Best 11 kW Tankless Water Heaters: 15 Spec-Based Picks
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Finding the best 11 kW tankless water heaters requires comparing published specifications. We evaluated 15 models based strictly on their listed data. The Thermomate 11 kW Electric Tankless Water Heater leads our list because its isolated chamber design supports reliable flow up to 2.15 GPM. This spec makes it ideal for point-of-use sinks and compact bathroom spaces. Each pick is ranked by how its wattage, voltage, and dimensions match specific installation needs. This guide helps you decide which unit fits your electrical capacity and space constraints.
Quick picks
The best fit for you
- You need compact point-of-use heating for small sinks Thermomate 11 kW Electric Tankless Water Heater This 240V unit delivers up to 2.15 GPM within a 7.09 by 7.09-inch base.
- You want smart controls for a single fixture Westinghouse 11 kW Smart Wi-Fi Tankless Water Heater Built-in Wi-Fi enables app control alongside a 2.6 GPM maximum flow rate.
- You have shallow wall space requiring metal construction Garvee 11 kW Square Metal Tankless Heater Its iron casing measures only 2.99 inches deep to fit narrow mountings.
- You deal with hard water in your home Electrolux 11 kW Smart Tankless Water Heater It includes an external scale inhibitor and adjusts from 86°F to 140°F.
Our 15 picks
Thermomate 11 kW Electric Tankless Water Heater
Best for: point-of-use sinks and compact bathroom spaces
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 2.15GPM at 35°F Rise
- Voltage
- 240 Volt
- Temperature Control
- Max temperature up to 131°F
- Certification
- ETL
View on Amazon: Thermomate 11 kW Electric Tankless Water Heater
This 240-volt electric tankless water heater delivers up to 2.15 GPM at a 35°F temperature rise using 11 kW of power. It features an isolated cast aluminum heating chamber, 1/2-inch NPT male fittings, and side water connections. Requiring a 50-amp double-pole breaker and 6 AWG wiring, it fits low-flow point-of-use demands. You get reliable hot water for up to three faucets or dedicated bathroom sinks.
Pros
- Delivers 2.15 GPM at a 35°F temperature rise
- Cast aluminum heating chamber isolates elements from water
- Compact 10.6 by 7.09 by 7.09-inch dimensions weighing 11 pounds
- ETL certified with overheating protection and dry-fire shutoff
Cons
- Maximum water temperature caps at 131°F
- Flow rate limited to 2.15 GPM under a 35°F rise
- Requires a 50-amp double-pole breaker and 6 AWG wiring
Good fit if
- You need point-of-use hot water for up to three sinks or a single low-flow fixture.
- You have electrical capacity for a 240V, 50-amp double-pole breaker and 6 AWG wire.
- You want an isolated heating element design to prevent scale and corrosion.
Skip if
- You require water temperatures higher than 131°F.
- You need whole-home flow rates exceeding 2.15 GPM for simultaneous high-demand appliances.
Verdict: Thermomate 11 kW Electric Tankless Water Heater delivers efficient point-of-use heating with an isolated chamber design. It provides reliable flow up to 2.15 GPM for low-demand domestic or commercial fixtures.
WINTEMP 11 kW 2.6 GPM Tankless Water Heater
Best for: point-of-use fixtures and warm-climate showers
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Voltage
- 240V
- Dimensions
- 9.7 × 9.7 × 14.1 inches
This 11 kW electric tankless water heater delivers on-demand hot water at flow rates up to 2.6 GPM on a 240-volt electrical service. It draws up to 46 amps and requires a single 50-amp double-pole breaker with 8 AWG wiring. Self-regulating heating adjusts power draw based on incoming water temperatures. You will find it well suited for single-point sink use in cold climates or a single shower in warm southern regions.
Pros
- Delivers up to 2.6 GPM maximum flow rate
- Requires only one 50-amp double-pole breaker with 8 AWG wiring
- Equipped with dry-fire, overheat, and electrical leakage safety protections
- Compact wall-mount footprint measuring 9.7 by 14.1 by 3.3 inches
Cons
- Restricted to low-flow sink use in colder climates
- Uses 1/2-inch NPT connections rather than larger 3/4-inch plumbing lines
- Requires dedicated 46-amp hardwired electrical installation
Good fit if
- You have space in your panel for a single 50-amp double-pole breaker.
- You need point-of-use hot water for one to two handwashing fixtures.
- You live in a warm southern climate and need a dedicated single shower supply.
Skip if
- You need simultaneous hot water across an entire household.
- You live in a cold region and require hot water for a high-flow shower.
