Heater with Digital Display
The 14kW electric tankless water heater with a digital display stands out as an excellent choice for homeowners seeking precise temperature control and reliable on-demand hot water. It operates on 240V and requires a 60AMP two-pole breaker, with a compact design that fits easily into most spaces. The LED digital display with soft lighting allows effortless temperature adjustments from 86°F to 140°F. It supports up to 3.38 GPM, ideal for 2-3 points of use simultaneously. Built-in safety features like leakage detection and over-temperature protection ensure peace of mind. Certified by ETL, it combines efficiency, safety, and ease of installation for modern homes.
- Power Range:14kW
- Voltage:240V
- Flow Rate Capacity:3.38 GPM
- Digital Display:Yes
- Safety Features:Leakage, overheat, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:Stable, instant hot water
- Additional Feature:Water-electricity separation
- Additional Feature:Factory tested safety
GEN II Ranein Tankless Water Heater 4.3 GPM
Designed for households that demand reliable, instant hot water, the GEN II Ranein Tankless Water Heater delivers a flow rate of up to 4.3 GPM, making it ideal for 2–3 water points without preheating. Its compact size (13.8 × 3.1 × 18.7 inches) fits easily in tight spaces, and the on-demand heating ensures continuous hot water with 99% efficiency. The intuitive LED display and control knob allow precise temperature adjustments from 86°F to 131°F. With safety features like leakage protection and overheat safeguards, this model offers a dependable, energy-efficient solution perfect for small households seeking immediate hot water availability.
- Power Range:18kW
- Voltage:240V
- Flow Rate Capacity:4.3 GPM
- Digital Display:Yes
- Safety Features:Leakage, overheat, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:4.3 GPM flow rate
- Additional Feature:Anti-scale cast aluminum
- Additional Feature:High thermal efficiency
ThermoMate 3500W Tankless Electric Water Heater
If you’re looking for a compact and efficient solution for small hot water needs, the ThermoMate 3500W Tankless Electric Water Heater stands out. Its 3500W power heats water instantly within a temperature range of 86°F to 131°F, with a flow rate of 0.4 to 0.66 GPM. The self-modulating system adjusts power based on flow and temperature, preventing overheating. Made with durable cast aluminum and SUS 304 stainless steel, it resists scale and corrosion. The sleek size (7.9 x 6.4 x 2.5 inches) fits tight spaces. Easy to install with standard fittings, it’s ideal for sinks, bathrooms, or small commercial use.
- Power Range:3500W
- Voltage:120V
- Flow Rate Capacity:0.66 GPM
- Digital Display:Yes
- Safety Features:Leakage, overheat, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:SUS 304 stainless steel
- Additional Feature:Easy wall mounting
- Additional Feature:ETL safety certification
APUS 27kW Tankless Electric Water Heater
For homeowners seeking reliable, on-demand hot water with energy efficiency, the APUS 27kW Tankless Electric Water Heater stands out as an excellent choice. It delivers continuous hot water at up to 6.5 GPM, perfect for multiple simultaneous uses like showers and sinks. The advanced cast aluminum heating element heats water quickly and efficiently, with no preheating delays. Its LED display allows precise temperature control from 86°F to 140°F, and the self-modulating technology optimizes energy use. Compact and easy to install, it fits tight spaces and offers high efficiency with 99.8% thermal efficiency, making it ideal for whole-house or point-of-use applications.
- Power Range:27kW
- Voltage:240V
- Flow Rate Capacity:6.5 GPM
- Digital Display:Yes
- Safety Features:Leakage, overheat, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:6.5 GPM capacity
- Additional Feature:Memory temperature function
- Additional Feature:Eco-friendly design
18kW Tankless Water Heater with WiFi Control
The 18kW Tankless Water Heater with WiFi Control stands out for its seamless remote management, making it an excellent choice for homeowners who want precise temperature adjustments from anywhere. It operates on 240V with a flow rate of 4.3 GPM, providing instant hot water for the whole house. Its compact design fits easily on walls, saving space. The LED display allows temperature setting up to 140°F, and WiFi connectivity enables remote control. With self-regulating technology, it guarantees stable water temperature and energy savings of up to 99%. Safety features like overheat and leak protection, plus ETL certification, make it a reliable, efficient, and user-friendly option.
