Best 27 kW Tankless Water Heaters in 2026: 15 Picks Ranked by Specs
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Choosing the best 27 kW tankless water heaters requires matching output to your electrical capacity and fixture needs. The Thermomate 27kW 6.6 GPM Electric Tankless Water Heater leads this list because its 6.6 GPM flow rate supports whole-home multi-fixture demands. We compared 15 models using only the specifications published on their listings. This guide helps you decide which unit fits your home’s electrical panel and hot water usage.
Quick picks
The best fit for you
- You need the highest flow rate for large households NOVIEEX 27kW 7.4 GPM Electric Tankless Water Heater It delivers 7.4 GPM, the highest capacity among the ranked models.
- You want WiFi monitoring for smart home integration WINTEMP 27kW Electric Tankless Water Heater It includes mobile app tracking and remote temperature control capabilities.
- You require the most compact unit for tight spaces VancEpic 27kW Electric Tankless Heater Its 3.19-inch width and 3.19-inch length minimize wall footprint.
- You prefer digital touch screen controls GE 27 kW Touchscreen Tankless Water Heater It features a touchscreen interface for direct on-unit adjustments.
Our 15 picks
Thermomate 27kW 6.6 GPM Electric Tankless Water Heater
Best for: whole-home multi-fixture hot water demands
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 6.6 GPM
- Voltage
- 240 V
- Temperature Control
- 80°F to 140°F
- Certification
- ETL
View on Amazon: Thermomate 27kW 6.6 GPM Electric Tankless Water Heater
The Thermomate 27 kW electric tankless water heater delivers up to 6.6 GPM of continuous hot water at 240 volts. It features an adjustable temperature range of 80°F to 140°F and self-modulating power. Measuring 17.09 by 13.15 by 3.15 inches, it mounts to the wall. This unit suits you if you need to run three to four fixtures simultaneously and have a 150-amp or larger electrical panel.
Pros
- Delivers flow rates up to 6.6 GPM
- Cast aluminum heating block isolates water from electrical elements
- Self-modulating technology adjusts power between 80°F and 140°F
- Compact wall-mounted profile measuring 17.09 x 13.15 x 3.15 inches
- ETL listed with over-temperature cutoff, leakage, and surge protection
Cons
- Requires a 150-amp panel, three 40-amp breakers, and three 8 AWG wire runs
- No wireless connectivity or mobile app controls listed
Good fit if
- You have an electrical panel with at least 150 amps of capacity and space for three 40-amp double-pole breakers.
- You need up to 6.6 GPM to supply multiple fixtures like two showers and a sink simultaneously.
Skip if
- You lack electrical capacity for three separate 40-amp 240V circuits.
- You require integrated Wi-Fi or smartphone control.
Verdict: Thermomate 27 kW Electric Tankless Water Heater delivers 6.6 GPM capacity and isolated cast-aluminum heating for homes with 150-amp electrical service. It provides reliable whole-house output among 15 ranked models in 2026.
SIVUATEK 27kW Electric Tankless Water Heater
Best for: multi-fixture homes with three 40-amp breakers
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Voltage
- 240V
- Temperature Control
- 86°F to 131°F, 1°F increments
- Dimensions
- 15.87 x 11.14 x 2.87 in
- Use
- Whole House
View on Amazon: SIVUATEK 27kW Electric Tankless Water Heater
The SIVUATEK 27 kW Whole House Electric Tankless Water Heater provides on-demand heating for whole-home setups across four to five fixtures. Powered by 240 volts and drawing on three 40-amp breakers, it delivers up to 99.8 percent thermal efficiency. You adjust output from 86°F to 131°F in single-degree increments using the LED screen. This compact wall-mounted unit suits households needing continuous hot water for simultaneous kitchen and bathroom tasks.
Pros
- Temperature adjustment from 86°F to 131°F in 1°F increments
- Thermal efficiency rated up to 99.8%
- Standard 3/4-inch NPT water connections
- Compact 2.87-inch profile fits under-sink or on-wall
- Built-in leakage protection, overheating protection, and auto shut-off
Cons
- Demands electrical service for three 40-amp circuit breakers
- Maximum water temperature caps at 131°F
- No remote control or wireless connectivity listed
Good fit if
- You have panel capacity for three 40-amp 240V circuit breakers.
- You supply four to five fixtures simultaneously across kitchens and bathrooms.
- You want single-degree output control monitored via an LED display.
Skip if
- You require water temperatures higher than 131°F.
- You want remote control or smartphone app integration.
Verdict: SIVUATEK 27 kW Whole House Electric Tankless Water Heater delivers steady 240V multi-point heating with single-degree precision. It offers dependable whole-home capacity if your electrical panel accommodates three 40-amp breakers.
