Top 10 Best 120 Volt Electric Tankless Water Heater Reviews & Comparison [Updated]

We all know that the best 120 volt electric tankless water heater is one of many out there. That’s why we’ve taken 66362 reviews from top experts and organized them according to our rankings for you. 

We know how hard it is to find a great 120 volt electric tankless water heater, which is why our team went through the whole research process and put up this list for you. These are just some of their favorites!

We have been exhaustive in our search for the perfect 120 volt electric tankless water heater of 2026. If quality matters most, then check this list: 

Bestseller No. 1

Tankless Water Heater Electric for Single Sink Faucet, ThermoMate 3500W 120V Small Point of Use Instant Hot Water Heater with Temperature Display, Self-modulating, ETL Certified

• [Instant Sink Hot Water] - 3500W power heating system provides on demand hot water in seconds for point-of-use applications, perfect for under / over sink faucet. Temperature setting range from 86°F - 131°F. 24 Hours standby. 0.4GPM-0.66GPM
• [Self-modulating Power] - Regulating the amount of energy required to heat water only when you need it with 99.8% efficient. 120V must Hardwired
• [Long-lasting Quality] - Cast aluminum heating element separated from water line, significantly reducing scale, corrosion and mineral buildup. SUS 304 stainless steel water tube
• Sleek Compact Size - 7.9" x 6.4" x 2.5", Small water heater fit in tight places within your home or business, like under cabinets and sinks, hair salons, bar counters and hotel receptions, saving valuable storage space
• Touch control panel and digital temperature display allowing adjustment in 1° increment. IP25 waterproof, Standard 1/2"NPT pipe fitting, pre-wired pigtail for easy installation

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Bestseller No. 2

Tankless Water Heater Electric 110V, 3000W Instant Electric Water Heater, Under Sink Water Heater with Digital Display, On Demand Hot Water heater Electric for Kitchen Bathroom Washin

• ✔ ELECTRIC TANKLESS WATER HEATER - This tankless electric water heater is made of high-quality ABS material, with LED display. With 3000W power, the mini water heater can raise the water by 82° F(0.3GPM) -131° F(0.5GPM) in seconds, providing tankless instant, continuous hot water without waiting for preheating, meeting daily hot water needs. The on demand water heater can set Fahrenheit or Celsius degrees by holding a power button for 6 seconds.
• ✔ COMPACT AND EFFICIENT DESIGN - The electric water heater tankless adopts an ultra-thin and smooth appearance design, which is beautiful and elegant. The point of use water heater can meet your outlet temperature requirement. The Larger the water flow, the lower the outlet temperature; The smaller the water flow, the higher the outlet temperature. Not Suitable for Shower(Shower normally requires at least 1.8 GPM). Under sink water heater 110v plug in.
• ✔ SAFETY INTELLIGENCE RELIABLE - This under sink hot water heater has multiple protection functions. Water and electricity isolation, IPX4 waterproof, leakage protection, dry boil protection, and automatic power off under overheating and inactivity. Prevent leakage and water pipe corrosion. The thermal efficiency of instant hot water heater is as high as 98%, allowing you to enjoy hot water at any time and save energy.
• ✔ EASY TO INSTALL AND APPLICATION - Our instant hot water heater under sink compact design, it is very suitable for every corner of your home. This 110 volt water heater comes with premade fixing screw holes, an English manual, and 1/2 inch NPT standard interface. This small water heater is ideal for spaces such as kitchens, apartments, bathrooms, RVs, and camping. TIP: Install vertically to avoid malfunction of the heating elements (E2).
• ✔ IMPORTANCE FOR INSTALLATION - ① The 110v water heater is vertical installation only, no horizontal installation is allowed, to avoid malfunction of the heating elements (E2). ② The electric tankless water heaters tighten the pipe connectors with Teflon tape to prevent a short circuit (E2). ③ This tankless hot water heater is recommended to be connected with wires with a cross-sectional area of ≥ 2.5 square millimeters, and connected to trip switches of over 32a for use.

