Our Top 15 Recommendations:
Our Favorite 120 Volt Tankless Water Heater Reviews:
Bestseller No. 1 
Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted
- CONVENIENT HOT WATER HEATER: 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 10.75 D Inches
- LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (Amps 12A, Volts (VAC) 120)
- INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
- FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time)
- EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at the sink to provide hot water
Bestseller No. 2 
Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, [email protected], 6 x 11 x 3 Inch
- Can provide hot water for one sink at 0.5 GPM in warmer climates
- Requires 1 x 30 amp breaker and 10 AWG wire
- For one sink at 0.5 GPM in colder climates the POU 6 is recommended
- Amperage Draw 29 amp. kW - 3.5 kW
- Connection Fittings 1/2" NPT
Bestseller No. 3 
Rheem 3.5kW 120V Point of Use Tankless Electric Water Heater
- Compact and stylish with digital temperature control in increments of 1f ranging from 80f to 140f
- RTEX04 and RTEX06 only show output temperature and are non thermostatically controlled
SaleBestseller No. 4 
Tankless Water Heater Electric, thermomate 3.5kW 120V Hard Wired Point of Use On Demand Hot Water Heater Self Modulating ET035 (NO PLUG)
- Instant Heating - 24 hours ready to continuously supply instantaneous hot/warm water at preset temperature throughout your home only when needed. NO standby energy consumption. NO wait for tank to fill up. MUST HARD WIRED, NO PLUG. Drawing only 110-120 Volts
- Space Savings - 7.8W×6.3H×3.9D inch, compact small Point of Use water heater designed for Single Sink use, wall mounted fitting in small spaces throughout kitchen closet, bathroom sink, hair salons, bar counters and hotel receptions. Temperature ranges from 85°F- 131°F
- Self Modulating - On demand water heater automatically adjust the power based on the change of inlet water flow and temperature, saving up to 50% energy consumption and preventing over-heating.
- Safe & Healthy - ETL certified and equipped with Multiple Protection from leakage, dry fire, over-heating and over pressure. IP25 waterproof. Stainless steel heating element and no storage water, preventing sediment / scale build-up.
- User Friendly - Touch control panel and digital temperature display, easy to set your desired temp. Lightweight and easy to install vertically facing up or down. Open tap to start the unit heating with activation flow rate of 0.4GPM.
Bestseller No. 5 
GE APPLIANCES 3.5 kW 120v Tankless Water Heater | Electric Water Heater with Digital Temperature Control | 3500 Watts | 0.7 Gallons per Minute, Diamond Gray (GE04SNLPDG)
- UNLIMITED HOT WATER ON DEMAND - Tankless electric water heater provides instant, continuous water flow
- POINT OF USE - Installs at the point of use, for hot water where you need it
- PERFORMANCE UP TO 0.7 GALLONS PER MINUTE (GPM) - Enough to run 1 faucet in multiple climates (*Results are based on 72˚F inlet water temperature and 105˚F outlet water temperature)
- INTUITIVE DESIGN & REMOTE CONTROL - Adjust temperature and settings with easy-use touch screen or conveniently change temperature settings and control your unit from up to 30' away
- ENERGY EFFICIENT - Conserves energy and water by only using energy when hot water is in use, saving you money
SaleBestseller No. 6 
Stiebel Eltron 231045 Mini 2 Point of Use Tankless Electric Water Heater, 1.8 kW, 120V, 7-1/2" W x 6-1/2" H x 3-1/4" D
- Extremely compact design saves space
- Sleek design is appealing and can be mounted in plain sight
- Minimum flow to activate unit: 0.21 GPM 0.8 l/min and internally restricted to 0.32 GPM
- Major energy savings
- Warranty: 7 years against leakage and 3 years against defects in workmanship & materials
Bestseller No. 7 