NOVIEEX 27kW 7.4 GPM Electric Tankless Water Heater
Best for: large households needing high multi-fixture flow rates
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 7.4 GPM
- Installation Location
- Indoor
- Voltage
- 240V
- Temperature Control
- 77°F to 140°F, 1°F increments
View on Amazon: NOVIEEX 27kW 7.4 GPM Electric Tankless Water Heater
The NOVIEEX 27 kW Electric Tankless Water Heater is an indoor whole-house unit engineered for multi-point demand. It delivers a maximum flow rate of 7.4 GPM at 240 volts, allowing you to run three to four fixtures simultaneously. Temperature adjusts from 77°F to 140°F in 1°F increments via a digital LED screen. It suits larger households that require high simultaneous flow and possess the electrical capacity for a 112.5-amp load.
Pros
- High maximum flow rate of up to 7.4 GPM
- Wide temperature range from 77°F to 140°F in 1°F increments
- Standard 3/4-inch NPT water connections
- Slim 3.18-inch depth with IPX4 water resistance rating
Cons
- Demanding electrical requirement of three 40A double-pole breakers
- Requires three runs of 8 AWG wiring
- Limited to a one-year warranty
Good fit if
- You need to supply up to four plumbing fixtures at the same time.
- You have panel capacity for three 40-amp double-pole breakers.
- You want precise temperature control down to single-degree increments.
Skip if
- You cannot accommodate a 112.5-amp draw or three 8 AWG wire sets.
- You require a warranty coverage period longer than one year.
Verdict: NOVIEEX 27 kW Electric Tankless Water Heater provides high 7.4 GPM flow capacity and precise single-degree temperature settings for busy households. Its substantial 112.5-amp demand requires an electrical panel ready for three dedicated 40A circuits.
WINTEMP 27kW Electric Tankless Water Heater
Best for: homes wanting WiFi monitoring and multi-fixture supply
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 6.5 GPM
- Voltage
- 240V
- Temperature Control
- 86°F to 140°F
- Certification
- ETL
The Wintemp 27 kW WiFi Electric Tankless Water Heater provides on-demand hot water for whole-home use, delivering up to 6.5 GPM across two to four fixtures. It operates on 240 volts and requires a 200-amp service with three 40-amp double-pole breakers. With Tuya and Smart Home app compatibility, you can adjust temperatures between 86°F and 140°F remotely. It fits households that need multi-point capacity with remote energy and water monitoring.
Pros
- Delivers up to 6.5 GPM to serve 2 to 4 points of use
- Built-in WiFi supports remote temperature adjustments from 86°F to 140°F
- Compact dimensions of 15.9 x 13 x 4.2 inches with 3/4-inch NPT connections
- Features self-modulating power output and zero-energy standby
Cons
- Requires a 200A service panel with three 40A double-pole breakers
- Manufacturer limited warranty is restricted to 2 years
Good fit if
- You run two to four hot water fixtures at the same time
- You want app-based controls to monitor energy and adjust temperatures
- You have an electrical setup supporting 113 amps on three 40A breakers
Skip if
- You lack electrical capacity for three dedicated 40A double-pole breakers
- You require flow rates higher than 6.5 GPM for high-demand use
Verdict: Wintemp 27 kW WiFi Electric Tankless Water Heater pairs a 6.5 GPM output with mobile app tracking and remote temperature control. It serves homes with sufficient 200-amp electrical capacity seeking multi-point supply.
VEVOR 27 kW Electric Water Heater with Touch Screen
Best for: compact residential or commercial installations
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Voltage
- 240V
- Temperature Control
- 30-60°C / 86-140°F
- Dimensions
- 10.9 x 10.9 x 3.94 inches
- Weight
- 13.6 pounds
View on Amazon: VEVOR 27 kW Electric Water Heater with Touch Screen
The VEVOR 27 kW electric tankless water heater delivers on-demand hot water using a 240-volt die-cast aluminum heating system. You can adjust output temperatures between 86°F and 140°F using the built-in LCD touch screen. It connects via standard 3/4-inch NPT fittings and measures 10.9 by 10.9 by 3.94 inches. This unit suits you if you need compact residential or commercial heating with dedicated 120-amp electrical capacity.
Pros
- Die-cast aluminum heating element separates water from electrical components
- Adjustable temperature range from 86°F to 140°F
- LCD touch screen with long-press security lock
- Compact dimensions of 10.9 x 10.9 x 3.94 inches
Cons
- Requires high electrical supply of three 40A breakers and six 8 AWG wires
- Flow rate in gallons per minute is not provided in published specs
- No Wi-Fi connectivity or remote control listed
Good fit if
- You have panel space for three 40A double-pole breakers.
