10 Best electric tankless water heaters of 2025

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Rheem
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Main highlights

Compact Design and Efficiency
Small, suitcase-sized unit that saves space and energy.

Ideal for Whole House Use
Perfect for families needing continuous hot water supply.

Highly Praised Continuous Hot Water
Never run out of hot water, even with high demand.
9.8

Exceptional

Our Rating

9.5
Efficient Energy Use

9.3
Temperature control

8.2
Easy installation
How do we rank?

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Value for Money

2

EcoSmart
EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW - Quantity 1, 17 x 17 x 3.5

26% Off
Main highlights

Endless Hot Water
Provides continuous hot water on demand, never runs out.

Space-Saving Design
Compact size fits easily in limited spaces, ideal for small homes.

Energy Efficiency
99% thermal efficiency, significantly reduces energy costs.
9.7

Exceptional

Our Rating

8.2
Temperature control

8.0
Efficient Energy Use

8.0
Easy installation
3

EcoSmart
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

36% Off
Main highlights

Endless Hot Water Efficiency
Provides consistent hot water with energy-efficient self-modulating technology, maintaining temperature within 1 degree.

Compact Space Saver
Ideal for small spaces, can be wall-mounted and fits point-of-use applications.

Energy Savings Praised
Customers appreciate reduced utility bills and efficient performance in small households.
9.6

Exceptional

Our Rating

9.1
Efficient Energy Use

8.7
Easy installation

8.4
Temperature control
4

Rheem
Rheem 18kW 240V Tankless Electric Water Heater, Gray
Main highlights

Efficient Water Heating
The Rheem 18kW Tankless Electric Water Heater offers on-demand hot water with advanced self-modulation for energy savings and efficiency.

Ideal for Small Homes
Best suited for small homes or apartments needing instant hot water without the bulk of traditional tanks.

Space-Saving Design
Customers praise its compact size, freeing up space while delivering reliable hot water.
9.5

Excellent

Our Rating

8.2
Easy installation

8.2
Temperature control

8.2
Efficient Energy Use
5

Antuony
Antuony 110V Tankless Electric Water Heater,4500W Under Sink On Demand Instant Hot Water Heater,LCD Touch Screen tankless Water Heater (White)
Main highlights

Energy Efficiency and Safety
The tankless water heater features intelligent self-inspection, automatic power adjustment, and comprehensive safety measures for reliable and efficient use.

Ideal for Compact Spaces
Perfect for under-sink installation, providing instant hot water without occupying much space.

User-Friendly Digital Display
Customers praise the easy-to-read LCD display and intuitive controls for seamless operation.
9.3

Excellent

Our Rating
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6

ECOTINYMACH

ECOTINYMACH 110V Tankless Water Heater Electric, 3000W Compact Water Heater Under Sink, Conveniently Convertible Between Fahrenheit and Celsius
9.0

Excellent

Our Rating
7

Rheem
Rheem 11kW 240V Tankless Electric Water Heater
Main highlights

Digital Temperature Display
ON/OFF Dial Control with adjustable digital temperature display for precise control.

Ideal for Small Spaces
Perfect for small bathrooms and single shower use.

Consistent Hot Water
Praised for providing on-demand, consistent, and continuous hot water.
8.9

Very Good

Our Rating

9.5
Efficient Energy Use

8.2
Temperature control

8.0
worth the money
8

WINTEMP
Electric Tankless Water Heater WINTMP, 27kW 240V Whole House Hot Water Supply Shower, Self-Regulating on-Demand Hot Water, with LED Temperature Display and WIFI Control, Space-Saving WN27
Main highlights

Energy Efficient On-Demand Heating
Automatically adjusts energy use for stable, efficient heating.

Perfect for Residential Showers
Ideal for homes needing continuous hot water without preheating.

Highly Praised Safety Features
Equipped with overheat, leakage, and dry-fire protections.
8.7

Very Good

Our Rating
9

Generic
Generic Tankless Water Heater Electric, Instant Hot Water Heater Under Sink, 3000W 110V On Demand Mini Water Heater for RV Kitchen Bathroom, White
Main highlights

Instant Heating Efficiency
With 3000W power, this heater provides hot water instantly, adjustable between 68-122°F.

Space-Saving Design
Ideal for compact spaces like kitchens, bathrooms, RVs, ensuring convenience in limited areas.

Lukewarm Water Performance
Users appreciate its capability for providing lukewarm water, suitable for kitchen use.
8.6

Very Good

Our Rating

8.0
Easy installation

8.0
Temperature control
10

Ranein
Ranein 13kW Tankless Electric Water Heater, 240V on Demand Instant Endless Water Heater with LED Temperature Display for Whole House Shower
Main highlights

Energy Efficient and Cost Saving
The 13kW tankless water heater saves 60% on heating costs with no preheating needed.

Ideal for Small Households
Provides up to 3.1 GPM flow rate, perfect for 1-2 usage points.

User-Friendly Temperature Control
Features knob controls and an LED display for easy temperature adjustments.
8.5

Good

Our Rating

10 Best electric tankless water heaters of 2025

1

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

9.5

9.3

8.2

How do we rank?

How do we rank?

Analyzing top stores

2

EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW - Quantity 1, 17 x 17 x 3.5

8.2

8.0

8.0

3

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

9.1

8.7

8.4

4

Rheem 18kW 240V Tankless Electric Water Heater, Gray

8.2

8.2

8.2

5

Antuony 110V Tankless Electric Water Heater,4500W Under Sink On Demand Instant Hot Water Heater,LCD Touch Screen tankless Water Heater (White)

6

ECOTINYMACH 110V Tankless Water Heater Electric, 3000W Compact Water Heater Under Sink, Conveniently Convertible Between Fahrenheit and Celsius

7

Rheem 11kW 240V Tankless Electric Water Heater

9.5

8.2

8.0

8

Electric Tankless Water Heater WINTMP, 27kW 240V Whole House Hot Water Supply Shower, Self-Regulating on-Demand Hot Water, with LED Temperature Display and WIFI Control, Space-Saving WN27

9

Generic Tankless Water Heater Electric, Instant Hot Water Heater Under Sink, 3000W 110V On Demand Mini Water Heater for RV Kitchen Bathroom, White

8.0

8.0

10

Ranein 13kW Tankless Electric Water Heater, 240V on Demand Instant Endless Water Heater with LED Temperature Display for Whole House Shower

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