Verdict: WINTEMP 11 kW 2.6 GPM Tankless Water Heater provides steady point-of-use performance with straightforward single-breaker electrical requirements. It serves warm-region showers or cold-climate handwashing stations effectively without demanding excessive wall space.
Westinghouse 11 kW Smart Wi-Fi Tankless Water Heater
Best for: single-fixture setups needing smart Wi-Fi controls
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 2.6 GPM
- Voltage
- 240V
- Certification
- ETL
- Dimensions
- 12.6" x 9.56" x 9.56"
View on Amazon: Westinghouse 11 kW Smart Wi-Fi Tankless Water Heater
This 11 kW electric tankless water heater delivers up to 2.6 GPM at a 43°F temperature rise. It operates on a dedicated 240V, 60A double-pole circuit with 8 AWG wiring. Built-in Wi-Fi lets you adjust temperatures via voice commands or an app, while the internal memory restores your setting after power interruptions. It suits you if you need a connected, point-of-use unit for a single bathroom shower or sink.
Pros
- Wi-Fi connectivity with Alexa, Google Home, and app support
- Delivers up to 2.6 GPM from a 62°F inlet to 105°F outlet
- Temperature memory function retains settings after power outages
- IPX4 water-resistance rating with ETL safety certification
Cons
- Requires a dedicated 60A breaker and 8 AWG electrical wiring
- Requires a minimum activation flow rate of 0.53 GPM
- Capacity limited to single-point demand
Good fit if
- You want smart-home integration through Wi-Fi, Alexa, or Google Home.
- You have panel space for a dedicated 240V, 60A double-pole breaker.
- You need on-demand hot water dedicated to a single shower or sink.
Skip if
- You need to supply multiple high-flow fixtures simultaneously.
- You use low-flow fixtures running under the 0.53 GPM activation threshold.
- Your electrical service panel cannot support a 60A dedicated load.
Verdict: Westinghouse 11 kW Smart Wi-Fi Tankless Water Heater pairs point-of-use heating with modern smart-home integration for single-fixture applications. Its 2.6 GPM output and automated memory functions make it a capable dedicated fixture heater.
Garvee 11 kW Square Metal Tankless Heater
Best for: shallow wall spaces needing durable metal housing
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Voltage
- 240 V
- Certification
- ETL
- Dimensions
- 2.99 x 14.2 x 14.2 inches
- Weight
- 13.3 pounds
This 11 kW, 240-volt electric tankless water heater delivers on-demand hot water using an iron metal enclosure. Measuring 14.2 by 14.2 inches with a 2.99-inch profile, it fits tight spaces in bathrooms or kitchens. You get self-modulating power adjustment, an LED digital display, and built-in protections for overheating and leakage. It suits you if you need a compact, ETL-listed electric unit for dedicated residential point-of-use heating.
Pros
- Heavy-duty iron metal housing resists corrosion
- Self-modulating technology adjusts power based on water demand
- Digital LED display shows temperature settings
- Slim 2.99-inch depth fits shallow wall spaces
- ETL listed with dry-heat, over-current, and leakage protections
Cons
- No remote control or Wi-Fi monitoring listed
- Specific flow rate in GPM is not documented in specifications
- Weighs 13.3 pounds due to the iron enclosure
Good fit if
- You need a sturdy metal housing rather than a plastic frame.
- You have limited mounting depth and require a 2.99-inch profile.
- You run a 240V electrical supply for a sink or bathroom fixture.
Skip if
- You want wireless controls or smartphone app connectivity.
- You require an exact documented GPM rating before buying.
Verdict: Garvee 11 kW Square Metal Tankless Heater provides durable iron construction and self-modulating 240V power in a slim square footprint. It works well for residential spaces requiring ETL-certified electric heating in compact quarters.
WINTEMP 11kW 240V Electric Tankless Water Heater
Best for: point-of-use sinks and compact apartment setups
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 2.6 GPM
- Voltage
- 240V
- Temperature Control
- 86°F–140°F
- Certification
- ETL
View on Amazon: WINTEMP 11kW 240V Electric Tankless Water Heater
The WINTEMP 11kW 240V Electric Tankless Water Heater provides on-demand hot water for point-of-use fixtures like bathroom sinks and kitchen faucets. It delivers up to 2.6 GPM and lets you set temperatures from 86°F to 140°F on a digital display. If you have a single 50-amp double-pole breaker and 8 AWG wiring ready in a small home or apartment, this compact 8.6-pound unit fits tight wall spaces.
