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20 Best Electric Tankless Water Heater For Whole House (2022 Updated)

An electric tankless water heater is a whole-house water heating system that uses electricity to heat water on demand. Tankless water heaters are more energy-efficient than traditional tank water heaters because they only heat water when it is needed, rather than continuously heating and storing water in a tank.

Electric tankless water heaters are also smaller and take up less space than tank water heaters.

20 Best Electric Tankless Water Heater For Whole House

Product Image Product Name Features Price

Ecosmart 27 Tankless Electric Water Heater

  • 27kw

Stiebel Eltron Tempra 29 Electric Tankless Water Heater

  • 29

Bosch 7736505871 Thermotechnology Tronic 3000 9.5 kW/240 Volt Electric Tankless Water Heater

  • 9.5 Kw

Black & Decker 24 KW 4.68 GPM Electric Tankless Water Heater

  • 24 Kw

Rheem Performance 18 KW Self-Modulating 3.5 GPM Electric Tankless Water Heater

  • 18kw

Electric SCR2 Titan N-120 Tankless Water Heater

  • N-120

Marey ECO150 Electric Tankless Water Heater – 14.6 KW

  • 14.6 Kw

Airthereal Electric Tankless Water Heater (Open Box) – Endless On-Demand Hot Water

  • 18 Kw

Stiebel Eltron Tempra 24 Plus Tankless Electric Water Heater

  • 24 Plus Tankless

Ecosmart Eco 11 Electric Tankless Water Heater

  • Provides continuous hot water for ultimate convenience.
  • Patented Self Modulating technology and design.

Ecosmart ECO18 Electric Tankless Water Heater – 18 KW – 240 V

  • 18kw

Rheem RTEX-13 Professional Classic Electric Tankless Hot Water Heater

  • 13kw

Rheem Performance 24 KW Self-Modulating 4.6 GPM Electric Tankless Water Heater

  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink

Tankless Water Heater,3/4 inch Npt,14-1/2 inch H, Size: 4 in 239214

  • Water Heaters 10,800/14,400, Amps.
  • Water Heaters 60 A, Voltage.
  • Water Heaters 208/240, Min. Flow Activation 0.5 gpm, Phase.

Electric Tankless Water Heater,18,000W, Size: 4 in RTEX-18

  • Water Heaters 18,000 W, Amps.
  • Water Heaters 75 A, Voltage.
  • Water Heaters 208/240, Min. Flow Activation 0.3 gpm, Phase.

Rheem RTEX-36 208/240 VAC, Both Electric Tankless Water Heater, General

  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink

Electric Tankless Water Heater,8000W, Size: 2 in RTEX-08

  • Water Heaters 8,000 W, Amps.
  • Water Heaters 33 A, Voltage.
  • Water Heaters 240, Min. Flow Activation 0.3 gpm, Phase.

Rheem 8KW Electric Instantaneous Water Heater RTEX-08

  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink

Bosch Tronic 3000 Electric Tankless Water Heater US9

  • Water Heaters 9500, Amps.
  • Water Heaters 40, Voltage.
  • Water Heaters 208/240, Min. Range.