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SaleBestseller No. 3

Mini Tankless Water Heater Electric 110V ~ 120V for Sink, ThermoMate 4.5kW 37.5A at 120V Small Point of Use Water Heater CSA Approved, Must HardWird Requiring 10AWG Wire

• On Demand Heating - 4.5kw tiny compact water heater provides on demand hot water for Single faucet, 115°F 0.66GPM
• Specifications - 4.5kW 120V ONLY Hardwired using 10AWG above wire size, requiring 40A Double Pole Circuit Breaker, and 1/2"NPT water connections
• Long-lasting Quality - Cast aluminum heating element separated from water line, significantly reducing scale, corrosion and mineral buildup. SUS 304 stainless steel water tube
• Sleek Compact Size - 10.95" x 7.4" x 2.52", Small water heater fit in tight places within your home or business, like under cabinets and sinks
• Touch control panel and digital temperature display allowing adjustment in 1° increment. IP25 waterproof, Standard 1/2"NPT pipe fitting, pre-wired pigtail for easy installation

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Bestseller No. 4

Rheem 3.5kW 120V Point of Use Thermostatic Tankless Electric Water Heater

• ELECTRICAL REQUIREMENTS: 1 x 30 AMP Double Pole Breaker Required. Product installation hard wired to 120 volts requiring a 30-amp breaker.
• SAVES SPACE: Ideal for low flow point-of-use applications, such as in a bathroom, office breakroom, wet bar, or garage. The compact size of the water heater is up to 98% smaller than a standard electric water heater.
• EASILY ADJUSTABLE: Thermostatic temperature controls in 1-degree increments ranging from 80 to 140 degrees Fahrenheit for on-demand, consistent hot water.
• INSTALLATION: Designed to be mounted in an upright position with the inlet and outlet water connections at the bottom of the unit for ease of installation with no venting required.

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Bestseller No. 5

ECOTINYMACH Tankless Water Heater Electric 110V, 5000W Instant Water Heater Under Sink, Conversion Between Fahrenheit and Celsius, Remote Control

• Easy Operation: The ECOTINYMACH 110V tankless water heater electric is designed for user-friendly and effortless operation, making your life easier and more comfortable.
• Instant Hot Water: Say goodbye to the waiting time for hot water. With this tankless water heater, you can enjoy hot water anytime, anywhere at your home.
• Fahrenheit and Celsius Conversion: Featuring seamless conversion between Fahrenheit and Celsius, this water heater lets you choose the unit of measure that you're comfortable with.
• Energy Saving: The ECOTINYMACH 110V electric tankless water heater only operates when hot water is needed, reducing energy consumption and saving on your electricity bill.
• Installation instructions: Wire requires 6mm ² (9AWG), circuit breaker ≥ 60AMP, thread size: 1/2 "NPT, please contact a person with an electrical license to help you complete the wire connection.

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Bestseller No. 6

CAMPLUX Tankless Water Heater Electric 3.5kW 120V Instant Hot Water Heater ETL Certified with Self-modulating, Save Energy, Point of Use for Kitchen, Bathroom, White

• 【Instant Hot Water Heater in 3s】Tankless water heater does not wait for preheating. The temperature rise of 1.0 GPM is 22°F. Easy to get hot water at 73℉ or higher (Only for one sink)
• 【Saves Energy】Electric tankless water heater adopts a self-modulating design and adjusts power input based on flow rate and temp setting in real-time. Saving up to 98% in energy consumption
• 【Save Space】With a mini size of 7.8W×6.3H×3.9D inch, mounted multi-angled in small spaces throughout the kitchens, wet bars, schools, hospitals, hair salons, and boats
• 【ETL Listed Safety Guarantee】NFS-approved, offers lead-free water. ETL safety certified, leakage and overheat protection device to ensure your safety. Inner water and electricity lines are designed to run separately to avoid leakage or harm from scale build-up
• 【Convenient Use】 Touch control panel and digital temperature display, easy to set your desired temp. The minimum water flow for activation just needs 0.4GPM-0.66GPM (Only for one sink). MUST Hardwired, NO PLUG. Drawing only 110-120 Volts