Pros
- Delivers up to 2.6 GPM flow rate
- Digital temperature control from 86°F to 140°F
- Requires a single 50A double-pole breaker and 8 AWG wiring
- ETL certified with overheat, leakage, and dry-fire protection
Cons
- Limited to 1/2-inch NPT plumbing connections
- Max 46-amp draw cannot support whole-home multi-fixture demands simultaneously
Good fit if
- You need up to 2.6 GPM for point-of-use sinks or a small apartment.
- You have panel capacity for one 50-amp double-pole breaker and 8 AWG wire.
- You want digital temperature adjustment between 86°F and 140°F.
Skip if
- You require plumbing connections larger than 1/2-inch NPT.
- You need simultaneous whole-house flow exceeding 2.6 GPM.
Verdict: WINTEMP 11kW 240V Electric Tankless Water Heater provides up to 2.6 GPM with digital temperature control from 86°F to 140°F. It is a practical fit for compact point-of-use installations that have a dedicated 50-amp breaker.
Camplux 11 kW Digital Tankless Water Heater
Best for: precise digital temperature adjustments under counters
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Voltage
- 240 V
- Temperature Control
- 86 to 131°F, 1°F increments
- Certification
- ETL
- Dimensions
- 13.78 x 9.72 x 3.15 in
This 11 kW, 240-volt electric unit provides point-of-use hot water with a digital display for monitoring. It allows precise temperature control from 86°F to 131°F in 1°F increments. With side-facing 1/2-inch NPT connections and a 3.15-inch depth, you can mount it in tight spaces like cabinets. It requires a 50-amp double-pole breaker, 6 AWG wiring, and at least 0.47 GPM flow to activate.
Pros
- Digital display with temperature adjustment in 1°F increments from 86°F to 131°F
- Compact 3.15-inch depth fits inside cabinets and tight spaces
- Side 1/2-inch NPT inlet and outlet simplify under-counter plumbing
- ETL listed with overheat and dry-fire protection
Cons
- Requires a minimum water flow of 0.47 GPM to activate
- Maximum output temperature tops out at 131°F
Good fit if
- You need precise single-degree temperature settings between 86°F and 131°F.
- You are mounting the unit under a sink where side plumbing connections simplify installation.
- You have an electrical setup supporting a 50-amp double-pole breaker and 6 AWG wire.
Skip if
- You need fixture activation below 0.47 GPM.
- You require water temperatures above 131°F.
Verdict: Camplux 11 kW Digital Tankless Water Heater delivers 1°F incremental adjustments and side-mount plumbing connections for compact installations. Its 50-amp electrical requirement and 0.47 GPM activation threshold define its operating limits.
Electrolux 11 kW Smart Tankless Water Heater
Best for: smart home setups with hard water
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 2.59 GPM
- Voltage
- 240 V
- Temperature Control
- 86°F to 140°F
- Certification
- CSA, UL
View on Amazon: Electrolux 11 kW Smart Tankless Water Heater
This 11 kW, 240-volt electric tankless water heater supplies up to 2.59 GPM of on-demand hot water. It features a copper heating core, self-modulating power output, and temperature regulation from 86°F to 140°F. Built-in WiFi allows phone control through Alexa or Google Home. An external scale inhibitor filter protects the heating element. It suits small households or single-fixture setups needing compact, app-connected water heating.
Pros
- Delivers up to 2.59 GPM flow rate on 240-volt, 11 kW power
- Includes external scale inhibitor pre-filter for inlet water
- WiFi connectivity supports Alexa and Google Home control
- Adjustable temperature range from 86°F to 140°F
- UL and CSA certified with IPX4 water resistance rating
Cons
- Scale inhibitor cartridge requires replacement every 6 to 12 months
- Maximum 2.59 GPM flow capacity limits simultaneous multi-fixture demand
Good fit if
- You want smart app integration with Alexa or Google Home support.
- You have hard water and want an included scale inhibitor pre-filter.
- You require temperature control adjustable between 86°F and 140°F.
Skip if
- You need more than 2.59 GPM to run several hot water fixtures simultaneously.
- You prefer a system without recurring filter cartridge replacements.
Verdict: Electrolux 11 kW Smart Tankless Water Heater pairs a 2.59 GPM flow rate with smart WiFi controls and an external scale inhibitor. It delivers precise 86°F to 140°F heating for low-demand point-of-use or single-fixture installations.
Fogatti 11 kW Electric Tankless Water Heater
Best for: single-fixture point-of-use applications in tight spaces
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 2.6 GPM
- Voltage
- 240 V
- Temperature Control
- 86°F to 140°F, ±1°F
- Certification
- ETL
View on Amazon: Fogatti 11 kW Electric Tankless Water Heater
The Fogatti 11 kW Electric Tankless Water Heater is an electric point-of-use unit designed for tight spaces like cabins and small apartments. Running on a dedicated 240-volt, 50-amp circuit, it produces up to 2.6 GPM with an activation flow rate of 0.5 GPM. The onboard LED display and knob let you adjust output from 86°F to 140°F. It suits single-fixture setups or warm-climate dual-fixture applications.
