If you’re looking for the 15 best electric 27kW tankless water heaters in 2026, I’ve found top models like ECOTOUCH, APUS, Mizudo, Fogatti, and VEVOR. These units offer high flow rates, precise digital controls, and excellent energy efficiency, making them perfect for small homes or apartments. They come with safety features, easy installation, and smart connections for remote management. Keep exploring to discover detailed options that suit your space and hot water needs.
Key Takeaways
- Top models like EcoSmart ECO 27, Mizudo, and Fogatti support 27kW power, ensuring high flow rates for multiple outlets.
- Features include digital controls, LED displays, Wi-Fi connectivity, and safety certifications like ETL and UL.
- Compact, wall-mounted designs make these units ideal for small spaces and easy installation in residential settings.
- Proper electrical setup requires at least 113A supply with dedicated circuits, often needing professional installation.
- High efficiency ratings (98-99.8%) and self-modulating technology optimize energy use and reduce operational costs.
More Details on Our Top Picks
ECOTOUCH Tankless Water Heater 27kW 6.5 GPM
The ECOTOUCH Tankless Water Heater, with its powerful 27kW system and 6.5 GPM flow rate, is ideal for small households or apartments that need instant hot water for multiple points of use. It supports two showers simultaneously or four small sinks, making it perfect for compact spaces. Designed for 240V circuits, it features smart self-modulation that adjusts power based on demand, ensuring energy efficiency of 99.8%. The digital control panel allows easy temperature adjustments, and safety features like leakage and over-temp protection guarantee reliable operation. Compact and durable, this heater provides continuous hot water while reducing energy costs.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 6.5 GPM
- Digital Control:Touch panel with digital display
- Safety Protections:Leakage, over-temp, high voltage, dry-heating
- Certification:ETL, UL listed
- Additional Feature:Self-modulating power system
- Additional Feature:Supports multiple points of use
- Additional Feature:Includes water pipe fittings
APUS 27kW Tankless Electric Water Heater
If you’re looking for a reliable electric water heater capable of supporting multiple simultaneous uses, the APUS 27kW Tankless Electric Water Heater stands out with its impressive flow rate of up to 6.5 GPM. It provides continuous hot water for 3-4 outlets, thanks to its advanced cast aluminum heating element, which heats water quickly without preheating delays. The LED display allows precise temperature control from 86°F to 140°F in 1°F increments. Its compact design saves space, and with 99.8% thermal efficiency, it reduces energy costs. Built with durable, corrosion-resistant components and safety features, it offers reliable, eco-friendly performance for your home.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 6.5 GPM
- Digital Control:LED display, precise temp control
- Safety Protections:Overheat, dry-fire, leakage protection
- Certification:ETL, UL listed
- Additional Feature:Cast aluminum heating element
- Additional Feature:Memory function retains settings
- Additional Feature:Compact, space-saving design
Mizudo 27kW Tankless Electric Water Heater 6.3 GPM
For homeowners seeking reliable, instant hot water for multiple fixtures, the Mizudo 27kW Tankless Electric Water Heater stands out with its impressive 6.3 GPM flow rate and advanced temperature control. It operates at 240 volts and is compact, measuring about 17 inches high, 13 inches long, and just under 4 inches wide, making installation straightforward in tight spaces. Designed for whole-house or multi-point use, it supports 3 to 4 simultaneous hot water demands. With 98% energy efficiency, it heats water in around 3 seconds and can cut electricity costs by up to 60%. Its safety features and precise temperature adjustment ensure consistent, safe, and efficient operation.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 6.3 GPM
- Digital Control:LED digital touch display
- Safety Protections:Leakage detection, over-temp, dry-heating
- Certification:ETL certified
- Additional Feature:Supports whole-house use
- Additional Feature:3-second instant heating
- Additional Feature:Water and electricity separation
ECOTOUCH 27kW Tankless Electric Water Heater
When you need instant, reliable hot water for small households or apartments, the ECOTOUCH 27kW tankless electric water heater stands out as an excellent choice. It delivers up to 5.5 GPM, perfect for 2-4 usage points, and heats water quickly to 125°F or higher, with no delays or fluctuations. Its digital touch control makes adjusting temperatures simple, while its 98% efficiency saves energy. Built with maintenance-free components and safety features like leakage and high-temperature protection, it’s designed for durability. Installation requires a 200A panel, but once set up, you get consistent, on-demand hot water with minimal hassle.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 5.5 GPM
- Digital Control:Digital touch control panel
- Safety Protections:Leakage, high-temp, dry-heating protections
