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20 Best Electric On Demand Hot Water Heater (2022 Updated)

A electric on demand hot water heater is a type of water heater that uses electricity to heat water on demand. This type of water heater is typically more expensive to operate than other types of water heaters, but it can be more energy efficient and may have other benefits.

20 Best Electric On Demand Hot Water Heater

1. Stiebel Eltron Tempra 36 Plus Whole House Electric Tankless Water Heater

Stiebel Eltron Tempra 36 Plus Whole House Electric Tankless Water Heater

  • 36 Plus Tankless

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Home Depot
TanklessKing
Wholesale Home

Product Details

Specifications

Details
Temperature (Minimum) 68° F
Temperature (Maximum) 140° F
Vent Type Vent Free
Amperage 150A
Voltage 240V

Reviews From Real Customers

ChristianMC
Sklewis
Brian Lackie

2. Ecosmart 27 Tankless Electric Water Heater

Ecosmart 27 Tankless Electric Water Heater

  • 27kw

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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

Reviews From Real Customers

Juan Carlos Garcia
Mario Consuegra
TheBoop

3. Stiebel Eltron DHC-E 12 Electric Tankless Water Heater

Stiebel Eltron DHC-E 12 Electric Tankless Water Heater

  • Serves 2 sinks + 1 shower
  • Simple and secure operation
  • Easy and quick installation
  • Works even with low water pressure
  • Constant temperature up to the output limit

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Wholesale Home
Tank The Tank
E-Tankless Water Heaters

Product Details

Specifications

Details
Vent Type Vent Free
Amperage 50A
Voltage 240V
Activation GPM 0.264
Maximum Flow Rate 2 GPM

Reviews From Real Customers

Johnny
fgendreau
Tim the Toolman Taylor

4. Bosch Tronic 3000 Electric Tankless Water Heater US3-2R

Bosch Tronic 3000 Electric Tankless Water Heater US3-2R

  • “New low activation flow rate: A new lower activation flow rate of only 0.3 GPM allows for use with newer
  • low flow faucets”
  • “Easy installation: can be installed in a 360 degree orientation so you can position the unit in tight under counter spaces for a flexible
  • worry-free setup”
  • “Ideal size: measures 6.6-in x 12.8-in x 2.9-in

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Home Depot

Product Details

Specifications

Details
Warranty 5 year
Power Source Electric
Commercial or Residential Residential or Commercial
Product Type Tankless Water Heater
Maximum Pressure 150 psi

Reviews From Real Customers

GarrettU
Saj1234

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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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. 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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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

Reviews From Real Customers

Andy A.
My T.
Ronnie R.

7. Marey 2.0 GPM Electric Tankless Water Heater Power Pak – 220-Volt

Marey 2.0 GPM Electric Tankless Water Heater Power Pak - 220-Volt

  • Ideal for a point of use water heating.
  • Saves significant water, electricity and space.
  • Requires very little water pressure for activation.
  • Easy management and simple adjustments.
  • Filter in the water inlet protects the unit from damaging sediments.

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Walmart
Lowe’s

Product Details

Specifications

Details
Fuel Type Electric
Tankless Yes
Gallons Per Minute 2 Gallons
Installation Indoor
Volts 220 Volts

Reviews From Real Customers

deltafyr
spyderwebb2d6y
dbad.ba.g2vkue5

8. Eemax SPEX2412 FlowCo Electric Tankless Water Heater

Eemax SPEX2412 FlowCo Electric Tankless Water Heater

  • 120 Volt, 2, 400 W, 20

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Amazon.com
eBay
SupplyHouse.com
Grainger Industrial Supply

Product Details

Specifications

Details
Amperage 20 A
Voltage 120 V
Kilowatts 2.4 kW
Fuel Type Electric
Water Connection 3/8″

Reviews From Real Customers

Pool Buddy
Claude
Ferguson

9. Titan Electric Tankless Water Heater N-160

Titan Electric Tankless Water Heater N-160

  • N-160

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Amazon.com – Seller
Home Depot
Tank The Tank
The BuildClub