Stiebel Eltron Tempra 15 Plus Electric Tankless Water Heater

  • 15
Ecosmart 27 Tankless Electric Water Heater
  • 27kw
Stiebel Eltron Tempra 29 Electric Tankless Water Heater
  • 29
Bosch 7736505871 Thermotechnology Tronic 3000 9.5 kW/240 Volt Electric Tankless Water Heater
  • 9.5 Kw
Black & Decker 24 KW 4.68 GPM Electric Tankless Water Heater
  • 24 Kw
Rheem Performance 18 KW Self-Modulating 3.5 GPM Electric Tankless Water Heater
  • 18kw
Electric SCR2 Titan N-120 Tankless Water Heater
  • N-120
Marey ECO150 Electric Tankless Water Heater – 14.6 KW
  • 14.6 Kw
Airthereal Electric Tankless Water Heater (Open Box) – Endless On-Demand Hot Water
  • 18 Kw
Stiebel Eltron Tempra 24 Plus Tankless Electric Water Heater
  • 24 Plus Tankless
Ecosmart Eco 11 Electric Tankless Water Heater
  • Provides continuous hot water for ultimate convenience.
  • Patented Self Modulating technology and design.
Ecosmart ECO18 Electric Tankless Water Heater – 18 KW – 240 V
  • 18kw
Rheem RTEX-13 Professional Classic Electric Tankless Hot Water Heater
  • 13kw
Rheem Performance 24 KW Self-Modulating 4.6 GPM Electric Tankless Water Heater
  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink
Tankless Water Heater,3/4 inch Npt,14-1/2 inch H, Size: 4 in 239214
  • Water Heaters 10,800/14,400, Amps.
  • Water Heaters 60 A, Voltage.
  • Water Heaters 208/240, Min. Flow Activation 0.5 gpm, Phase.
Electric Tankless Water Heater,18,000W, Size: 4 in RTEX-18
  • Water Heaters 18,000 W, Amps.
  • Water Heaters 75 A, Voltage.
  • Water Heaters 208/240, Min. Flow Activation 0.3 gpm, Phase.
Rheem RTEX-36 208/240 VAC, Both Electric Tankless Water Heater, General
  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink
Electric Tankless Water Heater,8000W, Size: 2 in RTEX-08
  • Water Heaters 8,000 W, Amps.
  • Water Heaters 33 A, Voltage.
  • Water Heaters 240, Min. Flow Activation 0.3 gpm, Phase.
Rheem 8KW Electric Instantaneous Water Heater RTEX-08
  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink
Bosch Tronic 3000 Electric Tankless Water Heater US9
  • Water Heaters 9500, Amps.
  • Water Heaters 40, Voltage.
  • Water Heaters 208/240, Min. Range.
Stiebel Eltron Tempra 15 Plus Electric Tankless Water Heater
  • 15

1. Ecosmart 27 Tankless Electric Water Heater

Ecosmart 27 Tankless Electric Water Heater

  • 27kw

Check Latest Price

Sold By Price
Amazon.com
eBay
Walmart
Ace Hardware

Product Details

Specifications

Details
Assembled Depth (in) 3.75 in
Assembled Height (in) 18 in
Assembled Width (in) 17 in
Assembled Weight (lbs) 13.75 lbs
Item is Shipped at this Packaging Level Y

2. Stiebel Eltron Tempra 29 Electric Tankless Water Heater

Stiebel Eltron Tempra 29 Electric Tankless Water Heater

  • 29

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Sold By Price
Amazon.com
Global Industrial
Build.com
Ventingpipe.com

Product Details

Specifications

Details
Temperature (Minimum) 68° F
Temperature (Maximum) 140° F
Vent Type Vent Free
Amperage 120A
Voltage 240V

3. Bosch 7736505871 Thermotechnology Tronic 3000 9.5 kW/240 Volt Electric Tankless Water Heater

Bosch 7736505871 Thermotechnology Tronic 3000 9.5 kW/240 Volt Electric Tankless Water Heater

  • 9.5 Kw

Check Latest Price

Sold By Price
Amazon.com
eBay – luckyluciano711
Home Depot
Wayfair

Product Details

Specifications

Details
Indoor/Outdoor Indoor
Efficiency Level High
Fuel Type Electric
Amperage (amps) 40 A
Application Type Point of Use

Reviews From Real Customers

Boggscy

4. Black & Decker 24 KW 4.68 GPM Electric Tankless Water Heater

Black & Decker 24 KW 4.68 GPM Electric Tankless Water Heater

  • 24 Kw

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Amazon.com – Seller
Walmart
Lowe’s
Tractor Supply Company

Product Details

Specifications

Details
Weight (lbs.) 15
Amps Required for Unit Only (Amps) 100
Bluetooth Compatibility No
Smart Compatible No
Major Appliances Supplied Simultaneously 4

5. Rheem Performance 18 KW Self-Modulating 3.5 GPM Electric Tankless Water Heater

Rheem Performance 18 KW Self-Modulating 3.5 GPM Electric Tankless Water Heater

  • 18kw

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Sold By Price
Amazon.com – Seller
eBay
Home Depot
BUYA.COM – Buya – Mid Valley Pawn

Product Details

Specifications

Details
Required Volt Connection 240 volt
Application Type Residential
Indoor/Outdoor Indoor
Fuel Type Electric
Number of Showers 1-2

