Top 10 Best Electric Tankless Water Heater 120V Reviews & Comparison

We all know that the best electric tankless water heater 120v is one of many out there. That’s why we’ve taken 68715 reviews from top experts and organized them according to our rankings for you. 

We know how hard it is to find a great electric tankless water heater 120v, 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 electric tankless water heater 120v of 2025. If quality matters most, then check this list: 

Bestseller No. 1

ECOTINYMACH 110V Tankless Water Heater Electric, 3000W Compact Water Heater Under Sink, Conveniently Convertible Between Fahrenheit and Celsius

• Compact Design: ECOTINYMACH's tankless water heater is designed with a compact footprint, offering an efficient solution for heating water without consuming unnecessary space.
• Convertible Temperature Scale: Unique feature of our heater allows you to switch between Fahrenheit and Celsius temperature scales conveniently, enabling you to monitor the water temperature in a scale that suits you best.
• Easy Installation: Designed with simplicity in mind, our tankless water heater can be installed quickly and easily, saving you time and effort.
• Electric and Energy Efficient: Being electric and tankless, this water heater from ECOTINYMACH is not only efficient but also environmentally friendly, helping you save on your energy bills and reduce your carbon footprint.
• Installation instructions: Circuit breaker ≥ 32AMP, thread size: 1/2 "NPT, wire requires 2.5mm ² (13AWG),

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Bestseller No. 2

Rheem 11kW 240V Tankless Electric Water Heater

• ON/OFF Dial Control with adjustable digital temperature display
• Self-modulating power control
• 11kW Model Flow Rate: up to 2.68 GPM
• Side 1/2" NPT water connections
• On demand, consistent and continuous hot water

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SaleBestseller No. 3

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

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SaleBestseller No. 4

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. 5

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. 6

LECLOC Under Sink Tankless Water Heater Electric 3.5kW 120V, Enlarged LED Digital Display with Knob Control, Overheat Protection, IPX4, 30-55℃ On Demand Small Water Heater for Bathroom or Kitchen Sink

• Easy to Use: Stylish enlarged LED digital display with knob control, this 3.5kW 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 3.5kW 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
• Note: This model (3.5kW 120V) mini tankless water heater is designed for low-flow use only, not suitable for showers or multiple taps at once. 120 volts power supply and a 30-40 amps single-pole circuit breaker are required for installation. 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

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SaleBestseller No. 7

Rheem 18kW 240V Tankless Electric Water Heater, Gray

• External digital thermostatic control with LED display (+/1 degree accuracy)
• Most advanced self-modulation, adjust power to meet hot water demand
• Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM
• Simple installation – bottom 3/4 inch NPT water connections
• Threaded for easy replacement, simple installation, digital temperature display

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Bestseller No. 8

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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SaleBestseller No. 9

CAMPLUX Electric Hot Water Heater 6 Gallons, 120-Volt Corded 1440W Point of Use Mini-Tank Electric Water Heater, Wall or Floor Mounted, UL Listed ME60

• Saving Energy & Money - Built-in insulation foam reduces heat loss. A 6-gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it
• High Quality Built & Elegant Design - CAMPLUX electric water heater has a glass-lined tank for long service life and is easy to maintain. The elegant streamlined design cover makes your kitchen pretty
• UL Approval Safety - Thermostat Control allows adjustment of water temperature. With 3 temperature level settings, range from 50°F to 149°F. High Limit devices provide protection while overheating
• Friendly Use - With a mini tank compact design, can be wall or floor mounted under sink / counter, 120 volt outlet for independent installation or in-line with a large hot water source.(Max. water pressure is 150 PSI, CSA listed Temperature & Pressure relief valve included)
• Easy Installations - 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. 120V AC plug in and 3/4" NPT water connections. Maximum water pressure: 150 PSI. Product dimension:15.75" W x 18" H x 15.5" D

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Bestseller No. 10

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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How Do We Test Electric Tankless Water Heater 120V 

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 Electric Tankless Water Heater 120V

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

• 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 electric tankless water heater 120v 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 Electric Tankless Water Heater 120V

Online shopping is the way of 2025, 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 electric tankless water heater 120v, 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 electric tankless water heater 120v?
• Do you really need the high quality electric tankless water heater 120v there is?
• What are must-have features for electric tankless water heater 120v?
• Best time to buy a electric tankless water heater 120v?
• What are the benefits of buying electric tankless water heater 120v?
• 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 electric tankless water heater 120v 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 electric tankless water heater 120v, 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 Electric Tankless Water Heater 120V

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

When it comes to choosing a electric tankless water heater 120v, 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 electric tankless water heater 120v 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 electric tankless water heater 120v 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 electric tankless water heater 120v 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.