Pros
- Adjustable temperature range from 86°F to 140°F within ±1°F
- Delivers up to 2.6 GPM maximum flow rate
- Compact footprint measuring 14.3 by 9.6 by 3.5 inches
- ETL certified with built-in overheat and leak protection
Cons
- Requires a 0.5 GPM minimum flow rate to activate
- Restricted to single-fixture use when incoming water is cold
- Incompatible with standard 120V electrical systems
Good fit if
- You need a compact wall-mounted unit for a small apartment, cabin, or sink.
- You have a dedicated 240V service panel with a 50A breaker and 8 AWG wire.
- You want knob-adjusted temperature control between 86°F and 140°F.
Skip if
- You only have a 120V electrical hookup available.
- You need simultaneous multi-fixture hot water in cold climates.
- You run low-flow fixtures below the 0.5 GPM activation threshold.
Verdict: Fogatti 11 kW Electric Tankless Water Heater provides steady, space-saving point-of-use heating with simple knob-controlled temperature precision. It delivers reliable single-fixture performance provided your electrical panel meets its 50-amp, 240-volt demand.
Electrolux 11 kW Smart Tankless Water Heater
Best for: hard water setups needing smart temperature control
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 0.53 GPM
- Voltage
- 240V
- Temperature Control
- 86°F to 140°F
- Certification
- ETL Listed to UL 499
View on Amazon: Electrolux 11 kW Smart Tankless Water Heater
This Electrolux unit provides 11 kW of on-demand heating on a 240V electrical connection. It pairs an included external scale inhibitor filter with a lead-free copper core to protect the heating element from mineral buildup. Operating across 86°F to 140°F with activation at 0.53 GPM, it suits single-point setups where you want app monitoring or Alexa voice adjustments alongside built-in scale defense.
Pros
- Includes external scale inhibitor pre-filter
- WiFi connectivity with phone app and Alexa voice control
- Lead-free copper heating core
- Temperature adjustment range from 86°F to 140°F
- Compact 12.8 x 8.9 x 3.3-inch dimensions with IPX4 rating
Cons
- Requires filter cartridge replacements every 6 to 12 months
- Requires a minimum water flow rate of 0.53 GPM to activate
Good fit if
- You deal with hard water and need built-in scale protection.
- You want temperature management via smartphone app or Alexa voice commands.
- You need a compact 240V unit operating between 86°F and 140°F.
Skip if
- You prefer a setup that never requires periodic filter cartridge swaps.
- You need the unit to activate at flow rates lower than 0.53 GPM.
Verdict: Electrolux 11 kW Smart Tankless Water Heater provides reliable 240V electric heating with smart app integration and an external anti-scale filter. It delivers steady output from 86°F to 140°F for homes managing hard water.
AutoSteelix 11kW 240V Tankless Water Heater
Best for: compact point-of-use installations
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Voltage
- 240V
- Certification
- ETL
- Dimensions
- 14.2 x 2.99 x 14.2 inches
- Weight
- 13.3 pounds
The AutoSteelix 11kW heater delivers on-demand hot water for point-of-use applications like sinks or small bathrooms. It features a compact metal housing measuring 14.2 by 14.2 by 2.99 inches. The unit operates on 240V power and includes an LED display for digital temperature control. Self-modulating technology adjusts heating based on flow. It is ETL listed and includes safety protections against overheating and dry-heating.
Pros
- Compact 2.99-inch depth saves space
- Durable iron enclosure protects components
- LED display shows temperature settings
- ETL listed for safety compliance
- Self-modulating energy efficiency
Cons
- No Wi-Fi connectivity for remote control
- No included remote control
- Limited to point-of-use flow rates
Good fit if
- You need a compact unit for a small sink
- You want a durable metal housing
- You prefer digital temperature controls
Skip if
- You require Wi-Fi connectivity
- You need whole-house hot water
- You want a remote control
Verdict: The AutoSteelix 11kW Electric Tankless Heater is a compact, durable option for point-of-use installations. It suits buyers who prioritize a small footprint and digital controls over smart features.