Reviews From Real Customers

Louis Murray
jesse patterson
Ziggy Moo

6. Electric SCR2 Titan N-120 Tankless Water Heater

Electric SCR2 Titan N-120 Tankless Water Heater

  • N-120

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Sold By Price
Amazon.com – Seller
eBay
Walmart
Shell Lumber and Hardware

Product Details

Specifications

Details
Depth 3 in.
Brand Name Titan
Amps 54 amps
Watts 11.8 W
Maximum Pressure 150 psi

Reviews From Real Customers

deepend55
utbands

7. Marey ECO150 Electric Tankless Water Heater – 14.6 KW

Marey ECO150 Electric Tankless Water Heater - 14.6 KW

  • 14.6 Kw

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Amazon.com
eBay
Walmart
FactoryPure

Product Details

Specifications

Details
No need for pre-heating instant tankless water heater on demand heating.
Fuel Type Electric
Tankless Yes
Installation Indoor
Volts 240 Volts

8. Airthereal Electric Tankless Water Heater (Open Box) – Endless On-Demand Hot Water

Airthereal Electric Tankless Water Heater (Open Box) - Endless On-Demand Hot Water

  • 18 Kw

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Sold By Price
Amazon.com – Seller
eBay – hydroelectronics2017
Airthereal

Product Details

Specifications

Details
Power Source Corded Electric
Item Dimensions LxWxH 17.25 x 12.22 x 3.43 inches
Voltage 240 Volts
Style Indoor Installation
Mounting Type Wall

9. Stiebel Eltron Tempra 24 Plus Tankless Electric Water Heater

Stiebel Eltron Tempra 24 Plus Tankless Electric Water Heater

  • 24 Plus Tankless

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Sold By Price
Amazon
SupplyHouse.com
PoshHaus
Wholesale Home

Product Details

Specifications

Details
Temperature (Minimum) 68° F
Temperature (Maximum) 140° F
Vent Type Vent Free
Amperage 100A
Voltage 240V

10. Ecosmart Eco 11 Electric Tankless Water Heater

Ecosmart Eco 11 Electric Tankless Water Heater

  • Provides continuous hot water for ultimate convenience.
  • Patented Self Modulating technology and design.

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
Ace Hardware

Product Details

Specifications

Details
Assembled Depth (in) 3.75 in
Assembled Height (in) 12 in
Assembled Width (in) 9.75 in
Assembled Weight (lbs) 7 lbs
Item is Shipped at this Packaging Level Y

11. Ecosmart ECO18 Electric Tankless Water Heater – 18 KW – 240 V

Ecosmart ECO18 Electric Tankless Water Heater - 18 KW - 240 V

  • 18kw

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Amazon
eBay
Walmart
Ace Hardware

Product Details

Specifications

Details
Packaging Depth 6.25 IN
Packaging Height 19.5 IN
Packaging Width 16.25 IN
Package Weight 11
Package Weight UOM LB

12. Rheem RTEX-13 Professional Classic Electric Tankless Hot Water Heater

Rheem RTEX-13 Professional Classic Electric Tankless Hot Water Heater

  • 13kw

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Sold By Price
Amazon
Wholesale Water Heaters & More
Miami Water Heater
Sears – Ami Ventures Inc

Product Details

Specifications

Details
Water Heater Design Whole House
Water Heater Application General Purpose
Commercial / Residential Commercial/Residential
Watts – Water Heaters 13,000 W
Amps – Water Heaters 54 A

13. Rheem Performance 24 KW Self-Modulating 4.6 GPM Electric Tankless Water Heater

Rheem Performance 24 KW Self-Modulating 4.6 GPM Electric Tankless Water Heater

  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink
  • 0.5 GPMKitchen Sink
  • 1 to 2 GPMBath Tub

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Sold By Price
Amazon
eBay – homedealss
Home Depot

Product Details

Specifications

Details
Amperage (amps) 100 A
Application Type Residential
Electricity Phase Single Phase
Finish Family Gray
Flow Rate @ 35°F Rise (gallons/min) 4.68 gal (US)/min

14. Tankless Water Heater,3/4 inch Npt,14-1/2 inch H, Size: 4 in 239214

Tankless Water Heater,3/4 inch Npt,14-1/2 inch H, Size: 4 in 239214

  • Water Heaters 10,800/14,400, Amps.
  • Water Heaters 60 A, Voltage.
  • Water Heaters 208/240, Min. Flow Activation 0.5 gpm, Phase.
  • Water Heaters 1, Temp. Range.
  • Water Heaters 70 Degrees to 140 Degrees F, Water Connection 3/4 in NPT, Temp.