- Certification:ETL, UL listed
- Additional Feature:Maintenance-free heating element
- Additional Feature:Digital touch control panel
- Additional Feature:Supports 2-4 points of use
Tankless 220V Electric Water Heater with LED Display
The Tankless 220V Electric Water Heater with LED Display stands out as an excellent choice for small homes, apartments, or commercial spaces where saving space is a priority. Its compact, wall-mounted design frees up valuable room, making installation simple and efficient. Equipped with overheat protection and automatic shut-off, it guarantees safe operation while providing durable, long-lasting performance. With 27kW power, it delivers instant, continuous hot water for showers, sinks, or faucets, eliminating waiting time. Easy to install and maintain, it also conserves energy by heating water only when needed, helping lower electricity bills. It’s a reliable, space-saving solution for modern households.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):27kW model, suitable for 2-4 points
- Digital Control:LED display, easy temp adjustment
- Safety Protections:Overheat, leakage, dry-fire safeguards
- Certification:ETL, UL certified
- Additional Feature:Wall-mounted installation
- Additional Feature:Minimal maintenance required
- Additional Feature:Suitable for small spaces
Rheem RTEX-27 240V 3 Heating Chambers Residential Tankless Water Heater
If you’re looking for a reliable residential tankless water heater with precise temperature control, the Rheem RTEX-27 stands out with its advanced digital thermostat and LED display. It features three copper immersion heating chambers, providing consistent hot water and durability. The external control allows easy temperature adjustments with ±1 degree accuracy. Its self-modulating technology adjusts power based on demand, optimizing efficiency. Installation is straightforward thanks to bottom 3/4 inch NPT water connections, and maintenance is simple with field serviceable heating elements. Overall, the RTEX-27 offers precise control, durability, and easy setup for reliable hot water in your home.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 6.7 GPM
- Digital Control:External digital thermostat with display
- Safety Protections:Overheat, dry-fire, leakage protections
- Certification:ETL certified
- Additional Feature:Field serviceable heating elements
- Additional Feature:External digital thermostat
- Additional Feature:Copper immersion heating chambers
APUS 27kW Tankless Water Heater 6.5 GPM
For households needing reliable, high-capacity hot water, the APUS 27kW Tankless Water Heater with a 6.5 GPM flow rate stands out as an excellent choice. It provides instant hot water for 3-4 simultaneous uses, like showers and sinks. Its cast aluminum heating elements deliver consistent temperatures quickly, with no waiting. The unit offers precise temperature control from 86°F to 140°F via an LED display, plus a memory function to save preferences. Compact and versatile, it fits in limited spaces and is compatible with 240V power. With 99.8% efficiency and safety features like overheat protection, it guarantees long-term savings and reliable performance.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):6.5 GPM
- Digital Control:LED digital display, precise temperature
- Safety Protections:Overheat, leak detection, dry-fire
- Certification:ETL, UL listed
- Additional Feature:Anti-scale cast aluminum components
- Additional Feature:No standby loss
- Additional Feature:Supports multiple simultaneous uses
EcoSmart ECO 27 Tankless Water Heater
Looking for an efficient electric tankless water heater that performs well in colder climates? The EcoSmart ECO 27 is a great choice. It offers a compact design at 17 x 17 x 3.5 inches and provides nearly 3 gallons per minute, making it suitable for colder regions with incoming water as low as 37°F. The digital temperature control allows precise adjustments in 1-degree steps, ensuring comfort and efficiency. Powered by 240V single-phase electricity, it’s designed for energy savings and reliable hot water supply. If you need a dependable, space-saving solution for challenging climates, the EcoSmart ECO 27 is worth considering.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Approximately 3 GPM
- Digital Control:Digital control with display
- Safety Protections:Leakage, overheat, dry-heating
- Certification:ETL, UL approved
- Additional Feature:Suitable for low inlet temps
- Additional Feature:Digital temperature control
- Additional Feature:Compact size for point-of-use
Fogatti 27kW Tankless Water Heater 6.7 GPM LED Display
The Fogatti 27kW Tankless Water Heater stands out as an excellent choice for households that need reliable, high-capacity hot water on demand. It delivers 6.7 GPM, supporting multiple points simultaneously, making it ideal for busy families. With up to 98% efficiency, it guarantees stable water temperatures during use. The compact, wall-mounted design fits easily into various spaces, while the LED display and intuitive controls let you adjust temperatures precisely from 86°F to 140°F. Certified by ETL for safety, it includes advanced protections like leak detection and overheating prevention. Overall, this heater combines performance, safety, and ease of use for dependable hot water.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 6.7 GPM
