Best 120v Tankless Water Heater Reviews 2021

Explore without worrying.

In our quest to find a small water heater that has no water. We have been looking for space-consuming heaters to small holding tanks. Best 120v tankless water heater 2021 is easy to install to high-powered.

In a Rush? Here is Our Top Choice

Best Overall

Avg. Customer Review

92%
Stiebel Eltron DHC

Rinnai V65IN

Indoor Tankless Hot Water Heater


About this item

  • 6.56 GPM
  • 0.82 Energy Factor Rating
  • Gas, Indoor

Best On Budget

Avg. Customer Review

76%
Ecosmart POU

Eccosmart POU

Electric Tankless Water Heater


About this item

  • 8.8 Max GPM
  • 96% Efficiency Rating
  • Electric
  • 120-Volt

Premium Choice

Avg. Customer Review

92%
Rinnai RL75IN

Rinnai RL75IN

Mini Single Handwashing Sink Heater


About this item

  • 7.5 GPM
  • 99% Efficiency Rating
  • Gas, Indoor

A tankless water heater is an essential gear for a home bath or shower. And the standard voltage-based models required best 120v tankless water heater 2021 to find a place to use and 240 water heaters used for bathing.
Low power supports a range of low water, which is why in this review of waterless 120v. Most of which is a point of use or less available. In addition to introducing hot water 120-volt hot water hottest in the 2020 market, there are also guiding experts that you will never miss.

LIST OF BEST 120v TANKLESS WATER HEATERS 2021

Images

Products

Price/ Rating

Best Overall

Rinnai V65IN

Rinnai V65IN

6.56 GPM 0.82 Energy Factor Rating Gas, Indoor

Avg. Customer Review

92%

Premium Choice

Rinnai RL75IN

Rinnai RL75IN

7.5 GPM 99% Efficiency Rating Gas, Indoor

Avg. Customer Review

92%

Best On Budget

Ecosmart POU35

Ecosmart POU35

8.8 Max GPM 96% Efficiency Rating Electric

Avg. Customer Review

76%

Top Rated

Takagi T-H3-DV-N

Takagi T-H3-DV-N

Max GPM 10 0.93 Energy Factor Rating Natural Gas, Indoor or Outdoor

Avg. Customer Review

86%
Stieble Eltron DHC 3-1

Stieble Eltron DHC 3-1

4.4 Pounds, 96% Efficiency Rating, Electric

Avg. Customer Review

78%
Stiebel Eltron

Stiebel Eltron

Major energy savings

Avg. Customer Review

78%
Eccotemp FVI-12NG

Eccotemp FVI-12NG

3.5GPM, 96% Efficiency Rating, Natural Gas

Avg. Customer Review

72%
Camplux Propane

Camplux  Propane

3.18 GPM, 0.82 Energy Factor Rating, Gas, Outdoor

Avg. Customer Review

84%

Best Powerful

Stieble Eltron DHC 3-1

1: Stiebel Eltron 200067 DHX Tankless Water Heater (Best Powerful)

4.4 Pounds, 96% Efficiency Rating, Electric

About this item

  • The Stiebel Eltron DHX 3.5-1 electronic point-of-use tankless water heater is a high performance unit designed for use in residential and light commercial applications.
  • The DHX 3.5-1 features an integrated anti-scalding system that can be adjusted to provide protection from temperatures between 109 and 131 F, with the ability to set different limits at each outlet.
  • The integrated flow sensor prevents water wastage by automatically shutting off when no flow is detected.

Avg. Customer Review

78%

The smaller Stebel Eltron is manufactured in Germany. They are designed to put hot water where you need it to be used quickly, smoothly, and save water. It is also a European, attractive design that includes any decorations to be revealed to look or be hidden under the kitchen.

Features 

 Modern and sleek design

Steibel has set the new model of the best 120v tankless water heater 2021, which is excellent, lightweight. Just as, this model is sturdy in its shape and sleek design. Similarly, this model is designed for under sink hard wiring, horizontal installation.

Less power consumption

Using a Steibel Eltron point of use water heaters is a great way to save nearly 50% of the energy other electric water heaters use. The only time the heater turns on is when it detects you have opened a hot water tap and it has water running through it. So you can cut down your electricity bill.

Solid water temperature

A steady and strong supply of hot water without sacrificing any pressure is what I love about the Steibel. You won’t need to worry that your shower will give you an unexpected cold surprise halfway through.

The best part though thanks to its German-engineered design and construction – it’ll last many years without any maintenance needed at all.

