20 Best Under Sink Tankless Water Heater 120V (2023 Updated)

Under sink tankless water heater 120v is a type of water heater that is placed under the sink and uses 120-volt power to heat water on demand. These types of water heaters are becoming increasingly popular as they are more energy efficient than traditional water heaters and take up less space.

20 Best Under Sink Tankless Water Heater 120V

1. Bosch Tronic 3000T Series ES Point-of-Use Tankless Water Heater – Electric – 7 gal

Bosch Tronic 3000T Series ES Point-of-Use Tankless Water Heater - Electric - 7 gal

  • 7 Gallon

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Product Details

Specifications

Details
Efficiency Level Super High
Water Heater Profile Compact
Nominal Tank Capacity (gallons) 7 gal
Amperage (amps) 12 A
Application Type Point of Use

Reviews From Real Customers

eben133
JDP
KJ Handyperson

2. Marey ECO110 Electric Tankless Water Heater – 11kW

Marey ECO110 Electric Tankless Water Heater - 11kW

  • 11kw

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Camping World

Product Details

Specifications

Details
Required Volt Connection 220 volt
Application Type Residential
Indoor/Outdoor Indoor
Efficiency Level Super High
Fuel Type Electric

Reviews From Real Customers

My T.
Ronnie R.
Sam

3. Rinnai V75IN 7.5 GPM Indoor Natural GAS Tankless Water Heater

Rinnai V75IN 7.5 GPM Indoor Natural GAS Tankless Water Heater

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: High-performance up to 7.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit

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Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

Reviews From Real Customers

paris2932
Boz
Atlanta Homeowner

4. 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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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

5. 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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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

6. Airthereal Electric Tankless Water Heater for Sink and Faucet 9 KW – Endless On-Demand Hot Water

Airthereal Electric Tankless Water Heater for Sink and Faucet 9 KW - Endless On-Demand Hot Water

  • 9 Kw

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Product Details

Specifications

Details
Power Source Corded Electric
Item Dimensions LxWxH 16.14 x 9.84 x 2.6 inches
Voltage 240 Volts
Style Indoor Installation
Mounting Type Wall

Reviews From Real Customers

Earth S.
Mad M.
NWShopper007

7. Rheem RTGH-RH11DVLN Prestige Series Natural GAS Condensing Tankless Water Heater with Built-in Recirculation

Rheem RTGH-RH11DVLN Prestige Series Natural GAS Condensing Tankless Water Heater with Built-in Recirculation

  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 199, 000 BTU (gas consumed per hour)
  • Instant hot water
  • For use indoor only

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TanklessKing

Product Details

Specifications

Details
Fuel Type Natural Gas
Water Connection 3/4″
Voltage 120V
Amperage 2A
Activation GPM 0.5

Reviews From Real Customers

AquatechP
Cathie and Michael D

8. Bosch Tronic Electric Tankless Water Heater US12

Bosch Tronic Electric Tankless Water Heater US12

  • 99% efficient with minimal stand-by loss
  • Ultra compact and lightweight, saving valuable space
  • Copper heat exchanger with copper-sheathed heating elements
  • No temperature/pressure relief valve is necessary (check local codes)
  • Max 1.5 GPM

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Product Details

Specifications

Details
Item – Water Heaters Electric Tankless Water Heater
Water Heater Design Point-of-Use
Water Heater Application Undersink
Commercial / Residential Both
Watts – Water Heaters 12,000

Reviews From Real Customers

gyi151
stpeteboyz8ys4
barbarevan-26

9. Rinnai RL75iP Tankless Water Heater

Rinnai RL75iP Tankless Water Heater

  • 7.5 Gpm

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Home Depot
Wayfair
Build.com

Product Details

Specifications

Details
Pack Size 1
Fuel Type Gas
Certifications and Listings AHRI Certified CSA Certified
Finish Family Silver Metallic
Indoor/Outdoor Indoor

Reviews From Real Customers

Ricky
Steve C
Greg Heyborne

10. Stiebel Eltron Mini 4 Electric Tankless Water Heater

Stiebel Eltron Mini 4 Electric Tankless Water Heater

  • Extremely compact design saves space
  • Major energy savings
  • Unlimited supply of hot water
  • Proven reliability
  • Sleek design is appealing and can be mounted in plain sight

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Zoro

Product Details

Specifications

Details
Item – Water Heaters Electric Tankless Water Heater
Water Heater Design Point-of-Use
Water Heater Application Undersink
Commercial / Residential Commercial
Watts – Water Heaters 2900/3500

Reviews From Real Customers

milan7
Jeff P
Richard S.