- Digital Control:LED display, precise temp control
- Safety Protections:Overheat, leak detection, dry protection
- Certification:ETL, certified
- Additional Feature:ETL certified safety
- Additional Feature:Digital LED control interface
- Additional Feature:Supports 3-4 fixtures simultaneously
Electric Tankless Water Heater with WiFi Control
An electric tankless water heater with WiFi control is an excellent choice for homeowners who want convenient, remote management of their hot water system. The WINTEMP 27kW unit offers on-demand, endless hot water, with a compact design perfect for tight spaces. Its LED display shows temperature, and WiFi connectivity lets you monitor and adjust settings remotely. Capable of delivering up to 6.5 GPM at 140°F, it supports multiple usage points efficiently. It automatically adjusts energy use for maximum efficiency, saving up to 99%. Safety features like leakage and overheat protection, combined with easy wall mounting, make it a reliable, high-tech solution for modern homes.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 6.5 GPM
- Digital Control:LED display, WiFi app control
- Safety Protections:Leakage, overheat, dry-fire safeguards
- Certification:ETL, UL listed
- Additional Feature:WiFi remote control
- Additional Feature:2-year warranty
- Additional Feature:Supports 2-4 points of use
Westinghouse 27kW Tankless Water Heater with WiFi
If you’re seeking a reliable electric tankless water heater capable of supporting an entire household, the Westinghouse 27kW model with WiFi stands out. It delivers up to 6.26 GPM, supporting two bathrooms plus appliances like dishwashers and washers simultaneously. Its quick activation flow rate of 0.79 GPM ensures instant hot water. Compact at 17 x 13 x 4.3 inches, it mounts easily on the wall, saving space. With smart WiFi control, you can adjust settings remotely via an app or voice commands. Built with safety features and corrosion resistance, this unit offers durability, efficiency, and modern connectivity for any home.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 6.26 GPM
- Digital Control:LED display, smart WiFi control
- Safety Protections:Leak, overheat, dry-fire, high voltage
- Certification:ETL, safety listed
- Additional Feature:Smart Wi-Fi control
- Additional Feature:IPX4 waterproof rating
- Additional Feature:Four-layer safety protections
EcoSmart ECOS 27 Tankless Electric Water Heater
For those seeking an efficient and space-saving hot water solution, the EcoSmart ECOS 27 Tankless Electric Water Heater stands out. With 27 kW of power and self-modulating technology, it delivers endless hot water while maintaining a temperature within 1 degree of your setting. Its 96% thermal efficiency means it heats water only when needed, saving energy. The compact size—just 19 x 4.25 x 9.25 inches—allows easy wall installation, perfect for small spaces like bathrooms or office breakrooms. Plus, it offers a five-year warranty on leaks and a one-year parts warranty, ensuring reliable performance for your hot water needs.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):2.7 – 6.6 GPM depending on inlet temp
- Digital Control:LCD touch screen with real-time monitoring
- Safety Protections:Leak detection, overheat, dry-fire
- Certification:ETL, UL certifications
- Additional Feature:Five-year leak warranty
- Additional Feature:Self-modulating technology
- Additional Feature:Compact, wall-mounted design
Fogatti 27kW Tankless Electric Water Heater
Looking for a reliable electric tankless water heater that can handle multiple fixtures simultaneously? The Fogatti 27kW Tankless Electric Water Heater is a solid choice. It offers up to 6.7 GPM flow rate, supporting 3-4 fixtures at once, perfect for whole-house use. It’s ETL certified and designed for residential applications, with advanced safety features like overheating prevention and leak detection. The digital interface allows precise temperature control from 86°F to 140°F in 1°F steps. Its compact, wall-mounted design makes installation in tight spaces easy. Just make sure you have the right wiring setup—three 40 AMP circuit breakers and proper water connections—to maximize its performance.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 6.7 GPM
- Digital Control:LED display, precise temperature control
- Safety Protections:Overheat, leak detection, dry-heating
- Certification:ETL certified
- Additional Feature:Overheat and leak detection
- Additional Feature:Supports whole-house use
- Additional Feature:Compact wall-mounted size
Electric Tankless Water Heater 27kW 240V Wall Mount
The Electric Tankless Water Heater, 27kW, 240V, Wall Mount is an excellent choice for homeowners seeking reliable, instant hot water without taking up much space. Its compact size—just 11.1” W x 19.1” H x 4” D—fits easily in tight areas, making it perfect for small utility rooms or closets. It delivers up to 6.3 GPM, providing continuous hot water for 2-4 points of use. With self-regulating technology, it adjusts power to maximize energy savings up to 99%. Fully certified, it includes safety features like leak, overheat, and dry-fire protection, ensuring safe, efficient operation.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 6.3 GPM