Pros
  • Easy to install
  • Low price
  • Working great
Cons
  • A bit heavy

Best On Budget

Stieble Eltron DHC 3-1

2: EcoSmart POU 3.5 Electric Tankless Water Heater (Heavy Duty Overall)

8.8 Max GPM 96% Efficiency Rating Electric

About this item

  • The Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater is a great option for residential and commercial applications.
  • This tankless water heater can provide hot water for one sink at 0.5 GPM in warmer climates, and requires 1 x 30 amp breaker and 10 AWG wire.
  • The 3.5 kW heater is designed to produce hot water at a rate of 2 gallons per minute (GPM) from a 20 gallon storage tank with an input temperature of 90°F (32°C)

Avg. Customer Review

76%

EcoSmart POU 3.5 is the perfect choice for 120v tankless water heater 2021 because of its compact size and 24-hour delivery time which makes it extremely convenient if you are in a hurry to get a new water heater installed.

It’s also a great option if you need hot water in just one location, as this unit can supply enough heat without taking up any extra floor space that would otherwise be used by storage tanks!

The EcoSmart features quality components such as an insulated stainless steel exterior with copper heat exchanger coils, a high-temperature limit safety switch. But what sets it apart from the competition is its compact size and no need for venting the instructions are very clear, making installation easy as pie!

Features 

Adjustable water temperature 

Consequently, the temperature is adjustable in the use of water. The power is turned off automatically when the temperature is reached. As well, directly heat the system with high efficiency and low heat tube capacity, which you can use very thermal energy.

Less use of electricity

Additionally, a point of use electric heater works without using lots of electricity. Without radiation, outside pollution, gas generating. The lightweight heater is the perfect combination of indoor quality and a stylish look. Hence, this heater works for many different family needs. It is healthy for your family.

Pressure of water

This unit is designed to supply hot water to one location in the house, it is not going to be a large enough unit for an entire home. Where it is especially suited is for those families which are located in high-rise flats with low water pressure, or for RV’s. In the same way, water temperature is equal to fluctuations in flow rate. It is ideal for showering, hand and face washing, but it is not powerful enough if you live where you get cold weather.

Easy to Use

They designed the Ecosmart POU 3.5 so that Once installed, you don’t need to do anything but turn on your tap and let it work its magic for you!

Pros
  • Space-saving design
  • Endless hot water
  • Aesthetic design
  • Easy to adjust the temperature
  • Multiple installation methods
Cons
  • Bit expensive

Stiebel Eltron

3: Stiebel Eltron Tankless Heater (Best Efficient)

Major energy savings

About this item

  • The Stiebel Eltron 220816 3.0 kW, 120V Mini 3-1 Mini Single Handwashing Sink Tankless Water Heater is a must have for any kitchen.
  • It has an extremely compact design and saves space while providing unlimited supply of hot water.
  • The sleek design and can be mounted in plain sight, unlike other bulky tankless water heaters out there.

Avg. Customer Review

78%

The Stiebel Eltron Tankless Water heater features a special patented German Advanced Flow Control technology developed by Stiebel Eltron to automatically maintain water temperatures for maximum comfort. Additionally, it will reduce the flow of small quantities if the need for hot water exceeds the capacity to ensure that hot showers will not be disturbed.

Stiebel Eltron Features 

Energy-saving Heater

This model will generally use 15-20% less energy compared to conventional water tank heaters. However, it is possible to save a lot of energy depending on home use methods. The difference is that conventional water heaters often store hot water, and as a result, lose 15% -20% of the total energy consumed by heat loss to the environment. This is called pending heat loss.

High power

In spite of this, the total power of this product is 1500w and has many input modes. It can also be applied to different water pressures in different locations. Making it especially good for those families which are located in high-rise flats with low or varied water pressure.

Sleek Design

Similarly, its sleek, minimalist design saves space yet providing endless hot water for your entire home, and no access is needed. The Eco-friendly unit saves energy through auto-modulation and the ability to measure electricity flow.

Cutting back on energy use during the winter can be tough, especially when you’re already trying to stay warm. And did you know that a water heater can be one of the most expensive energy costs in your home. So. installing a new more efficient electric water heater is one way of saving money over time by taking into account its power usage – even though it’s expensive up front.

On-demand Hot Water Provides

Tons of gas-electric or oil water heaters are very inefficient, as they are constantly keeping a supply of water hot, even when it is not needed. This Steibel model does not hold hot water; it will just provide hot water when you use it. Working on demand to provide continuous and sustainable hot water when you need it and not waste energy when you don’t.