- You want digital on-unit controls with a security lock.
- You need a shallow unit under four inches in depth.
Skip if
- You cannot accommodate three 40A breaker circuits.
- You want wireless remote control or smart app integration.
Verdict: VEVOR 27 kW Electric Water Heater with Touch Screen provides steady 240-volt heating with a space-saving die-cast design and direct digital controls. It offers solid residential or commercial heating provided your electrical panel can support the 120-amp demand.
Garvee 27 kW Electric Tankless Water Heater
Best for: compact wall spaces needing 27 kW heating
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Voltage
- 240V
- Dimensions
- 11.4 x 3.54 x 11.4 inches
- Weight
- 17.9 pounds
The Garvee 27 kW Electric Tankless Water Heater is an on-demand whole-house water heater running on a 240V electrical connection. Its compact 11.4 by 11.4-inch footprint and 3.54-inch depth allow you to mount it on utility room or basement walls. It pairs a self-modulating 27 kW heating system with a digital temperature screen, making it a practical option if you want direct electric heating in limited wall space.
Pros
- Self-modulating 27 kW heating system operating on 240V
- Durable stainless steel enclosure for corrosion resistance
- Compact wall-mounted profile measuring 11.4 by 11.4 by 3.54 inches
- Digital temperature display for output monitoring
Cons
- No specific GPM flow rating provided in primary specifications
- No wireless connectivity or remote control included
Good fit if
- You want a 27 kW electric heater housed in a stainless steel casing.
- You have limited installation space and need a depth of under 4 inches.
Skip if
- You need verified manufacturer GPM output ratings to plan your flow rates.
- You prefer app-based temperature management or Wi-Fi monitoring.
Verdict: Garvee 27 kW Electric Tankless Water Heater delivers 240V on-demand heating inside a compact, corrosion-resistant stainless steel housing. It gives you digital temperature control while occupying minimal wall space.
WINTEMP 27kW Electric Tankless Water Heater
Best for: homes running two to four fixtures simultaneously
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Use
- Whole House
- Voltage
- 240V
- Dimensions
- 11.1 × 11.1 × 19.1 inches
This WINTEMP 27 kW electric tankless water heater delivers up to 6.3 GPM at 240V for whole-house demand. It uses self-regulating power modulation to support two to four fixtures simultaneously and heats water up to 131°F. You need three 40-amp double-pole breakers, three 8/2 AWG wire runs, and a recommended 250-amp main service panel. It suits medium to large homes needing continuous hot water across multiple fixtures.
Pros
- Delivers up to 6.3 GPM flow rate
- Standard 3/4-inch NPT water connections
- ETL certified with overheat, dry-fire, and leakage protection
- Self-regulating power adjusts to real-time water demand
Cons
- Requires a high-capacity 250-amp main electrical service
- No wireless connectivity or mobile app support listed
- Requires three dedicated 40-amp double-pole breakers and 8/2 AWG wiring
Good fit if
- You have an electrical panel with at least 250 amps of service.
- You need to run two to four hot water fixtures simultaneously.
- You want standard 3/4-inch NPT plumbing fittings.
Skip if
- You lack space for three dedicated 40-amp double-pole breakers.
- You want remote control via Wi-Fi or a smartphone app.
Verdict: WINTEMP 27 kW Whole House Tankless Water Heater delivers up to 6.3 GPM across multiple fixtures if your home panel meets the heavy 113-amp, 3-breaker electrical draw.
Camplux 27 kW Digital Electric Tankless Water Heater
Best for: whole-house heating with clear digital temperature tracking
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Voltage
- 240V
- Temperature Control
- 80°F to 140°F
- Certification
- ETL
- Dimensions
- 17.12 x 13.12 x 3.12 inches
View on Amazon: Camplux 27 kW Digital Electric Tankless Water Heater
The Camplux 27 kW Digital Electric Tankless Water Heater provides on-demand hot water using 240-volt electric power. It features a digital display showing current water temperatures between 80°F and 140°F, along with self-modulating heating elements. The unit requires a minimum flow rate of 0.66 GPM to activate and hooks up via standard 3/4-inch NPT plumbing. This setup suits you if you need steady whole-house water heating with simple, direct temperature monitoring.
Pros
- Digital display shows real-time temperature with heating indicator light
- Adjustable temperature range from 80°F to 140°F
- Self-modulating technology rated up to 99.8% heating efficiency
- Standard 3/4-inch NPT water connections
Cons
- Requires 0.66 GPM minimum flow rate to activate
- No wireless connectivity or remote control included
- Requires three dedicated 8 AWG electrical wire runs
Good fit if
- You want an on-unit digital display showing active temperature readouts.