11. Electric SCR2 Titan N-120 Tankless Water Heater

Electric SCR2 Titan N-120 Tankless Water Heater

  • N-120

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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

FixitForTheKids
guidera48
hesh-3091

12. Stiebel Eltron Mini 3.5 Electric Tankless Water Heater,120VAC

Stiebel Eltron Mini 3.5 Electric Tankless Water Heater,120VAC

  • Water Heaters 3, 500 W, Amps
  • Water Heaters 31 A, Voltage
  • Flow Activation 0.4 gpm, Phase
  • Range
  • Water Heaters 10 Degrees F

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WebstaurantStore.com
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Build.com

Product Details

Specifications

Details
Vent Type Vent Free
Wattage 2400W
Amperage 20A
Voltage 120V
Activation GPM 0.4

13. Rheem Minitank 120-Volt 1.5 gal. Compact Point of Use Electric Water Heater

Rheem Minitank 120-Volt 1.5 gal. Compact Point of Use Electric Water Heater

  • 120-Volt 1.5 Gal

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Uccrf

Product Details

Specifications

Details
Water Heater Profile Compact
Efficiency Level Super High
Nominal Tank Capacity (gallons) 1 gal
Fuel Type Electric
Amperage (amps) 12 A

Reviews From Real Customers

Ronny
Paulo
Snowman

14. Rheem Performance 8 KW Self-Modulating 1.55 GPM Electric Tankless Water Heater

Rheem Performance 8 KW Self-Modulating 1.55 GPM Electric Tankless Water Heater

  • Energy and cost savings: heats water only when it is needed for savings of up to 50% on water heating costs when used in a point-of-use application
  • Space savings: small compact design fits perfectly in tight places like under cabinets and sinks
  • Easy to maintain: durable easy-to-replace heating elements
  • A reliable hot water solution from Rheem the global leader in water heating
  • ETL Listed to UL-499 and CAN/CSA-C22.2 No. 64

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Product Details

Specifications

Details
Required Volt Connection 240 volt
Application Type Residential
Indoor/Outdoor Indoor
Efficiency Level Super High
Fuel Type Electric

Reviews From Real Customers

Berto
actionmaytag

15. Rheem Retex-13 KW Self-Modulating 2.54 GPM Tankless Electric Water Heater

Rheem Retex-13 KW Self-Modulating 2.54 GPM Tankless Electric Water Heater

  • Energy and cost savings: heats water only when it is needed for savings of up to 50% on water heating costs when used in a point-of-use application
  • Space savings: small, compact design fits perfectly in tight places like under cabinets and sinks
  • Easy to maintain: durable, easy-to-replace heating elements

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Product Details

Specifications

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

16. Chronomite SR-15L/120 Instant-Flow Tankless Water Heater

Chronomite SR-15L/120 Instant-Flow Tankless Water Heater

  • 120 Volt, 1, 800 W, 15

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Product Details

Specifications

Details
Watts 1800
Voltage 120VAC
Amps AC 15
Phase – Water Heaters 1
Pressure Range 45 to 150 psi

Reviews From Real Customers

Bffnnn
mbeglari

17. Titan 18 Tankless Electric Tankless Water Heater

Titan 18 Tankless Electric Tankless Water Heater

  • 18 W

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Product Details

Specifications

Details
Amps 75 amps
Brand Name Titan
Depth 4 -1/4 in.
Maximum Pressure 150 psi
Watts 18 W

Reviews From Real Customers

toyotatruckboy
chabrown_0
denkthetank2

18. Rinnai RUCS75iN 7.5 GPM Indoor Natural GAS Tankless Water Heater

Rinnai RUCS75iN 7.5 GPM Indoor Natural GAS Tankless Water Heater

  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks

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Specifications

Details
Weight 57.3 oz

Reviews From Real Customers

Nokieness3444
LaceyJub8532926
Barbee7359

19. 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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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
Bob
Becca

20. Stiebel Eltron Mini 3 110V Tankless Electric Water Heater ST576864

Stiebel Eltron Mini 3 110V Tankless Electric Water Heater ST576864

  • Size: 6 in

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Product Details

Conclusion

There are many things to consider when choosing a tankless water heater, but in the end, the 120v under sink tankless water heater is a great option for those who want an efficient and convenient way to get hot water.

This size is perfect for small households or if you only need hot water in one area of your home. Installation is easy and won’t take up a lot of space, and you’ll never have to worry about running out of hot water again.

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