Product Details

Specifications

Details
Energy Star Certified Yes
Product Type Tankless Water Heater
Width 7 in.
Power Source Electric
Amps 66 amps

Reviews From Real Customers

FixitForTheKids
guidera48
hesh-3091

10. Stiebel Eltron Tempra 36 Trend Whole House Electric Tankless Water Heater

Stiebel Eltron Tempra 36 Trend Whole House Electric Tankless Water Heater

  • 36

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Amazon
eBay
Home Depot
Global Industrial

Product Details

Specifications

Details
Temperature (Minimum) 68° F
Temperature (Maximum) 140° F
Vent Type Vent Free
Amperage 150A
Voltage 240V

Reviews From Real Customers

Matt M
Key west FL
BandM

11. 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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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

Reviews From Real Customers

asta
DarrylM
nonya

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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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. 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.

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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

Reviews From Real Customers

richardtp727
Shane McDoogle
lawraus2014

14. 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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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

Reviews From Real Customers

Eddy
dennis3456
Matthew Easter

15. Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater

Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater

  • Tempra tankless electric water heaters must be correctly sized and you should consult the sizing guide to determine the correct model for you
  • Requires 240 Volt or 208 Volt electric service, and has a maximum output of 28,800 Watts at 240 Volts or 21,600 Watts at 208 Volts
  • Supplies endless hot water at a constant and steady temperature from 68 to 140°F (20-60°C) that can be set on the front panel digital display
  • 99% efficient and typically result in savings of 15-20% in comparison with electric tank water heaters
  • Smart microprocessor technology unique to Tempra water heaters delivers steady water temperature even when flow rate vary as taps are adjusted

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Amazon
eBay – mediawaveonline
WebstaurantStore.com
E-Tankless Water Heaters

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

Reviews From Real Customers

Grumpy

16. 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

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Wayfair
GadgetsGo

Product Details

17. 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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Build.com
Wayfair
GadgetsGo

Product Details

18. Electric Tankless Water Heater,24,000W, Size: 4 in RTEX-24

Electric Tankless Water Heater,24,000W, Size: 4 in RTEX-24

  • Water Heaters 24,000 W, Amps.
  • Water Heaters 100 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 27 Degrees F, Temp. Rise @ 2.5 GPM.

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Walmart – Aprive Inc
Wayfair
Neobits.com

Product Details

19. Stiebel Eltron 239215 Tankless Water Heater,19200W,8/2 AWG

Stiebel Eltron 239215 Tankless Water Heater,19200W,8/2 AWG

  • Water Heaters 19″, “200 W”, “Amps.
  • Water Heaters 80″, “Voltage.
  • Water Heaters 208/240″, “Min. Flow Activation 0.5 gpm”, “Phase.
  • Water Heaters 1″, “Temp. Range.
  • Water Heaters 52 Degrees F”]Power Source: N/AVoltage: N/AColor: N/AItem Width: 19.

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PoshHaus
Craft Supply Corp.

Product Details

Reviews From Real Customers

Dale PA

20. Bosch WH17 Tankless Water Heater – Electric

Bosch WH17 Tankless Water Heater - Electric

  • CONVENIENT TANKLESS HOT WATER HEATER: 17.3 kW tankless whole house electric water heater provides hot water when needed, for as long as needed
  • EASY INSTALLATION: Can be installed virtually anywhere for commercial or residential applications
  • CONSISTENT TEMPERATURE: Polymer encased elements & built-in flow sensor ensures constant output temperature
  • STABILITY & CONTROL: External temperature control knob & superior temperature stability and control
  • GREAT EFFICIENCY: 97% thermal efficiency with minimal stand-by loss

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AF Supply

Product Details

Specifications

Details
Power Source Electric
Product Type Tankless Water Heater
Commercial or Residential Residential or Commercial
Amperage 80 are
Assembled Width 8-1/2 in.

Reviews From Real Customers

Friendly Lance

Conclusion

The bottom line is that electric on-demand hot water heaters are very efficient, much more so than traditional storage tank heaters. They’re also very convenient because you never have to worry about running out of hot water.

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