- You have electrical service capable of supporting three 8 AWG lines at 240 volts.
- You need whole-house heating with standard 3/4-inch NPT pipe fittings.
Skip if
- You need activation at very low water flow rates below 0.66 GPM.
- You want Wi-Fi connectivity or app-based mobile controls.
Verdict: Camplux 27 kW Digital Electric Tankless Water Heater delivers reliable whole-house heating with clear on-unit digital temperature monitoring. It provides steady 240-volt electric performance across an 80°F to 140°F output range.
VancEpic 27kW Electric Tankless Water Heater
Best for: homes needing two to four concurrent outlets
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Voltage
- 240V
- Temperature Control
- 86°F to 131°F, 1°F increments
- Dimensions
- 13.8 x 3.15 x 18.7 inches
- Use
- Whole House
View on Amazon: VancEpic 27kW Electric Tankless Water Heater
This 27 kW electric tankless water heater runs on 240 volts and requires three 40-amp circuit breakers. It provides whole-house hot water across two to four fixtures using standard 3/4-inch NPT connections. You can adjust the temperature from 86°F to 131°F in 1°F increments via knob controls and an LED display. At 18.7 inches tall and 18 pounds, it fits compact utility spaces while supporting multiple simultaneous demands.
Pros
- Heating elements separated from water to reduce scale buildup
- Precise temperature adjustments from 86°F to 131°F in 1°F increments
- Standard 3/4-inch NPT water connections
- Safety package includes leakage protection and overheat shutdown
Cons
- Maximum output temperature capped at 131°F
- Requires three dedicated 40-amp circuit breakers
- No remote or mobile app connectivity listed
Good fit if
- You have panel capacity for three 40-amp 240V circuit breakers.
- You need hot water across two to four simultaneous fixtures.
- You prefer manual knob controls paired with a digital LED display.
Skip if
- You require water temperatures higher than 131°F.
- You want wireless app control or smart features.
Verdict: VancEpic 27 kW Electric Tankless Water Heater delivers reliable whole-home heating for up to four outlets with precise single-degree temperature settings. Its scale-resistant element design and compact 18-pound frame make it a practical choice for 240-volt electrical setups.
Westinghouse 27 kW Wi-Fi Tankless Water Heater
Best for: smart homes needing Wi-Fi connected electric heating
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 0.5–6.3 GPM
- Voltage
- 240 V
- Temperature Control
- 86–140°F, 1°F increments
- Certification
- ETL
View on Amazon: Westinghouse 27 kW Wi-Fi Tankless Water Heater
The Westinghouse 27 kW Wi-Fi Tankless Water Heater is an electric whole-house unit designed to deliver on-demand hot water without a storage tank. It draws 113 amps at 240 volts and supplies flow rates from 0.5 to 6.3 GPM, adjusting based on incoming water temperatures. With smart connectivity for remote adjustments and 1°F temperature increments from 86°F to 140°F, it suits you if you want precise digital control in compact spaces.
Pros
- Wi-Fi app control with Alexa and Google Home compatibility
- Delivers up to 6.3 GPM at 77°F inlet temperature
- Adjustable temperature from 86°F to 140°F in 1°F increments
- Includes scale inhibitor and standard 3/4-inch NPT connections
Cons
- Flow rate decreases to 4.0 GPM with 57°F inlet water
- Requires a high-capacity 113-amp electrical service at 240V
- Requires a minimum flow rate of 0.5 GPM to activate
Good fit if
- You want to adjust water heater settings remotely using an app, Alexa, or Google Home.
- You have an electrical panel capable of supporting 240 volts and a 113-amp load.
- You need a compact unit measuring 18.7 by 14.17 by 3.94 inches for tight installations.
Skip if
- You live in a colder climate where inlet water drops below 57°F and you need more than 4.0 GPM.
- You have an electrical service panel that cannot support a 113-amp requirement.
Verdict: Westinghouse 27 kW Wi-Fi Tankless Water Heater pairs high electric output with smart home integration and fine temperature tuning. Its 113-amp draw requires adequate electrical capacity, but it provides flexible remote control for spaces needing up to 6.3 GPM.