- Power Range:18kW
- Voltage:240V
- Flow Rate Capacity:4.3 GPM
- Digital Display:Yes
- Safety Features:Leakage, overheat, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:WiFi remote control
- Additional Feature:Self-regulating technology
- Additional Feature:ETL safety standard
Tankless Electric Water Heater with Digital Display
A tankless electric water heater with a digital display stands out as an ideal choice for anyone seeking precise temperature control and easy monitoring. I find its LED display incredibly helpful for quick, at-a-glance temperature adjustments. With a powerful 3000W output, it heats water rapidly, raising temperatures by about 82°F to 131°F in seconds, perfect for small sinks or RVs. Its compact, sleek design fits well in tight spaces, and safety features like overload protection and waterproof ratings assure peace of mind. Easy to install and operate, this model is great for those who want reliable, on-demand hot water with straightforward controls.
- Power Range:3000W
- Voltage:120V
- Flow Rate Capacity:0.5 GPM
- Digital Display:Yes
- Safety Features:Leakage, overheat, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:Ultra-thin, compact design
- Additional Feature:Waterproof IPX4 rated
- Additional Feature:Digital temperature in 1° steps
Electric Tankless Water Heater with WiFi Control
If you value remote control and precise temperature adjustments, electric tankless water heaters with WiFi connectivity are an ideal choice. I recommend the WINTEMP 27kW model, which delivers up to 6.5 gallons per minute and can handle multiple outlets. Its compact design fits well in tight spaces, and the LED display makes monitoring easy. With WiFi control, you can adjust settings remotely, ensuring hot water comfort at all times. Plus, it’s safety-certified with leak detection and overheat protection. This heater automatically optimizes energy use, saving up to 99% compared to traditional models. It’s perfect for modern homes seeking convenience, efficiency, and reliable hot water.
- Power Range:27kW
- Voltage:240V
- Flow Rate Capacity:6.5 GPM
- Digital Display:Yes
- Safety Features:Leakage, overheat, dry-fire
- Mounting Type:Wall-mounted
- Additional Feature:6.5 GPM flow rate
- Additional Feature:Eco-friendly, low power
- Additional Feature:2-year warranty included
Factors to Consider When Choosing a Tankless Water Heater Electric
When selecting an electric tankless water heater, I consider factors like heating capacity to meet my household’s needs and whether the unit fits in my space. I also check if my power supply can handle the unit’s requirements and look for features that allow precise temperature control. Finally, I think about installation ease and ongoing maintenance to guarantee long-term reliability.
Heating Capacity Needs
Choosing the right tankless water heater electric depends largely on understanding your household’s heating capacity needs. First, determine the total flow rate by adding up the GPM requirements for all fixtures that might run simultaneously, like showers and sinks. Match the heater’s maximum flow rate to your peak hot water demand to ensure it can handle busy periods. Keep in mind that colder inlet water temperatures require higher wattage units to reach your desired output temperature. Assess the heater’s heating capacity in kilowatts (kW), making sure it can warm water quickly enough for your usage patterns. To future-proof your purchase, select a unit with a capacity at least 20% above your maximum demand, accommodating unexpected spikes or additional fixtures.
Space and Size Fit
Evaluating the space and size of a tankless water heater electric is essential to guarantee it fits seamlessly into your home. First, measure the available space, considering height, width, and depth, to ensure a proper fit. Check the unit’s dimensions carefully and compare them to your designated installation area. If space is limited, choose a compact, wall-mounted model to maximize usability without sacrificing performance. Also, confirm there’s enough clearance around the unit for maintenance, ventilation, and safe operation. Lastly, consider the heater’s size relative to your household’s hot water needs. Selecting a unit that fits physically and meets your demand will help avoid installation issues and ensure reliable performance. Proper sizing guarantees both convenience and efficiency in your home.
Power Supply Compatibility
Ensuring your home’s electrical system can support a new tankless water heater is essential for safe and efficient operation. Check that your electrical supply provides the required voltage, usually 240V, and sufficient amperage, often between 30-60A. Verify that your circuit breakers and wiring are compatible with the heater’s power demands to avoid overloads or hazards. High-power units, especially those rated above 18kW, may need dedicated circuits to operate correctly. It’s also important to confirm you have the appropriate wiring gauge, such as 8/2 AWG or 10 AWG, matching the heater’s current requirements. Finally, assess whether your electrical panel has enough capacity to support the added load without affecting other appliances or systems, ensuring everything runs smoothly and safely.