Camplux Tankless Water Heater Electric with LED Display 120V Instant Water Heaters Under Sink 3.5kw TE04
- Smart&Considered Design: Small water heater designed with smart touch control & LED display, mini size, perfect for under sink installation. The minimum water flow for activation just need 0.4 GPM (Only for one sink)
- Multi-angled Mounting: The compact size instant electric water heater requires a connection of 1* 40A circuit breaker & 8 AWG wire. Install close to outlet for energy saving. Can be mounted Multi-angled, ideal for kitchen, wet bars, school, hospital, hair salon and boats. Please make sure it is the right size for you: 3.5kW at 120V, product dimensions 7.8" x 6.3" x 3.9", water pipes fitting: 1/2" NPT male
- Reliable&Durble: The 3.5kW tankless water heater comes with 5 protections. NFS approved, offer lead-free water. ETL safety certified, leakage and overheat protection device to ensure your safety. Stainless steel and copper component for high efficiency and durability
- Consistent Hot Water -On demand water heater only heats the water when you need it and no waiting for preheat.The temperature rise of 1.0 GPM is 22°F. Easy to get hot water between 85°F - 194°F in seconds. Enjoy instant and endless hot water
- Rotatable LED Display: 120V tankless water heater features an upgrade rotatable digital temperature display and touch control panel, show you the easy reading output water temperature at real-time and setting ideal temperature just by finger. Note: This mini water heater is only suitable for sink use, not for bathing
Bestseller No. 8 
Eemax SP3512 Electric Tankless Water Heater, 120V 3.5 kW, Only for 0.5 GPM sinks
- Ease of installation - No T and P valve needed - Only bring one cold water line to lavatory
- Connections: 3/8-Inch compression fittings at top of unit
- Voltage: 120V, Power: 3. 5kW
- Temperature rise at . 5GPM = 48 Degree Fahrenheit, Turn on: 0. 5. Dimensions: 10. 75-Inch W x 5. 25-Inch H x 3-Inch D
- Amperage: 29
SaleBestseller No. 9 
Ecosmart ECO MINI 2.5 2.5-Gallon 120V Electric Mini Tank Water Heater
- Sleek and compact design with digital output temperature display
- ECOSMART tankless water heaters are 99.8-percent energy efficient
- Manufactured in United States
- Stores up to 2.6 Gallons of water to supply hot water. Easy installation requires appliance line cord included plug. Requires no venting, unit can be installed directly at the point-of-use
- 12 A
Bestseller No. 10 
110V-120V 1.5Kw Electric Tank Hot 2.5 Gallon Water Heater Storage，Small Under Sink Counter RV TR Endless Trailer Kitchen Compact Point-of-Use,1 PCs 16” Long 1/2”FIP Stainless Steel Water Hoses 9.5L
- 【SAFE DURABLE & LONGEVITY】Made of stainless steel and never rust，Anti-leakage plug，Multiple safety protection functions protect you from the risk of scald, leakage or other injury.Premium plastic shell is corrosion resistant，This mini hot water heater is ideal for kitchen, bar, school, hospital, community and RV.
- 【SMART INVERTER FOR ENERGY SAVING】Automatic heat preservation and storage of hot water, 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%，Maximum temperature149℉，The built-in smart chip heats up to the temperature you set, and automatically Insulation when heated to the specified temperature.
- 【EASY TO USE】storage tank electric water heater with easy-to-operate knob temperature adjustment design，Easy to control warmth.Vent valve, Tee pipeline， pipes and other accessories are complete for quick installation without additional expenses or preparing time of accessories.
- 【FAST RECOVERY RATE】Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time，8-15 minutes to heat to your desired temperature).
- 【COMPACT DESIGN】Can be shelf, wall or floor mounted (Water inlet and outlet upward); Dimensions: 13.0''L x11.4''W x10.6''H; 9.5lbs; 1/2″NPT NPT. 1.5 kW, 110-220 volts. One-year warranty and 24H customer service support, feel free to contact us.