APUS 27kW 240V Tankless Water Heater
Best for: homes needing 5.0 GPM multi-point capacity
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 6.5 GPM
- Voltage
- 240V
- Temperature Control
- 86°F–140°F in 1°F increments
- Dimensions
- 17.7 × 11.4 × 3.5 inches
The APUS 27kW Electric Tankless Water Heater delivers continuous hot water for multi-point residential setups without taking up floor space. It runs on 240 volts and produces up to 5.0 to 6.5 GPM of hot water, serving three to four fixtures at once. With 1-degree temperature adjustments between 86°F and 140°F and standard 3/4-inch NPT fittings, it suits you if you need high-capacity electric heating.
Pros
- Adjustable temperature range from 86°F to 140°F in 1°F increments
- LED digital display with memory setting recall
- Compact wall-mount footprint measuring 17.7 by 11.4 by 3.5 inches
- Standard 3/4-inch NPT water connections
Cons
- Requires substantial electrical infrastructure of three 40A breakers and six 8 AWG wires
- No wireless connectivity or remote control listed in the specifications
Good fit if
- You need to supply hot water for three to four fixtures simultaneously.
- You want fine temperature tuning in 1°F increments between 86°F and 140°F.
- You have space and electrical capacity for three 40A double-pole breakers.
Skip if
- You lack the electrical panel capacity to support three dedicated 40A breakers.
- You require built-in Wi-Fi or smartphone control for temperature management.
Verdict: APUS 27kW Electric Tankless Water Heater provides precise 1°F digital temperature adjustments and steady residential flow in a compact 19-pound chassis. Its heavy electrical requirements demand significant panel space, making it best suited for dedicated 240V upgrades.
Fogatti 27kW Electric Tankless Water Heater
Best for: multi-fixture homes needing exact digital temperature control
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 6.7 GPM
- Voltage
- 240 V
- Temperature Control
- 86–140°F, 1°F increments
- Certification
- ETL
The FOGATTI 27 kW Electric Tankless Water Heater provides on-demand hot water with a maximum flow rate of 6.7 GPM. Powered by a 240-volt electrical connection, it offers precise temperature adjustments from 86°F to 140°F in 1°F increments using an LED display and control knob. With an ETL safety certification and a compact 17.1-by-12.9-by-3.9-inch profile, this unit suits your whole-home setup if you need to run three to four fixtures simultaneously.
Pros
- Delivers up to 6.7 GPM flow rate for multi-fixture use
- Digital LED display with 1°F adjustments from 86°F to 140°F
- Compact wall-mountable dimensions of 17.1 x 12.9 x 3.9 inches
- Includes overheat prevention, leak detection, and ETL certification
Cons
- Requires a heavy electrical supply of 100 amps across three 40A breakers
- Does not include Wi-Fi or remote monitoring capabilities
Good fit if
- You need up to 6.7 GPM to supply three to four fixtures at the same time.
- You want precise single-degree temperature control via a front knob and digital display.
- You have space in your electrical panel for three 40A breakers and 8 AWG wiring.
Skip if
- You lack the panel capacity to support a 100A, 240V dedicated electric load.
- You want integrated Wi-Fi or smartphone app controls.
Verdict: FOGATTI 27 kW 6.7 GPM Electric Tankless Water Heater delivers strong whole-house flow with exact single-degree temperature settings. It provides reliable output and compact wall mounting as long as your electrical panel supports its 100-amp demand.
EcoSmart 27 kW Electric Tankless Water Heater
Best for: point-of-use sinks and compact bathroom installations
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 2.7 to 6.6 GPM
- Voltage
- 240 V
- Temperature Control
- within 1 degree
- Dimensions
- 19 x 4.25 x 9.25 inches
View on Amazon: EcoSmart 27 kW Electric Tankless Water Heater
This 240-volt electric tankless water heater delivers 27 kW of heating power and supplies a flow rate between 2.7 and 6.6 GPM depending on your incoming water temperature. It measures 19 by 4.25 by 9.25 inches and weighs 10.9 pounds, allowing for compact wall mounting. You get self-modulating temperature control accurate within 1 degree. It suits point-of-use setups, bathrooms, or office breakrooms needing targeted hot water delivery.
Pros
- Flow rate ranges from 2.7 to 6.6 GPM based on inlet temperature
- Temperature control stays accurate within 1 degree
- 96% thermal energy efficient operation
- Compact 19 x 4.25 x 9.25 inch frame weighing 10.9 pounds
Cons
- Demands a 112.5-amp electrical service at 240 volts
- Parts warranty covers only one year
- Flow rate falls to 2.7 GPM with low inlet water temperatures
Good fit if
- You need a compact electric heater for a bathroom or office breakroom.
- You want temperature stability maintained within 1 degree.
- You have an electrical setup capable of delivering 112.5 amps at 240 volts.
Skip if
- You cannot supply 112.5 amps on a 240-volt electrical service.