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Bestseller No. 7

LECLOC Mini Tankless Under Sink Instant Hot Water Heater Electric 3kW 120V Plug in, Enlarged LED Digital Display, Knob Control, Multiprotective, IPX4, 30-55℃ Point of Use On Demand Water Heater, White

• Note: This model (3kW 120V) mini tankless water heater is designed for low-flow use only, not suitable for showers or multiple taps at once. The output water temperature is affected by many factors, including the water heater wattage (heating capacity), inlet water temperature and water flow. For a better warm water use experience, we recommend that you consider the higher wattage model (6kW 240V) first, which is hard-wired. 240 volts power supply and a 30 amps double-pole circuit breaker are required. Consult an electrician before you order. Thanks
• Easy to Use: Stylish enlarged LED digital display with knob control, this 3kW 120V point of use water heater is very easy to use. 1 knob for power ON/OFF and temperature adjustment, offering a better user experience than others 3 mini touchscreen buttons. You can adjust the temperature between 30℃ and 55℃
• Multi-protective and Smart: Every Lecloc water heater undergoes strict tests to ensure the safety of use. This instant hot water heater is designed with multiple protections, including leakage protection, overheat protection, dry combustion protection, high water pressure protection, IPX4 waterproof and is drop-test passed. Also this small electric water heater has functions of automatic fault diagnosis and constant temperature memory, very safe and intelligent to use
• Efficient: The 3kW 120V under sink hot water heater is suitable for 1 point of use. It can provide 24-hour endless instant hot water without the need for preheating, saving much compared to tank water heaters
• Widely Applicable: Whether you need hot water for sinks in kitchen, bathroom, laundry, basement, offices, shop, apartment, dormitory, garage, bar, or hair salon, this on demand small water heater has you covered. The compact design under sink tankless water heater can be installed anywhere

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SaleBestseller No. 8

LECLOC Mini Tankless Under Sink Instant Hot Water Heater Electric 3kW 120V Plug-in, Enlarged LED Digital Display, Knob Control, IPX4, Multiprotective, 30-55℃ Thermostatic On Demand Water Heater, Gray

• Note: This model (3kW 120V) mini tankless water heater is designed for low-flow use only, not suitable for showers or multiple taps at once. The output water temperature is affected by many factors, including the water heater wattage (heating capacity), inlet water temperature and water flow. For a better warm water use experience, we recommend that you consider our higher wattage model E65 (6.5kW 240V) first, which is hard-wired, 240 volts power supply and a 30 amps double-pole circuit breaker are required. Consult an electrician before you order. Thanks
• Easy to Use: Enlarged LED digital display with knob control, this 3kW 120V point of use water heater is very easy to use. 1 knob for power ON/OFF and temperature adjustment, offering a better user experience than others 3 mini touchscreen buttons. You can adjust the temperature between 30℃ and 55℃
• Multi-protective and Intelligent: Every Lecloc water heater undergoes strict tests to ensure the safety of use. This instant hot water heater is designed with multiple protections, including leakage protection, overheat protection, dry combustion protection, high water pressure protection, IPX4 waterproof and is drop-test passed. Also this small electric water heater has functions of automatic fault diagnosis and constant temperature memory, very safe and smart to use
• Efficient: The 3kW 120V on demand water heater under sink is suitable for 1 point of use. It can provide 24-hour endless warm water without the need for preheating, saving much compared to tank water heaters
• Widely Applicable: Whether you need hot water for sinks in kitchen, bathroom, laundry, basement, offices, shop, apartment, dormitory, garage, bar, or hair salon, this small point of use water heater has you covered. The stylish compact design tankless water heater can be installed anywhere