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Sold By Price
Amazon
Walmart – Aprive Inc

Product Details

15. Electric Tankless Water Heater,18,000W, Size: 4 in RTEX-18

Electric Tankless Water Heater,18,000W, Size: 4 in RTEX-18

  • Water Heaters 18,000 W, Amps.
  • Water Heaters 75 A, Voltage.
  • Water Heaters 208/240, Min. Flow Activation 0.3 gpm, Phase.
  • Water Heaters 1, Temp. Range.
  • Water Heaters 80 Degrees to 140 Degrees F, Water Connection 3/4 in NPT, Temp. Rise @ 6.0 GPM Limited to Thermostatic Setting, Temp. Rise @ 2.5 GPM.

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Amazon
Build.com
Wayfair
GadgetsGo

Product Details

16. Rheem RTEX-36 208/240 VAC, Both Electric Tankless Water Heater, General

Rheem RTEX-36 208/240 VAC, Both Electric Tankless Water Heater, General

  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink
  • 0.5 GPMKitchen Sink
  • 1 to 2 GPMBath Tub

Check Latest Price

Sold By Price
Amazon
Neobits.com

Product Details

Specifications

Details
Item Width 24.300
Item Height 7.600
Country/Region of Manufacture CN
Style Electric Tankless Water Heater
Length 24.300

17. Electric Tankless Water Heater,8000W, Size: 2 in RTEX-08

Electric Tankless Water Heater,8000W, Size: 2 in RTEX-08

  • Water Heaters 8,000 W, Amps.
  • Water Heaters 33 A, Voltage.
  • Water Heaters 240, Min. Flow Activation 0.3 gpm, Phase.
  • Water Heaters 1, Temp. Range.
  • Water Heaters 22 Degrees F

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Sold By Price
Amazon
Walmart – Aprive Inc

Product Details

18. Rheem 8KW Electric Instantaneous Water Heater RTEX-08

Rheem 8KW Electric Instantaneous Water Heater RTEX-08

  • up to 6 GPMWater-Saver Shower Head
  • 1.5 GPMStandard Shower Head
  • 2.0 GPMStandard Hand Sink
  • 0.5 GPMKitchen Sink
  • 1 to 2 GPMBath Tub

Check Latest Price

Sold By Price
Amazon
Wayfair
GadgetsGo

Product Details

19. Bosch Tronic 3000 Electric Tankless Water Heater US9

Bosch Tronic 3000 Electric Tankless Water Heater US9

  • Water Heaters 9500, Amps.
  • Water Heaters 40, Voltage.
  • Water Heaters 208/240, Min. Range.
  • Water Heaters 26 Degrees F, Temp.

Check Latest Price

Sold By Price
Amazon
eBay – imagenit
SupplyHouse.com

Product Details

Specifications

Details
Assembled Height 6 in.
Amperage 40 are
Warranty 5 year
Wall Mountable Yes
Commercial or Residential Commercial and Residential

Reviews From Real Customers

mrprinterok

20. Stiebel Eltron Tempra 15 Plus Electric Tankless Water Heater

Stiebel Eltron Tempra 15 Plus Electric Tankless Water Heater

  • 15

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Amazon
WebstaurantStore.com
24hr Supply
E-Tankless Water Heaters

Product Details

Specifications

Details
Preset Temperature Memory Buttons Yes
Flow Rate Monitor Yes
Energy Monitor Showing Cost Savings Yes
Hinged Case Yes
Power (KW) 14.4 KW @ 240v / 10.8 KW @ 208v

Reviews From Real Customers

krs3828
Living Direct
Person I.

Conclusion

An electric tankless water heater is an excellent choice for a whole-house water heater. It is more efficient than a traditional tank water heater, and it will save you money on your energy bills. It is also more environmentally friendly, because it doesn’t use any fossil fuels.

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