- You require more than 2.7 GPM in regions with very cold groundwater.
Verdict: EcoSmart 27 kW Electric Tankless Water Heater delivers 27 kW of heating power with tight 1-degree regulation in a compact 10.9-pound frame. Its 96% thermal efficiency fits dedicated point-of-use setups where space is limited.
VancEpic 27kW Electric Tankless Heater
Best for: tight spaces and 240V homes
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Voltage
- 240V
- Dimensions
- 15.9" H x 3.19" W x 3.19" D
- Use
- Whole House
- Weight
- 13.8 pounds
The VancEpic 27kW electric tankless water heater delivers whole-house hot water at 240V. It features a compact gray design measuring 15.9 inches tall and 3.19 inches wide. The unit uses smart self-modulating inverter technology to adjust power based on flow. It includes an inlet filter for protection and multiple safety features. This model is suitable for tight installation spaces where wall mounting is preferred.
Pros
- Compact 15.9-inch height fits tight spaces
- Smart self-modulating inverter technology
- Built-in inlet filter protects components
- Multiple safety protections included
Cons
- Requires 3x8 AWG wiring
- Only 2-year warranty
- No digital display mentioned
Good fit if
- You need a compact unit for tight spaces
- You have 240V electrical capacity
- You want whole-house hot water
Skip if
- You need WiFi connectivity
- You require a digital display
- You cannot install 3x8 AWG wiring
Verdict: VancEpic 27kW Electric Tankless Heater fits homes with tight installation spaces and 240V capacity. It provides reliable hot water without digital controls.
GE 27 kW Touchscreen Tankless Water Heater
Best for: warm-climate homes needing compact touch-controlled heating
- Wattage
- 27 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 5.4 GPM
- Voltage
- 240 V
- Temperature Control
- Digital touch screen
- Dimensions
- 15.2 x 10.2 x 3.7 in
This 27 kW electric tankless water heater runs on a 240V supply to deliver on-demand hot water throughout your home. It delivers up to 5.4 GPM under warm conditions, supporting multiple fixtures simultaneously. Measuring 15.2 by 10.2 by 3.7 inches and weighing 14 pounds, it mounts compactly. You adjust temperature settings directly through the integrated digital touch screen, making it well suited for space-constrained home setups.
Pros
- Delivers up to 5.4 GPM for whole-home demand
- Built-in digital touch screen for temperature adjustments
- Compact footprint measuring 15.2 by 10.2 by 3.7 inches
Cons
- Maximum 5.4 GPM rating requires warm 72°F inlet water
- No wireless connectivity or remote controls included
Good fit if
- You live in a warmer climate with higher incoming water temperatures.
- You prefer setting your temperature directly via an on-unit digital touch screen.
- You need a shallow 3.7-inch depth profile for tight utility spaces.
Skip if
- You need flow rates higher than 5.4 GPM for simultaneous fixtures.
- You want Wi-Fi connectivity to monitor heating from a phone.
Verdict: GE 27 kW Touchscreen Tankless Water Heater provides steady 240V whole-home heating within a compact 14-pound frame. It serves households well that prioritize simple on-unit digital adjustments over wireless controls.
Specifications side by side
| Spec | Thermomate 27kW 6.6 GPM Electric Tankless Water Heater | SIVUATEK 27kW Electric Tankless Water Heater | NOVIEEX 27kW 7.4 GPM Electric Tankless Water Heater | WINTEMP 27kW Electric Tankless Water Heater | VEVOR 27 kW Electric Water Heater with Touch Screen | Garvee 27 kW Electric Tankless Water Heater | WINTEMP 27kW Electric Tankless Water Heater | Camplux 27 kW Digital Electric Tankless Water Heater | VancEpic 27kW Electric Tankless Water Heater | Westinghouse 27 kW Wi-Fi Tankless Water Heater | APUS 27kW 240V Tankless Water Heater | Fogatti 27kW Electric Tankless Water Heater | EcoSmart 27 kW Electric Tankless Water Heater | VancEpic 27kW Electric Tankless Heater | GE 27 kW Touchscreen Tankless Water Heater |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fuel Type | Electric | Electric | Electric | Electric | Electric | Electric | not specified | Electric | Electric | Electric | Electric | Electric | Electric | Electric | Electric |
| Flow Rate | 6.6 GPM | not specified | 7.4 GPM | 6.5 GPM | not specified | not specified | not specified | not specified | not specified | 0.5–6.3 GPM | 6.5 GPM | 6.7 GPM | 2.7 to 6.6 GPM | not specified | 5.4 GPM |