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Bestseller No. 9

CAMPLUX Electric Tankless Water Heater 4.5kW 120V Undersink Instant Water Heater, Point-of-Use, Save Space for Sink Wall Mounted LED Digital Display CSA Certified

• 【Point of Use Hot Water】 4.5kW under sink water heater only heats the water when you need it and no waiting to preheat, saving up to 50% in energy consumption. The temperature rise of 1.0 GPM is 50°F. Easy to get hot water in 3 seconds
• 【Save Space】 With a mini size of 10.95W×2.52H×7.4D inch, mounted multi-angled in small spaces throughout the kitchens, wet bars, schools, hospitals, hair salons, and boats
• 【Save Energy】 Electric tankless water heater adopts a self-modulating design and adjusts power input based on flow rate and temp setting in real-time. Saving up to 99.8% in energy consumption
• 【CSA Listed Safety Guarantee】 Safety features include overheating protection, dry heating protection, and electrical leakage protection. Inner water and electricity lines are designed to run separately to avoid leakage or harm from scale build-up
• 【Convenient Use】 Touch control panel and LED digital temperature display, easy to set your desired temp. The minimum water flow for activation just needs 0.26 GPM (Only for one sink). MUST HARD WIRED, NO PLUG. Drawing only 110-120 Volts

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Bestseller No. 10

Ranein 4.5 kW 110v Electric Tankless Water Heater Ultra - Instant On-Demand Under-Sink Point-of-Use Heater for Bars, Hair Salons, Touch, CSA Certified with LED Digital Display

• NOTE—Make sure this undersink water heater is sized to fit your hot water needs: 4.5 kW; circuit breaker required: 1 x single pole breaker 40 amps, 110-120 V AC, no plugs. Electric water heater dimension: 9.06" x 2.34" x 6.7"; water connection: 1/2" NPT.
• UNDER SINK INSTANT WATER HEATER—This Uses a 4.5KW heating system 24/7, so instant hot/warm water is continuously supplied to your entire home at a preset temperature when needed. No standby energy consumption. No need to wait for the tank to fill.
• ADVANCED SAFETY PROTECTION SYSTEM— With CSA certification, it is safe as per Canadian and US Standards. Features over-heating protection, low water flow protection, dry combustion protection, anti-freezing protection, high water pressure protection, and flame failure device.IPX4 waterproof. Stainless steel heating element, no water storage, prevents sediment/scale accumulation.
• VISUAL CONTROL FUNCTION—The tankless water heater is equipped with a digital display and a touch control panel, so setting the temperature is easy. The intelligent display temperature is convenient for setting the appropriate temperature for different seasons and for using hot water.
• SMALL AND CONVENIENT—Compared to tank water heaters, the mini tankless water heater is compact and does not take up space. It can be installed anywhere near the water outlet to avoid space waste and hygiene problems. Tankless water heaters support three installation methods: horizontal, vertical, and inclined installation. They are suitable for under sinks, kitchens, bars, hair salons, and communities.

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How Do We Test 120 Volt Electric Tankless Water Heater 

If you’re looking for an unbiased opinion on any product, we’ve got your back. Our reviews are rigorous and thorough – taking all factors into account, including design, features, price-to something else that matters most in making an informed decision before purchasing one of these items!

Factors to Consider Before Purchasing 120 Volt Electric Tankless Water Heater

What’s the point of a buying guide if you don’t know what factors to consider before purchasing 120 volt electric tankless water heater?

• Satisfy your need
• Features & Specifications
• Quality & Durability
• Brand Value
• Customer Reviews & Ratings
• Price
• Customer Service

You may be wondering why you need to consider some factors about a 120 volt electric tankless water heater before purchasing. It’s because there are so many things that can go into making your decision, and knowing all of them upfront will help keep any surprises later on in life!