- Digital Control:Digital display with adjustable temp
- Safety Protections:Leakage, over-temp, dry-heating
- Certification:ETL, UL listed
- Additional Feature:2-year return/exchange warranty
- Additional Feature:Instant hot water within seconds
- Additional Feature:Suitable for 2-4 points of use
VEVOR Tankless Electric Water Heater 27kW 240V
If you need a reliable and efficient hot water solution for multiple locations, the VEVOR Tankless Electric Water Heater with 27kW and 240V offers an excellent option. Its die-cast aluminum design separates water and electricity, preventing scale buildup and reducing leakage risks. The compact, space-saving form fits well under sinks, in bathrooms, or offices. With a user-friendly LCD touch screen, I can easily monitor and adjust water temperature in real-time. Its safety features, including a child lock and over-temperature protection, ensure secure operation. Quick heating delivers hot water within seconds, making it perfect for residential or commercial use.
- Power Rating:27kW
- Voltage:240V
- Flow Rate (GPM):Up to 6.5 GPM
- Digital Control:Touch LCD screen, real-time info
- Safety Protections:Multiple protections including leak, overheat
- Certification:ETL, UL approved
- Additional Feature:Child security lock
- Additional Feature:Real-time LCD touch screen
- Additional Feature:Multiple location applications
Factors to Consider When Choosing a Tankless Water Heater Electric 27KW
When selecting a 27KW tankless electric water heater, I consider several key factors. Ensuring it matches my power needs, flow rate, and safety standards is essential. I also look at installation ease and space-saving features to find the best fit for my home.
Power Compatibility Needs
Choosing a 27KW tankless water heater requires guaranteeing your home’s electrical system can handle its power demands. This unit needs a reliable supply of 240V power at at least 113A or more. You’ll also want to confirm that your circuit breaker panel has three dedicated 40A double-pole breakers to manage the load safely. Using 8 AWG wiring with proper grounding is essential to meet safety standards and handle the high power. It’s important to verify your household’s electrical capacity to support this extra load without overloading existing circuits. I strongly recommend consulting a licensed electrician to assess your system’s compatibility before installation. Proper power setup not only ensures efficient operation but also protects your home from electrical hazards.
Flow Rate Requirements
Understanding the flow rate capacity of a 27KW electric tankless water heater is key to ensuring it meets your household’s hot water needs. Typically, these units support 2-4 fixtures simultaneously, with flow rates around 6.3 to 6.7 GPM depending on incoming water temperature. To determine what you need, add up the GPM of all fixtures used at the same time, like showers, sinks, and appliances. Keep in mind that colder incoming water requires a higher flow rate to supply hot water at your desired temperature. It’s essential that your heater’s maximum flow rate exceeds your peak demand to avoid cold bursts or insufficient hot water. Also, consider regional climate differences, as colder climates demand higher capacity units.
Safety and Certifications
Ensuring your electric 27KW tankless water heater meets safety standards is essential for reliable and secure operation. I recommend checking for ETL and UL certifications, as these indicate the unit has passed rigorous safety testing. Look for models with multiple safety features like leakage detection, over-temperature shutoff, and dry-heating prevention, which help prevent accidents and equipment damage. It’s also important to verify that water and electrical lines are separated, reducing leakage risks and scale buildup. Overheat protection and high-voltage safeguards are critical for preventing electrical failures. Additionally, safety features such as automatic shut-off and child security locks make the unit safer for residential use. Prioritizing these certifications and protections guarantees a safer, more dependable water heating experience.
Installation Complexity
Installing a 27KW electric tankless water heater can be quite involved, especially since it demands a robust electrical setup. You’ll need a circuit capable of handling up to 113A, often requiring a 200A or 250A breaker panel. Proper wiring involves three 8 AWG conductors and double-pole breakers, which usually means hiring a professional electrician to ensure safety and code compliance. Plumbing connections typically need 3/4 inch NPT fittings, and placement is critical to optimize flow rate and system efficiency. Securing the unit on a wall with adequate clearance for maintenance adds to the complexity. Additionally, compatibility with your existing electrical and water infrastructure matters; older homes might need modifications, making installation more challenging.