| Wattage | 27 kW | 27kW | 27kW | 27 kW | 27KW | 27kW | not specified | 27kW | 27kW | 27 kW | 27kW | 27 kW | 27 kW | not specified | not specified |
| Installation Location | not specified | not specified | Indoor | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Voltage | 240 V | 240V | 240V | 240V | 240V | 240V | not specified | 240V | 240V | 240 V | 240V | 240 V | 240 V | 240V | 240 V |
| Temperature Control | 80°F to 140°F | 86°F to 131°F, 1°F increments | 77°F to 140°F, 1°F increments | 86°F to 140°F | 30-60°C / 86-140°F | not specified | not specified | 80°F to 140°F | 86°F to 131°F, 1°F increments | 86–140°F, 1°F increments | 86°F–140°F in 1°F increments | 86–140°F, 1°F increments | within 1 degree | not specified | Digital touch screen |
| Certification | ETL | not specified | not specified | ETL | not specified | not specified | not specified | ETL | not specified | ETL | not specified | ETL | not specified | not specified | not specified |
| Dimensions | 17.09" x 13.15" x 3.15" | 15.87 x 11.14 x 2.87 in | 15.86" H x 14.13" W x 3.18" D | 15.9 x 13 x 4.2 in | 10.9 x 10.9 x 3.94 inches | 11.4 x 3.54 x 11.4 inches | not specified | 17.12 x 13.12 x 3.12 inches | 13.8 x 3.15 x 18.7 inches | 18.7 x 14.17 x 3.94 in | 17.7 × 11.4 × 3.5 inches | 17.1 x 12.9 x 3.9 in | 19 x 4.25 x 9.25 inches | 15.9" H x 3.19" W x 3.19" D | 15.2 x 10.2 x 3.7 in |
| Use | not specified | Whole House | Whole House | not specified | not specified | not specified | Whole House | Whole House | Whole House | Whole House | not specified | Whole House | not specified | Whole House | Whole House |
| Features | not specified | not specified | not specified | WiFi | not specified | not specified | not specified | Digital Display | not specified | WiFi | not specified | not specified | not specified | not specified | not specified |
| Weight | 19 pounds | not specified | not specified | 21.5 pounds | 13.6 pounds | 17.9 pounds | not specified | 20.3 pounds | 18 pounds | not specified | 19 pounds | 19 pounds | 10.9 pounds | 13.8 pounds | 14 pounds |
| Color | Gray | Gray | Silver | Gray | Black | Black | Gray | White | White | Gray 27 | AP-27kW,Gray | Gray 27k | White | Gray | Diamond Gray |
| Model | EH270 | TSB-270 | DS-18 | WM27V | JN27 | PTH_33HB3MVR | YQ-WN27K | TEW27 | RE27K | ET027CA0G | AP- ADSK-270G13 | InstaE 27kW | ECOS 27 | RE27K-C | GE27DNHPDG |
| Size | not specified | not specified | not specified | 27 (kW) | 27KW | 27KW | WN-27 | 240V/27kW | not specified | L-27 | not specified | L-27 | not specified | not specified | 27 Kilowatts |
Is 27 kW the right power level for your home?
A 27 kW rating indicates high-capacity electric heating. These units typically require 100 to 200 amps of electrical service. They support whole-house use or high-flow point-of-use applications. The Thermomate and NOVIEEX models deliver up to 7.4 GPM. This power level suits homes needing simultaneous multi-fixture supply. Lower wattage units may struggle with concurrent showers. Check your panel capacity before selecting this tier.
Worth it if
- You need whole-home hot water for multiple simultaneous fixtures
- Your electrical panel supports 100 to 200 amps
- You require flow rates above 5.0 GPM
Skip it if
- Your electrical service is below 100 amps
- You only need hot water for a single sink
- You cannot install dedicated 40-amp breakers
If you are also looking for the best DREO space heaters, you can find those picks on the dedicated page.
How We Picked 27 kW Heaters
We selected these models by scanning Amazon listings for the specific 27 kW wattage rating. Only units explicitly stating this power output in their title or feature list qualified for consideration. This strict filter ensures every product on the list delivers the same heating capacity. We did not handle or test any units ourselves. All information comes directly from the published specifications on each product page.
The final ranking relies on three criteria. First, we prioritize products currently in stock. Second, we order by the listing’s overall rating, weighted by the number of ratings. Third, we consider how many of our core specification criteria each unit meets. This method keeps the focus on verified data rather than subjective opinion or external factors.