Westinghouse 11kW Wi-Fi Tankless Water Heater
Best for: single fixtures needing smart Wi-Fi control
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 0.5–2.6 GPM
- Voltage
- 240 V
- Temperature Control
- 86–140°F, 1°F increments
- Certification
- ETL
View on Amazon: Westinghouse 11kW Wi-Fi Tankless Water Heater
This 11 kW, 240-volt electric tankless water heater delivers between 0.5 and 2.6 GPM of hot water for single point-of-use setups. It features Wi-Fi integration compatible with Alexa and Google Home, letting you adjust temperatures from 86°F to 140°F in 1°F increments. It suits you if you need compact under-sink heating with remote smart control and have a 46-amp electrical capacity available.
Pros
- Wi-Fi connectivity with Alexa and Google Home support
- Temperature adjustment from 86°F to 140°F in 1°F increments
- Includes scale inhibitor and built-in leak and overheat protection
- Requires only 0.5 GPM minimum flow to activate
Cons
- Output drops to 1.4 GPM with a 57°F inlet temperature
- Requires a 46-amp electrical draw
Good fit if
- You want remote temperature adjustment via mobile app or voice control.
- You need a compact unit for a single point of use like a sink or RV.
Skip if
- You have incoming water at 57°F or colder and require more than 1.4 GPM.
- You cannot supply a 46-amp, 240-volt circuit on your electrical panel.
Verdict: Westinghouse 11kW Wi-Fi Tankless Water Heater pairs precise 1°F temperature tuning with smart app connectivity for single-fixture applications. Its 1.4 GPM limit under colder inlet conditions makes it best suited for moderate demands.
GE 11 kW Tankless Water Heater with Remote
Best for: point-of-use setups needing wireless temperature control
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 2.5 GPM
- Voltage
- 240 V
- Temperature Control
- Digital touch screen, remote up to 30 ft
- Dimensions
- 14.2 x 8.5 x 2.4 in
This GE unit delivers 11 kW of heating power on a 240-volt electrical supply. It measures 14.2 by 8.5 by 2.4 inches, making it compact enough for point-of-use installations. It provides flow rates up to 2.5 GPM, which handles two faucets and one shower simultaneously with a 72°F inlet temperature. A digital touch screen and an included 30-foot remote give you flexible temperature controls.
Pros
- Includes a remote control that operates from up to 30 feet away
- Delivers up to 2.5 GPM of continuous hot water
- Compact depth of 2.4 inches for point-of-use mounting
- Features a digital touch screen for temperature adjustments
Cons
- Achieving 2.5 GPM requires warm 72°F incoming water
- Requires a 240V electrical connection
Good fit if
- You need point-of-use water heating in tight spaces.
- You want to adjust water temperatures using a 30-foot remote.
- You live in a warm climate with 72°F ground water.
Skip if
- You require more than 2.5 GPM of water flow.
- You have cold inlet water and need to run multiple fixtures.
Verdict: GE 11 kW Tankless Water Heater with Remote offers dependable point-of-use heating with dual touch-screen and 30-foot remote controls. It is a solid choice for small fixtures or warm-climate installations requiring up to 2.5 GPM.
Thermomate 11kW Electric Tankless Water Heater
Best for: Low-flow point-of-use applications
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 2.15 GPM at 35°F rise
- Voltage
- 208~240 Volt
- Temperature Control
- within 1°F
- Certification
- ETL
View on Amazon: Thermomate 11kW Electric Tankless Water Heater
The ThermoMate 11kW unit delivers instant hot water at 2.15 GPM with a 35°F temperature rise. It features self-modulating technology to maintain output within 1°F of your setting. The compact 11.8-inch width fits tight spaces. It requires a 60Amp breaker setup. This electric heater is ETL certified for safety. It suits low-flow applications like bathroom sinks or point-of-use stations.
Pros
- 11kW power output for consistent heating
- Precise temperature control within 1°F
- Compact 11.8" width saves space
- ETL certified for safety
Cons
- Lower flow rate of 2.15 GPM compared to competitors
- Requires 60Amp breaker (two 30Amp double-pole)
- No Wi-Fi connectivity mentioned
Good fit if
- You need precise temperature stability
- You have limited wall space
- You want ETL certification
Skip if
- You need high flow rates
- You want smart home integration
- You only have a 40Amp breaker
Verdict: ThermoMate 11kW Electric Tankless Heater offers stable temperature control for low-flow needs. It fits tight spaces but requires significant electrical capacity. Choose it for precise, compact point-of-use heating.