What’s The Best Place To Purchase 120 Volt Electric Tankless Water Heater

Online shopping is the way of 2026, and if you want to make sure that your purchase will be an excellent one, then there’s no better place than online. You’ll have access to so many more products in different shapes, sizes, colors, and flavors brands with unbeatable prices.

There are so many different options when it comes to choosing a new 120 volt electric tankless water heater, and we truly believe that you should do your research before making such an important purchase. The questions might include:

• Should I buy a new, used, or refurbished 120 volt electric tankless water heater?
• Do you really need the high quality 120 volt electric tankless water heater there is?
• What are must-have features for 120 volt electric tankless water heater?
• Best time to buy a 120 volt electric tankless water heater?
• What are the benefits of buying 120 volt electric tankless water heater?
• Why is it critical to invest in a good in today’s market, particularly the best one?

In our opinion, investing in a good, high-quality 120 volt electric tankless water heater will make you feel confident about your purchase. You can tell that the company put effort into making sure it was top-notch and took their time with designing everything from packaging to graphics for marketing purposes because this makes them seem more reliable than competitors who don’t invest so much money on these things (especially if they’re cheap). Plus, having quality materials ensures longevity which is always nice. 

Tips For Being A Smart Online Shopper

When shopping for a product online, be sure to read the reviews before making a purchase. This can give you a good idea of what to expect from the product and can help you decide if it’s the right fit for your needs. Additionally, be sure to check the return policy and shipping times before buying anything. This way, if you’re not happy with the product, you can easily return it without any hassle. And if you need the product quickly, you’ll know that it will arrive in a timely manner.

When looking for a 120 volt electric tankless water heater, be sure to compare prices from different retailers. This way, you can be sure you’re getting the best deal possible. Additionally, be sure to read the fine print before making any purchase, as some retailers may have hidden fees or charges. By taking the time to do your research, you can be sure you’re getting the best possible deal on the product you want.

These are just a few things to keep in mind when shopping for a product. By taking the time to consider your needs and doing your research, you can be sure you’re getting the best possible product for your needs. And if you have any questions, be sure to contact customer service or the retailer before making your purchase.

FAQs About Best 120 Volt Electric Tankless Water Heater

What is More Important: a Good Product or a Good After-sales Service?

When it comes to choosing a 120 volt electric tankless water heater, many people prioritize the quality of the product itself. However, after-sales service can be just as important, especially if something goes wrong with the product. So when it comes to choosing a product, it’s important to weigh both factors and decide which is more important to you. If quality is your main concern, be sure to choose a product that comes from a reputable brand and has good reviews. However, if you’re more concerned with after-sales service, be sure to choose a product from a company that offers excellent customer service. 

How to Save Money When Buying Online? 

When shopping for a 120 volt electric tankless water heater online, there are a few things you can do to save money. First, be sure to compare prices from different retailers before making a purchase. This way, you can be sure you’re getting the best deal possible. Additionally, be sure to read the fine print before making any purchase, as some retailers may have hidden fees or charges. By taking the time to do your research, you can be sure you’re getting the best possible deal on the product you want. Additionally, you can also sign up for Amazon Prime, which gives you access to exclusive deals and free shipping on many items. So if you’re looking for the best possible deal on Amazon.

Bottom Line

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We’re here for you. We’ll help answer any questions or concerns about the 120 volt electric tankless water heater as long as they don’t involve technical details like how it works in a general sense! If there’s anything else on your mind, please let us know because someone will be happy to assist immediately-we want this process easy and breezy.

As a prospective buyer, it’s important that you research the product thoroughly before purchasing. There are many online forums where people can share their knowledge and experiences with different products in order to help guide your decision on what is best for yourself.

With our guide, you can find the best 120 volt electric tankless water heater available on the e-commerce market. We make use of Big Data and AI data to compile this list, so it is highly accurate.

The process of creating this content was challenging, but our team persevered through it to bring you the best possible results. We read user reviews and looked at what buyers think about each product so that your buying experience will be satisfying.