Pros
  • Worth every penny
  • Sleek design
  • Mounting installers
  • Best for large homes
Cons
  • Use more electricity

Best Overall

Stiebel Eltron

4: Rinnai V65IN Efficient 120v Gas Tankless Heater

6.56 GPM 0.82 Energy Factor Rating Gas, Indoor

About this item

  • Rinnai’s V65iN gas-fired tankless water heater is designed to provide you with hot water on demand.
  • The unit features a high-performance 6.3 GPM flow rate for a powerful, constant stream of hot water and an energy efficient design that conserves energy as it heats only when necessary.
  • This space-saving model is guaranteed to last 10 years and comes with a 5-, 1-, and 90-day money back guarantee, respectively.

Avg. Customer Review

92%

The Rinnai V65IN is a good option for a 120v heater, it’s not a true 120v water heater as uses gas to heat the water, and electricity only powers control panels. However, this does make it very efficient and saves energy on your electric bill if you have an available natural gas connection in the house or building!

Rinnai V65IN Features 

Energy Saving

Rinnai V65IN tankless water heaters are the best choice for those who want to make their homes environmentally friendly. With an Energy Factor of .82 they use very little energy to produce hot water, saving you on gas consumption, making them a wise economical purchase.

Indoor Installation

These tankless hot water units are designed to be installed indoors, where they’re not exposed to extreme weather conditions or wind. The downside is that you’ll need a venting system through the use of a flu because these types of systems produce exhaust fumes when heating your home’s tap water.

Impressive Quality

The Rinnai V65IN tankless water heater is no exception to the quality and durability that all Rinnai products are known for. This installation process will be quick and easy, keep in mind though this product should be installed by a professional to ensure it’s done so safely.

The V65IN 120v tankless water heater is backed up by an impressive warranty that can’t be beat. No matter what, you’ll have peace of mind knowing the heat exchanger will last for 10 years and parts are covered for 5 along with labor included in your 1 year limited warranty.

High Flow, and Temperature Control

One of the great features about the V65IN is unlike some other 120 volt tankless heaters this one can handle high volumes of water with no struggles at all.

You have good control over the temperature too if you’ve got a compatible Rinnai controller that makes it possible to adjust the output water’s heat from 98°F – 140°F. Otherwise, this unit is Pre-set at 120 degrees Fahrenheit but it can be adjusted up to a constant 140 degrees F for those who prefer their water hotter than usual!

Commercial and Residential Use

Meanwhile, Rinnai has earned a reputation as one of the most trusted names in the industry This unit is designed primarily for residential domestic use. However, it would be perfectly suited to a small office or workshop too. Making it on of the best 120V tankless water heaters available in 2021.

Pros
  • Built-in recirculation system
  • A digital controller system
  • Multiple venting options
  • Less draining water
Cons
  • Bit pricey

Best Compact Gas

Stiebel Eltron

5: Eccotemp Tankless Water Heater (Best Compact Gas)

3.5GPM, 96% Efficiency Rating, Natural Gas

About this item

  • Eccotemp’s fvi12-NG is a whole home indoor, gas powered tankless water heater that heats water only when in use. It is rated at 3.6 GPM and it activates only when hot water is needed.
  • This unit has a compact and space-saving design with minimal noise output and an easy to read digital temperature display on the front.
  • The fvi12-NG plugs into standard 120v electrical outlet with UL listed cord and uses standard 1/2″ NPT water fittings.

Avg. Customer Review

72%

The Eccotemp fvi12-NG FVI-12 is an inexpensive gas tankless water heater that uses tried and tested technology to provide high quality, reliable hot water. With manual controls for both the flow of gas as well as the temperature at which you want your warm tap water to be, it has all of the features one would expect from such an appliance.

The Eccotemp FVI-12 is perfect for apartments, cabins or smaller homes because it’s powerful but still compact.

Features 

Digital Temperature Display

As well, it has an easy to read the digital temperature indicator, in a compact design, saving space and has minimal noise output. In fact, Eccotemp is designed for an indoor installation with safe ventilation, efficient and convenient for any small home, apartment.

Electronic Ignition System

Who doesn’t want to save energy and money? Eccotemp water heaters are a great option for anyone looking to do so. When you turn on the hot water tap, it instantly ignites your gas flame using an electronic sensor that senses when there is running or flowing water. This saves power because tankless units only produce as much heated volume of warm liquid at any given time as opposed to continually heating the same amount of standing fluid in tanks.