LiberLive 11 kW 240V Tankless Water Heater
Best for: point-of-use heating for one or two fixtures
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 1.0–2.6 GPM
- Voltage
- 240V
- Temperature Control
- 86°F to 131°F, 1°F increments
- Certification
- CSA
This LiberLive electric tankless water heater runs on 240 volts and draws 11 kW to deliver hot water at flow rates between 1.0 and 2.6 GPM. You can set output temperatures from 86°F to 131°F in 1°F increments using the control knob and LED screen. It activates at 0.32 GPM, making it a practical option if you need point-of-use heating for one to two fixtures in a bathroom, workshop, or garage.
Pros
- Delivers between 1.0 and 2.6 GPM with a minimum activation flow of 0.32 GPM
- Temperature adjustment from 86°F to 131°F in 1°F increments via dial knob and LED display
- CSA listed with dry-fire, leakage, and over-temperature safety protections
- Compact 11 by 7.9 by 7.9-inch footprint weighing 5 pounds
Cons
- Maximum output temperature caps at 131°F
- Requires at least 0.32 GPM of water flow to activate heating
- No wireless connectivity or remote control listed
Good fit if
- You need point-of-use hot water for one or two compact fixtures.
- You want precise temperature changes in 1°F steps using a manual knob.
- You have a dedicated 240-volt electrical supply ready for an 11 kW load.
Skip if
- You need water temperatures higher than 131°F.
- You want app control or remote monitoring capabilities.
- You require continuous hot water for more than two simultaneous fixtures.
Verdict: LiberLive 11 kW 240V Tankless Water Heater provides steady 1.0 to 2.6 GPM delivery and single-degree temperature settings in a compact 5-pound package. It offers reliable point-of-use performance for one or two fixtures needing up to 131°F water.
MIZUDO 11 kW Electric Tankless Water Heater
Best for: single-fixture use in apartments or small bathrooms
- Wattage
- 11 kW (what this guide is about)
- Fuel Type
- Electric
- Flow Rate
- 2.6 GPM
- Voltage
- 240 V
- Temperature Control
- 86°F to 140°F
- Certification
- ETL
This MIZUDO unit is an 11 kW, 240-volt electric tankless water heater designed for single-point setups such as a sink or shower. It supports a maximum flow rate of 2.6 GPM and activates at 0.4 GPM. You can adjust temperatures from 86°F to 140°F via the LED touch display. It requires a 50-amp two-pole breaker with 8 AWG wiring, making it suitable for compact apartments or targeted bathroom installations.
Pros
- Supports up to 2.6 GPM maximum flow rate
- Digital LED touch control from 86°F to 140°F
- Uses standard 1/2-inch NPT water connections
- Compact 14.2 by 9.5 by 2.8-inch dimensions
Cons
- Requires at least 0.4 GPM to trigger heating
- Winter flow drops to 1.2 GPM with cold inlet water
- Designed only for single-fixture use
Good fit if
- You need a dedicated heater for a single shower or sink.
- You have a 50A two-pole breaker and 8 AWG wiring available.
Skip if
- You need to supply hot water to multiple fixtures at once.
- You live in a cold region and require more than 1.2 GPM in winter.
Verdict: MIZUDO 11 kW Electric Tankless Water Heater provides precise point-of-use heating up to 2.6 GPM for individual fixtures. Its compact casing fits tight spaces that support a 50-amp electrical setup.
Specifications side by side
| Spec | Thermomate 11 kW Electric Tankless Water Heater | WINTEMP 11 kW 2.6 GPM Tankless Water Heater | Westinghouse 11 kW Smart Wi-Fi Tankless Water Heater | Garvee 11 kW Square Metal Tankless Heater | WINTEMP 11kW 240V Electric Tankless Water Heater | Camplux 11 kW Digital Tankless Water Heater | Electrolux 11 kW Smart Tankless Water Heater | Fogatti 11 kW Electric Tankless Water Heater | Electrolux 11 kW Smart Tankless Water Heater | AutoSteelix 11kW 240V Tankless Water Heater | Westinghouse 11kW Wi-Fi Tankless Water Heater | GE 11 kW Tankless Water Heater with Remote | Thermomate 11kW Electric Tankless Water Heater | LiberLive 11 kW 240V Tankless Water Heater | MIZUDO 11 kW Electric Tankless Water Heater |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fuel Type | Electric | not specified | Electric | Electric | Electric | Electric | Electric | Electric | Electric | Electric | Electric | Electric | Electric | Electric | Electric |
| Flow Rate | 2.15GPM at 35°F Rise | not specified | 2.6 GPM | not specified | 2.6 GPM | not specified | 2.59 GPM | 2.6 GPM | 0.53 GPM | not specified | 0.5–2.6 GPM | 2.5 GPM | 2.15 GPM at 35°F rise | 1.0–2.6 GPM | 2.6 GPM |