Temperature Control Features
When selecting a tankless water heater, paying attention to temperature control features can make a significant difference in your daily comfort and safety. Precise controls like digital displays and adjustable thermostats let you set water temperatures within a narrow range, usually ±1°F, ensuring consistent comfort. Self-modulating technology automatically adjusts power to maintain stable temperatures despite fluctuations in flow or inlet water temperature. Many models let you choose temperature settings in either Fahrenheit or Celsius, accommodating user preferences. Advanced units may include remote or WiFi-enabled controls, allowing you to adjust settings via smartphone or voice commands for added convenience. Overtemperature protection features are also crucial, as they prevent scalding by automatically shutting off or limiting heat when water reaches unsafe temperatures.
Installation and Maintenance
Choosing the right tankless water heater involves more than just picking a model with the right features; proper installation and ongoing maintenance are key to keeping it running smoothly. I recommend guaranteeing your electrical system can support the unit’s voltage and amperage, like 240V and 40A double-pole breakers. Regular flushing is essential, especially in hard water areas, to prevent mineral buildup that can reduce efficiency and lifespan. Access to service ports and easy removal of heating elements make routine maintenance and repairs straightforward. It’s also important to double-check water connections and wiring to avoid leaks, shorts, or system failures down the line. Finally, inspect safety features such as leakage protection and overheat shutoff periodically to ensure safe, reliable operation.
Energy Efficiency Ratings
Energy efficiency ratings are a crucial factor to contemplate because they directly impact how well a tankless electric water heater converts electrical energy into heat. A higher rating means less energy is wasted, making your system more cost-effective and environmentally friendly. Look for models with efficiency ratings of 98% or higher to ensure minimal energy loss during operation. These ratings are expressed as a percentage, showing how much electrical energy is transformed into heat for your water. Many efficient units feature self-modulating technology that adjusts power usage based on demand, enhancing overall performance. Choosing a heater with a high efficiency rating not only cuts your electricity bills but also reduces your carbon footprint over its lifespan. It’s a smart investment for both your wallet and the environment.
Frequently Asked Questions
How Do I Calculate the Right kW Size for My Household Needs?
To find the right kW size for my household, I start by estimating my peak hot water usage, like showers and appliances. I then calculate the total flow rate needed and check each fixture’s temperature rise. I add these up, considering future needs, and select a unit that provides enough power—usually around 27-36 kW for most households. This ensures I get hot water without overloading my system.
What Maintenance Is Required for Electric Tankless Water Heaters?
You might be surprised, but maintaining your electric tankless water heater is simpler than you think. I check the filters regularly to prevent mineral buildup, flush the system annually to remove scale, and inspect the heating elements for wear. Staying on top of these small tasks keeps it running efficiently and extends its lifespan. Trust me, a little maintenance now saves you from costly repairs later!
Can These Models Be Installed Outdoors Safely?
Yes, many electric tankless water heater models can be installed outdoors safely, but you should check the manufacturer’s specifications first. I recommend choosing models specifically rated for outdoor use, as they’re built to withstand weather conditions. Proper installation includes protecting electrical connections from moisture and ensuring proper ventilation. If you’re unsure, consulting a professional installer helps guarantee safe outdoor setup and ideal performance.
How Does Wifi Control Improve Water Heater Management?
Wi-Fi control lets me manage my water heater remotely, so I can turn it on or off from anywhere using my smartphone. It also provides real-time status updates, alerts for maintenance issues, and customizable temperature settings. This makes it easier to save energy, prevent running out of hot water unexpectedly, and troubleshoot problems quickly. Overall, Wi-Fi control adds convenience, efficiency, and peace of mind to managing my water heating system.
What Are the Energy Efficiency Differences Among These Models?
The energy efficiency differences among these models mainly come down to their energy factor (EF) ratings. Higher EF means better efficiency, so I look for models with EF above 0.9. Some models use advanced insulation or smart controls to reduce energy waste. I prefer units with high EF and energy-saving features because they save me money on my electric bill and are better for the environment.
Conclusion
Choosing the right tankless electric water heater is like finding the perfect key for a lock — it fits just right and makes everything run smoothly. I once installed a model that saved me from cold showers during peak hours, proving that the right choice transforms your daily routine. Remember, considering your home’s demand and features guarantees a seamless hot water experience. With the right model, you’ll never have to worry about running out of hot water again.