Pros
  • Fantastic in freezing weather
  • Amazing and great performance
  • Manual temperature control
  • Horizontal vent kit
Cons
  • Perfect for only one house

Best High FLow

Takagi Tankless

6: Takagi Tankless Water Heater (Best High FLow)

Max GPM 10 0.93 Energy Factor Rating Natural Gas, Indoor or Outdoor

About this item

  • The Takagi T-H3-DV-N Condensing Gas Water Heater is the perfect choice for both residential and light commercial applications.
  • The T-H3-DV-N offers a compact design that easily fits into tight spaces, providing you with endless hot water on demand.
  • This unit is also Energy Star qualified, so you can save money on your energy bill while conserving natural resources.
  • The safety features of this model include freeze protection, overheat protection, surge protection and diagnostic codes to help troubleshoot any problems that may arise.

Avg. Customer Review

86%

With a flow rate of 10 GPM the T-H3-DV-N is the best 120v hot water heater on the market for larger households. Takagi has a reputation of making top quality products, and this product does not disappoint!

Features 

Endless Hot Water

With the Tagaki, you can be filling the tub, using a shower and doing laundry all at once without ever worrying about running out of hot water. The Takagi tankless heater is so efficient that it will never leave you shivering in your cold bath or waiting for minutes on end while someone decides to do their washing.

Overall Performance 

Thanks to the use of a commercial-grade copper alloy primary heat exchanger, the transfer of thermal energy from burning gas flame to incoming water is up 25x more efficient than in other systems that use stainless steel.

THe manufacturers state that the T-H3-DV-N can supply hot water to 4 bathrooms in warmer climates, but in colder areas it may be only able to supply enough hot water for 3 bathrooms.

Commercial grade in a residential size

The Tagaki is a small commercial grade tankless water heater, designed specifically for use in restaurants and cafes. But because of its size and capacity it can also be incorporated into any household where there’s a constant need for hot water- You’ll find that they are perfect for recirculating systems too!

Easy to Install

The T-H3 is a highly efficient unit that not only heats your home, but also has considerably reduced gas fumes helping to improve air quality. The unit exceeds Ultra-Low NOx Emissions standards while maintaining its high efficiency rating with 199,000 BTU of heat power on demand. Unlike other units which require pilot lights in order to operate this one needs no constant pilot light.

It has a self-diagnosing system ensuring you’ll never forget anything when installing or operating the system; all you have to do is install by following the instruction guide included with purchase!

We do recommend getting a qualified plumber in to do the install though.

Pros
  • Challenging working heater
  • Home depot product
  • Temperature control
  • Easy to install
Cons
  • No extension

Best High FLow

Camplux Propane

6: Camplux Constant Propane Tankless Water Heater (Best High FLow)

3.18 GPM, 0.82 Energy Factor Rating, Gas, Outdoor

About this item

  • Tankless Water Heater Camplux Constant Propane Water Heater is a 3.18 GPM Instant Constant Hot Water heater that delivers 3.18 gallons per minute of on-demand endless hot water ensures constant comfortable instant hot water for 2-3 persons whole house. 3.18-GPM heater is activated by water flow rather than water pressure; Minimum activation water capacity rate: 0.65 GPM-4.8 GPM; Maximum input rating:

Avg. Customer Review

84%

Camplux Tankless Water Heater is a revolutionary 120v water heater that saves you 50% on your heating costs. The innovative design uses no gas and minimal electricity when not in use.

The compact design is ideal for small spaces where storage can be hard to come by, and it is very affordable yet feature-packed! making it one of the best 120v heaters you could buy in 2021.

Features 

Modern Design

The sleek, black tempered glass casing provides a modern finish for the unit and also has an LED digital display that shows you the output temperature reading. You can be sure your hot water is delivered at exactly what you desire- no more guessing if it’s too cold or scalding! It even comes with many inbuilt safety features to ensure peace of mind when using this product.

The Camplux has flame protection, and a wind-resistant ventilation system to prevent fumes from blowing back into the home ensuring your safety.

Save More Energy

The instant water heater is very easy to install. It comes with a stainless steel vent kit and a 110 volt power cord to power the electronics and exhaust fan. When not running the unit only needs 42 watts and when heating water it uses about 0.35 Amps. Making this one of the most energy-efficient tankless heaters on the market today.

Highly Efficient Product

This product is designed with highly efficient technology to reduce gas consumption and flammable noise. In this model, the technology is very energy efficient, over 85% of the energy used is converted into hot water, saving you a lot of energy and money.