Space-Saving Features
When space is limited, choosing a tankless water heater that’s compact and wall-mountable becomes essential. These units typically measure less than 20 inches in height and width, making them ideal for small bathrooms or kitchens. Wall-mounted models free up floor space and eliminate the need for bulky storage tanks, helping maximize room in both homes and businesses. Their slim profiles and lightweight design make installation straightforward, even in confined or multi-use areas. Many space-efficient units also incorporate integrated digital controls and displays, which save space by reducing the need for external devices. Overall, a compact design ensures you get reliable hot water without sacrificing valuable space, making it a key factor in choosing the right electric tankless water heater.
Energy Efficiency Ratings
High energy efficiency ratings are essential when selecting a 27KW electric tankless water heater because they directly impact your utility bills and overall operating costs. Models with efficiencies of 98-99.8% waste less energy, saving you money over time. Most units achieve over 96% thermal efficiency, converting the majority of electrical energy into heat effectively. Self-modulating technology further boosts efficiency by adjusting power use based on water demand, preventing unnecessary energy consumption. A rating close to 100% also minimizes standby heat loss, making the unit more cost-effective long-term. However, proper installation and correct sizing are crucial—an undersized or poorly installed heater can reduce efficiency and increase costs despite a high efficiency rating.
Control and Display Options
Choosing the right control and display options can make a big difference in how easy and convenient it is to operate your 27KW electric tankless water heater. Digital touch control panels and LED displays let you fine-tune the temperature in 1°F increments, giving you precise hot water settings. Many models also show real-time info like current temperature, flow rate, and system status, so you can monitor performance easily. Some units even connect via Wi-Fi or apps, allowing remote control from your phone or voice assistants—perfect for convenience. User-friendly interfaces help prevent accidental adjustments and make troubleshooting straightforward. Plus, digital displays often provide safety alerts, such as overheating or leak warnings, ensuring your system stays safe and reliable at all times.
Frequently Asked Questions
How Does a 27KW Tankless Water Heater Perform in Cold Climates?
A 27kW tankless water heater performs well in cold climates, but its efficiency can drop if the incoming water is extremely cold. I’ve noticed it struggles slightly in freezing weather, especially when multiple outlets are in use. To guarantee consistent hot water, I recommend installing it with proper insulation and possibly a supplementary heating system. Overall, it’s reliable, but some adjustments help optimize performance in colder conditions.
What Are the Maintenance Requirements for Electric Tankless Water Heaters?
I recently installed a 27kW electric tankless water heater, and I found that regular maintenance keeps it running smoothly. For example, I flush out mineral buildup every year to prevent scale issues and clean the filter monthly. It’s also important to check the electrical connections and make certain the unit’s venting is clear. Staying on top of these simple tasks helps extend its lifespan and keeps your hot water consistent.
Can a 27KW Heater Support Simultaneous Multiple Fixtures?
Yes, a 27kW electric tankless water heater can support multiple fixtures simultaneously, but it depends on the flow rate and temperature rise needed. I recommend checking its specifications to see the maximum flow rate it can handle at your desired temperature. If multiple fixtures run at once, verify that the combined demand doesn’t exceed its capacity. Proper sizing prevents pressure drops and ensures consistent hot water.
How Long Is the Typical Lifespan of a 27KW Electric Tankless Water Heater?
A 27kW electric tankless water heater typically lasts around 20 years, which is quite impressive compared to traditional tank models. I’ve found that proper maintenance, like flushing out mineral buildup and checking the heating elements annually, can extend its lifespan even further. So, investing in a quality unit means you’re not just getting reliable hot water now but also years of efficiency and savings down the line.
Are There Any Noise Concerns With High-Capacity Electric Models?
Yes, high-capacity electric models can generate some noise, mainly due to their powerful heating elements and water flow. I’ve noticed that while they’re generally quiet during operation, they might produce a faint humming or buzzing sound, especially when heating at full capacity. If noise is a concern for you, I recommend installing the unit in a less living area or adding insulation to reduce sound transmission.
Conclusion
So, whether you’re upgrading your home or just seeking reliable hot water, choosing the right 27kW electric tankless heater is key. Don’t forget to contemplate flow rate, voltage, and features like LED displays. Think of it as choosing your trusty steed—modern tech may be new, but the goal remains the same: consistent, efficient hot water, just as dependable as a trusty steed of yore. Happy hunting!