| Wattage | 11kW | not specified | 11 kW | 11 kW | 11kW | 11 kW | 11 kW | 11 kW | 11kW | 11kW | not specified | 11,000 W | 11kW | 11 kW | 11 kW |
| Voltage | 240 Volt | not specified | 240V | 240 V | 240V | 240 V | 240 V | 240 V | 240V | 240V | 240 V | 240 V | 208~240 Volt | 240V | 240 V |
| Temperature Control | Max temperature up to 131°F | not specified | not specified | not specified | 86°F–140°F | 86 to 131°F, 1°F increments | 86°F to 140°F | 86°F to 140°F, ±1°F | 86°F to 140°F | not specified | 86–140°F, 1°F increments | Digital touch screen, remote up to 30 ft | within 1°F | 86°F to 131°F, 1°F increments | 86°F to 140°F |
| Certification | ETL | not specified | ETL | ETL | ETL | ETL | CSA, UL | ETL | ETL Listed to UL 499 | ETL | ETL | not specified | ETL | CSA | ETL |
| Dimensions | 10.6"H x 7.09"L x 7.09"W | not specified | 12.6" x 9.56" x 9.56" | 2.99 x 14.2 x 14.2 inches | 14 x 9.7 x 3.4 inches | 13.78 x 9.72 x 3.15 in | 12.8 x 8.9 x 3.3 inches | 14.3 x 9.6 x 3.5 inches | 12.8 x 8.9 x 3.3 inches | 14.2 x 2.99 x 14.2 inches | 12.8 x 3.58 x 8.9 inches | 14.2 x 8.5 x 2.4 in | 11.8" W x 3.13" H x 14.8" D | 11 x 7.9 x 7.9 inches | 14.2 x 9.5 x 2.8 in |
| Features | not specified | not specified | WiFi | not specified | not specified | Digital Display | not specified | not specified | not specified | not specified | WiFi | not specified | not specified | not specified | not specified |
| Weight | 11 pounds | not specified | not specified | 13.3 pounds | 8.6 pounds | 11 pounds | 7.8 pounds | not specified | not specified | 13.3 pounds | 7.8 pounds | not specified | not specified | 5 pounds | not specified |
| Color | Gray | Gray | Gray | balck | Gray | White | Pearl White | Gray 11 | Pearl White | Black | Gray 11 | Diamond Gray | Gray | Gray | Moonlight |
| Model | ET110HCUS | WN11 | WET011A0G | PTH_33HAA3LA9Ks-h | YQ-WN11K | TEW11-CA | 11-2 | 11kw | ET011C | bQ5-33HAA3LAy4a | ET011CA0G | GE11SNHPDG | ET110 | REK11/13 | 11kW |
| Size | not specified | 11kW | S-11 | 11KW | WN-11 | 240V/11kW | E-11 kW | S-11 | not specified | 11kw | S-11 | 11 Kilowatts | 240V/11kW | not specified | S-11 |
Is 11 kW Worth It for Your Setup?
An 11 kW rating means this heater runs on a standard 240V circuit and draws significant power to heat water instantly. You get flow rates between 1.4 and 2.6 GPM, which suits single fixtures like sinks or compact showers. It does not support whole-house use. If you need hot water for one tap, this wattage delivers steady heat. If you plan to run multiple fixtures at once, the flow will drop too low for practical use.
Worth it if
- You need reliable hot water for a single sink or compact shower
- Your electrical panel has a dedicated 50-amp, 240V breaker available
- You want compact units that fit tight spaces under counters
Skip it if
- You need to supply hot water to multiple fixtures simultaneously
- Your home lacks the required 240V electrical capacity for 11 kW loads
- You require flow rates above 2.6 GPM for full showers
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How We Picked 11 kW Units
We gathered units by scanning Amazon listings for the 11 kW wattage specification. We included only one variant per product family to avoid duplicates. Every item in this list meets that core power requirement. We did not test these heaters ourselves. All details come directly from the published specification sheets and feature lists on each product page. You can verify these specs by checking the original listings.
We ordered the results by availability first. Next, we used the listing rating weighted by review count. Finally, we sorted by how many of our criteria the specs meet. This method keeps the most relevant and accessible options at the top. The page updates stock and prices daily. We do not handle the hardware. This approach ensures you see the most practical 11 kW electric models for your space.
How to choose the right one
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Check your electrical panel
Every 11 kW unit in this guide requires a 240V circuit. You must verify your electrical panel has an available double-pole breaker. Most models, such as the WINTEMP WN11, specify a 50-amp breaker requirement. If your panel only supports 30-amp or 40-amp circuits, these units will not function correctly. Check your main service capacity before installation. Upgrading your panel adds complexity and cost. Ensure the dedicated circuit meets the manufacturer’s exact amperage listing to prevent tripping or damage.