How to choose the right one
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Check electrical panel capacity
Every 27 kW unit requires substantial electrical service. Most models draw between 100 and 200 amps. The VEVOR demands 120 amps, while the NOVIEEX needs 112.5 amps across three breakers. Verify your main panel can handle the load before buying. Insufficient capacity causes tripping or safety hazards. Match your panel rating to the highest amp draw in your shortlist. This ensures stable operation during peak usage times without overloading your home grid.
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Match flow rate to fixtures
Flow rate determines how many showers you can run. The NOVIEEX delivers 7.4 GPM, ideal for large households. The APUS offers 5.0 GPM, suitable for smaller needs. The Thermomate provides 6.6 GPM for balanced performance. Count your simultaneous fixtures. If two showers run at once, aim for 5.0 GPM or higher. Lower flow rates restrict water pressure. Select a model that meets your peak daily demand to avoid temperature drops during use.
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Verify voltage compatibility
All listed units operate on 240V power. This is standard for electric tankless heaters. Ensure your home has dedicated 240V circuits. The SIVUATEK and APUS both require this voltage. You cannot use these on standard 120V outlets. Check your breaker box for available 240V slots. Installing these units requires professional electrical work. Incorrect voltage causes immediate failure. Confirm your wiring supports the specific amperage draw for your chosen model before installation begins.
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Consider smart home features
Some models offer WiFi connectivity for remote control. The WINTEMP and Westinghouse units include this feature. You can monitor usage and adjust temperature via an app. This adds convenience for tech-savvy users. Other models like the VancEpic and EcoSmart focus on basic digital controls. Choose WiFi if you want remote monitoring. Skip it if you prefer simple on-unit adjustments. Smart features require a stable home network. Ensure your installation location has adequate signal strength for reliable operation.
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Evaluate physical dimensions
Space constraints matter for installation. The VEVOR is notably thin at 3.94 inches deep. The Fogatti is also compact at 3.9 inches wide. The Thermomate is wider at 13.2 inches. Measure your mounting area carefully. Ensure clearance for water and electrical connections. Smaller units fit tight utility closets. Larger models need more wall space. Check width, height, and length specifications. Proper fit prevents installation delays. Verify that your chosen spot accommodates the specific dimensions of your selected heater model.
Frequently asked questions
What is the highest flow rate available in a 27 kW tankless water heater?
The NOVIEEX 27 kW Electric Tankless Water Heater offers the highest flow rate at 7.4 GPM. This capacity supports large households needing high multi-fixture output. It requires an electrical panel ready for three dedicated 40A circuits to maintain this performance level.
Which 27 kW heater includes Wi-Fi connectivity for remote control?
The WINTEMP 27 kW WiFi Electric Tankless Water Heater and the Westinghouse 27 kW Wi-Fi Tankless Water Heater both include Wi-Fi features. These models allow mobile app tracking and remote temperature control. They are suitable for smart homes needing flexible management of up to 6.3 GPM.
How much electrical service does a 27 kW unit typically require?
These units generally require 100 to 200 amps of electrical service. For example, the VEVOR demands 120 amps, while the NOVIEEX needs 112.5 amps across three breakers. You must verify your main panel can support the specific amp draw of your chosen model before installation.
Which 27 kW heater is the most compact in size?
The VancEpic 27kW Electric Tankless Water Heater 240V Whole House is the most compact option. Its dimensions are 3.19 inches wide and 3.19 inches deep. It weighs 13.8 pounds and fits well in tight wall spaces while providing whole-house heating capabilities.
What is the lightest 27 kW tankless water heater on the list?
The EcoSmart 27 kW Electric Tankless Water Heater is the lightest model at 10.9 pounds. It features a compact frame with 96% thermal efficiency. This low weight makes it suitable for dedicated point-of-use setups where space is limited and mounting weight is a concern.
Do any 27 kW models feature a touchscreen interface?
Yes, the VEVOR 27 kW Electric Water Heater and the GE 27 kW Touchscreen Tankless Water Heater both feature touch interfaces. The VEVOR offers direct digital controls, while the GE model provides simple on-unit digital adjustments. These interfaces allow for precise temperature tuning without wireless apps.
Which heater is best for homes with 150-amp electrical service?
The Thermomate 27kW 6.6 GPM Electric Tankless Water Heater is designed for homes with 150-amp electrical service. It delivers 6.6 GPM capacity with isolated cast-aluminum heating. This makes it a reliable choice for whole-house multi-fixture hot water demands in standard residential electrical setups.
What is the lowest flow rate among the top 27 kW heaters?
The APUS 27kW 240V Tankless Water Heater has the lowest flow rate at 5.0 GPM. It provides precise 1°F digital temperature adjustments in a compact 19-pound chassis. This model is best suited for homes needing multi-point capacity where lower flow is acceptable.