Bestseller No. 11 
Stiebel Eltron 200067 DHX 3.5-1 Trend Point-of-Use Tankless Electronic Water Heater, 120V, 3500 Watts , White
- Direct coil heating system; 3i Technology: Flow sensor, inlet and outlet temperature sensors
- Fully electronic temperature control; LCD screen and digital temperature adjustment
- Self-modulating energy saving technology; Adjustable output temperature from 68 - 140 F
- Selectable anti-scalding limits of 109, 122, or 131 F; Integrated AE3 safety system
- IP 24 water resistance rating; Can be used as a booster
Bestseller No. 12 
Eccotemp fvi12-NG FVI-12 Natural Gas, 3.5 GPM, High Capacity Tankless Water Heater, White
- Whole home indoor, gas powered tankless water heater, rated at 3.6 GPM that activates only when in use, making it an energy saver.
- For indoor installation with safe, efficient power ventilation and perfect for any small home, cabin or apartment.
- Easy to read digital temperature display, on a compact and space-saving design with minimal noise output.
- Safe electronic ignition system; plugs into standard 120v electrical outlet with UL-listed cord.
- Uses standard 1/2" NPT water fittings and is equipped with easy to use manual water temperature controls.
Bestseller No. 13 
Vuirrm Tankless Water Heater,3 Seconds Fast Heating 120V 3500W Mini Water Heater,with/LED Touch Control -Suitable for Bathing in The Bathroom,Washing Dishes in The Kitchen,Washing Vegetables
- 【Safe and Durable】Internal 304 stainless steel heating system of tankless water heater, never rust, leak-proof plug, multiple safety protection functions protect you from the risk of scalding, water leakage or other injuries. High quality plastic case.
- 【tankless electric heater】3 seconds fast heating without waiting for hot water for a long time, on demand hot water heater electric is not working when it is not needed, saving you money.
- 【Energy Saving Smart Inverter】Digital display, no need to store water, our tankless electric heater is suitable for your bathroom shower, bath, under the kitchen sink, providing hot water where you need it. The 3500w high-power heating efficiency is 98%, and the built-in smart chip is heated to the temperature you set without interruption.
- 【Easy to use】The electric tankless water heater uses easy-to-operate LED touch buttons to adjust the temperature. The design is simple and beautiful. [Note] Add water first and then power on (otherwise it will damage the water heater and cannot be installed horizontally).
- 【Wide Use】small water heater Stylish tankless water heater electric compact like a shoe box, can be installed at any point of use to avoid wasting energy and water, this mini water heater is perfect for single shower, kitchen faucets, bars, schools, hospitals Ideal for , community, hair salon, RV.
Bestseller No. 14 
2400W Electric Tankless Water Heater, 120VAC
- Price For: Each Includes: Compression Fittings, Faucet Flow Controls Item: Electric Tankless Water Heater Features: 99% Energy Efficient, Compact Size, Easy to Install, Low Installation Cost, Unlimited Hot Water Watts: 2400 Voltage: 120VAC Amps AC: 20 Temp. Rise @ 0.5 GPM: 33 Degrees F Temp. Rise @ 1.5 GPM: 12 Degrees F Min. Flow Activation: 0.40 gpm Temp. Range: 90 Degrees to 120 Degrees F
- Water Connection: 3/8" Compression Height: 6-1/4" Standards: UL, IAMPO, HUD, ADA Depth: 2-3/4" Pressure Range: 25 to 150 psi Water Heater Design: Point-of-Use Mounting: Horizontal Temp. Rise @ 20.0 GPM: 20A Wire Size: 12 AWG Residential / Commercial: Commercial/Residential Width: 9-5/8" Water Heater Application: Undersink Phase: 1 Country of Origin (subject to change): United States
Bestseller No. 15 
Ariston Andris 4 Gallon 120-Volt Corded Point of Use Mini-Tank Electric Water Heater
- Compact design; wall or floor mounted (wall bracket included)
- Provide immediate hot water at the point of use; install as booster or standalone
- Easy installation; installs right at the point of use with water connection and standard 110/120 Volt outlet
- 6-year limited warranty on tank, 2-year warranty on parts
- TitanShield exclusive technology that fully protects inner surface against corrosion; robust environmentally safe insulation increases energy efficiency
Last update on 2023-02-09 / Affiliate links / Images from Amazon Product Advertising API