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Measure your installation space
Dimensions vary significantly across these 11 kW heaters. The Thermomate ET110HCUS measures 7.09 by 10.6 inches, fitting tight corners. In contrast, the Garvee PTH_33HAA3LA9Ks-h is 14.2 inches square but only 2.99 inches deep. Measure the width, height, and depth of your intended location. Account for clearance around the unit for airflow and maintenance access. The Fogatti 11kw model is exceptionally narrow at 3.5 inches wide. Compare these physical specs against your cabinet or wall space to ensure a proper fit.
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Match flow rate to fixture
Flow rates determine if the heater meets your usage needs. The Westinghouse ET011CA0G delivers up to 1.4 GPM, suitable for sinks but not showers. The WINTEMP WN11 provides 2.6 GPM, handling higher demand. The Camplux TEW11-CA has a low 0.47 GPM activation threshold, meaning it only turns on with minimal flow. Check the maximum GPM rating. If you plan to use the unit for a bathroom sink, lower flow is acceptable. For handwashing stations, higher GPM ensures comfort.
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Consider smart home integration
Several models offer Wi-Fi connectivity for remote control. The Westinghouse WET011A0G and ET011CA0G include app integration. The Electrolux 11-2 model also features smart controls alongside an external scale inhibitor. If you prefer adjusting temperature from your phone, select a Wi-Fi-enabled unit. The GE GE11SNHPDG offers a 30-foot remote control instead of app connectivity. Decide if digital adjustment via an app or physical remote is more convenient for your installation location.
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Verify certification standards
Safety certifications ensure the unit meets local electrical codes. The Tesoroli RE13K model carries CSA certification, indicating compliance with specific safety standards. The Garvee PTH_33HAA3LA9Ks-h is noted as ETL-certified. Always check the product specifications for these marks before purchasing. Certification ensures the heating elements and electrical components are tested for safety. This is particularly important for electric tankless heaters installed in damp environments like bathrooms. Do not install a unit without visible certification data in its specs.
Frequently asked questions
Can an 11 kW tankless heater run a shower?
These units can support showers in warm climates or for quick handwashing in colder regions. Flow rates range from 1.4 to 2.6 GPM, which is sufficient for single-fixture use. You should not expect to power a full bathroom shower in cold weather with this wattage. The Thermomate and WINTEMP models offer higher flow for better performance.
Do 11 kW heaters require a 50-amp breaker?
Most models in this list specify a 50-amp, 240V dedicated circuit. The WINTEMP YQ-WN11K and Fogatti 11kW units explicitly require this electrical capacity. You must verify your panel has an available double-pole breaker before installation. Some compact units like the LiberLive may have lower demands, but 50 amps is the standard for full output.
Which 11 kW heater has Wi-Fi controls?
The Westinghouse WET011A0G, ET011CA0G, and WET-11K-G models feature built-in Wi-Fi for app control. The Electrolux 11-2 and ET011C also include smart integration with external scale inhibitors. These units allow you to adjust temperature settings remotely. This feature is ideal for single-fixture setups where precise digital control is preferred over manual knobs.
What is the smallest 11 kW tankless water heater?
The Fogatti 11kW Electric Tankless Water Heater has a narrow 3.5-inch width and 14.3-inch height. The GE GE11SNHPDG is also very slim at 2.4 inches deep. These compact footprints fit well in tight spaces under sinks or in small closets. The LiberLive model is the lightest at 5 pounds, making it easy to mount.
Can I use an 11 kW heater for a kitchen sink?
Yes, these units are designed specifically for point-of-use applications like kitchen sinks. The Thermomate ET110HCUS provides up to 2.15 GPM, which is adequate for washing dishes. The WINTEMP WN11 offers 2.6 GPM for faster rinsing. You should install these near the fixture to minimize heat loss in the pipes.
Do these heaters need a dedicated circuit?
Yes, every 11 kW unit requires a dedicated 240V circuit to operate safely. You cannot share this breaker with other appliances. The Electrolux and Westinghouse models draw significant power to maintain flow rates up to 2.6 GPM. Ensure your electrical panel has an available slot before purchasing to avoid tripping other breakers during peak usage.
Which heater is best for hard water?
The Electrolux 11-2 and ET011C models include an external scale inhibitor or anti-scale filter. This feature helps manage mineral buildup from hard water sources. Other units rely on standard heating elements without built-in protection. If you have hard water, the Electrolux options provide added longevity for the internal components through this specific design feature.