Pros
  • Compact shape, wonderful for camping shower
  • Two buttons settings for water temperature adjustment
  • Endless hot water supply
  • Light-weighted
  • Unbeatable cheap price
Cons
  • Temperature control with gas and water flow

Premium Choice

Rinnai RL75IN

8: Rinnai Tankless Water Heater RL Series

7.5 GPM 99% Efficiency Rating Gas, Indoor

About this item

  • The Rinnai RL75IN is a high-efficiency tankless water heater with a compact design that fits in most spaces without sacrificing performance or comfort. It provides instant hot water flow to all the faucets and showers throughout your home with endless hot water for an enjoyable shower experience. The RL75IN has a recirculating system that works in conjunction with its circ-logic technology to provide you with consistent temperatures and stream rates.

Avg. Customer Review

92%

The Rinnai RL75iN is one of the largest and most powerful 120v indoor tankless water heaters. With enough power to supply hot water to 3 bathrooms at once, this unit will provide you with a 100% uninterrupted flow of piping-hot tap water all throughout your home.

Features 

Easy to Install

With a wide range of installation options, you’re sure to find the perfect one for your needs. The Rl water heaters come complete with a 6 ‘power cord so it’s ready to plug in right out of the box! You will also require a K-WV-200-1 valve kit to install this unit these are sold separately to the heater, so make sure you get one when you order your tankless heater. There is also to option with RL series Tankless Water Heaters to install an external pump that will allow for a recirculation system.

High Efficiency

This Rinnai model is a large indoor tankless gas heater with an advanced heat exchanger anda built-in controller. Furthermore, with flow rates of up to 7.5 GPM it also delivers the highest flow of water in its category.

Wi-Fi Monitoring

What makes the Rinnai RL stand out is that it’s a water heater that can be controlled via Wi-Fi, so you can monitor its performance in real-time.

Pros
  • Lowest cost heater
  • Stainless steel venting
  • Perfect in size
  • Manual, installation
Cons
  • Low level of water flow

Frequently Asked Questions( FAQs )

1: Are 120v tankless water heater running out of hot water?

Tankless water heaters are a great choice for homeowners who want to avoid the possibility of running out of hot water. They come in all sizes, and can be adjusted according to your needs- so finding one that is perfect for you should not be an issue! The size will depend on how much demand there is going through it at once, but if you’re careful about what appliances or showerheads you use then this won’t become an issue.

2: How long do 120v Water heaters last for? 

According to the experts, tankless water heaters have a life expectancy of up to 20 years. And when things do go wrong it is easy for you or your plumber to fix whatever needs fixing!.

3: How many amp’s are needed for tankless water heater heaters?

Typically, an outdoor water heater requires a 40 to 50-amp when in use. Some 120V tankless water heaters do require separate breakers.

4: How many times do you need to lower tankless water heater’s heat?

In the past, tankless water heaters required frequent manual adjustments, usually, twice a year, once at the start of cold weather and again when the weather warmed up. Modern models allow you to set your preferred temperature and enjoy near-instant hot water.

5: What do you need to have a tankless water heater?

If you choose an electric-only 120v tankless water heater all you need is a space and power supply for the unit. If you decide to go for a 120V gas tankless water heater you will require a gas connection, power supply, and a vent to allow the gas fumes to be vented out.

Non-tank units include the same in the product of the fuel tank type. All you need is electricity and water. When you have an electric heater installed by an expert, know the electrical equipment requirements, the additional cables that need to be installed with a motor home, and the weather of your home.

What is an energy factor for water heaters

An energy factor is a measure of how efficient an appliance, such as a water heater, is in converting electricity or gas flame to useful heat. 

 Casing insulations material makes a difference. But the biggest factor is the heat exchanger construction. Typically there are two options- copper and Stainless Steel. Copper heats up much quicker than Stainless Steel but it can corrode over time which means the owner has to replace it eventually. Stainless Steel doesn’t corrode but takes longer to get hot, meaning more wasted electricity and cold spots.

estimating-costs-and-efficiency-storage-demand-and-heat-pump-water-heaters

Conclusion

What is the best 120-volt water heater?

The answer to this question depends on a number of factors. There are many choices, and each has its own set of benefits. Choosing the right unit for your needs should not be difficult now. 

We’ve done most of the work for you by researching and testing dozens of different tankless hot water heating systems in order to find out which ones perform well and which ones won’t cut it in your home or business. This Guide will hopefully have helped answer any questions about finding the best 120 Volt Tankless Water Heater.

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