best tankless electric water heaters
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The 6 Best Tankless Electric Water Heaters of 2024

Are you tired of the cold water coming in your taps and the time you must wait to get the hot water? Do not worry; the electric tankless hot water heaters are a solution to your problems. These water heaters have extra features to help you conveniently get hot water.

With the arrival of winter, there is an uplift in demand for hot water. The old and traditional water heaters cannot fulfill the demand. In this case, the best tankless water heaters can do the job for you.  These heaters are designed with some extra features that we use for the luxury feel. We get instant hot water just by clicking a button. These tankless water heaters also have the upper hand as they consume significantly less space. The experts try and test all the following tankless water heater suggestions.

Best Tankless Electric Water Heaters -Comparison Table

IMAGE PRODUCT FEATURES PRICE
 Rheem RTEX-24 24kW 240V Electric Tankless Water Heater Rheem RTEX-24 24kW 240V Electric Tankless Water Heater
  • Tankless Design
  • Advanced Heating Technology
  • Digital Temperature Display
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Stiebel Eltron 239223 Tankless Water Heater Stiebel Eltron 239223 Tankless Water Heater
  • Energy Efficient
  • Continuous Hot Water
  • Advanced Safety Features
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Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater
  • 240V Power Supply
  • Electric Heating Chamber
  • Modulating Heat Exchanger
  • Self-Modulating Technology
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Tankless Water Heater Electric ECOTOUCH 9KW 240V on Demand Self-Modulating Instant Hot Water Heater Tankless Water Heater Electric ECOTOUCH 9KW 240V on Demand Self-Modulating Instant Hot Water Heater
  • Self-Modulating Technology
  • Instant Hot Wate
  • Digital Display and Touch Control
  • Overheat Protection
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Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8) Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8)
  • Easy Installation
  • Fast Recovery Rate
  • Efficient Insulation
  • Versatility
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Ecosmart ECO MINI 2.5 Ecosmart ECO MINI 2.5
  • Compact Design
  • Adjustable Temperature
  • Self-Modulating Technology
  • Easy Installation
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Best Tankless Electric Water Heaters – Expert’s Review

1. Rheem RTEX-24 24kW 240V Electric Tankless Water Heater – Electric Tankless Water Heater

Whenever we talk about best electric tankless water heaters, then it is often hard to find one with all the specifications I require. The search ended when I found the Rheem RTEX-24 instant water heater. The heater has an easy operation system so even youngsters can switch it on and enjoy a hot water bath.

The best part I love about the instant heater is its self-modulating heater system, through which I can easily control the water inlet/outlet and the temperature without hassle. There is a screen on the automatic water heater, which makes it convenient for me to keep notice of the temperature of the water.

This model by Rheem comes with ¾” NPT fittings, a standard fitting in most countries, and almost fits in all types of pipelines. The heater can give almost hot water of around 5.9 GPM, which goes great for the kitchen and two bathrooms at peak hours. 

Rheem works at 24 KW energy to produce multiple gallons of water in a minute which is not heavy on the pocket, and I save money. There is no water wastage due to the close installment, so we are always nature friendly. The heater is small, so it does not take up extra space.

Rheem RTEX-24 24kW 240V Electric Tankless Water Heater
4.3/5 Our Score

Specifications:

  • Label: Rheem
  • Color: Gray
  • Power Source: Corded Electric
  • Item Dimensions L*W*H: 18.25 * 14.5 * 3 5
  • Voltage: 240 Volts
  • Item Weight: 17.8 Pounds
  • Capacity: 5.9 GPM
  • Included Components: Fittings, Aerators
  • Material: Stainless Steel
Pros
  • Requires no ventilation system; hence can be installed anywhere.
  • Optimized operation for easy temperature control.
  • Energy modulation for efficient energy control
  • NPT fittings for multiple water connections
  • ON\Off control dial for easy operating
Cons
  • A bit noisy, but this is how machines typically work.

I found Rheen RTEX-24 as one of the premium electric tankless water heaters as it has a good GPM value that goes great for a house with two rooms and a kitchen. This one is the best choice if you want efficient working.


2. Stiebel Eltron 239223 Tankless Water Heater – Small Hot Electric Water Heater

While searching for the small hot electric water heater, I found one by the Stibel Eltron. While going deep, I found that this heater is high-quality with some extra efficient features for better working. The heater is high quality with durable copper composition as we have used it for a long-time.

The tankless water heater is small in size, which helps us to adjust it in any space, even if it is a small mirror area. There is no need for ventilators as it is electrical, so we install them inside the washroom without making any extra holes. 

The heater works at 208 – 240 volts and gives out 0.39 gallons of water, by which we enjoy an economical and warm bath. With the German technology working, we rely on the heater for extra comfort. There is zero noise production in the heater for extra silence and comfort.

Stiebel Eltron 239223 Tankless Water Heater
4.6/5 Our Score

Specifications:

  • Label: Stiebel Eltron
  • Color: White
  • Power Source: Hard Wiring Required
  • Item Dimensions L*W*H: 4.63 * 16.63 * 14.5 Inches
  • Voltage: 240 Volts
  • Item Weight: 1 Pound
  • Capacity: 0.39 Gallons
  • Included Components: Piece Electric Heater
  • Material: Copper
Pros
  • Automatic water temperature adjustment with the German Patented Technology.
  • Conventional with minimum energy composition.
  • Extra efficient with German Technology.
  • Constant comfort with automatic temperature adjustment.
  • Silent operation for a noiseless bathing experience.
Cons
  • On overloading, the water pressure might be a bit low, but that is special to help you go for uninterrupted bathing.

The Stiebel is one of the premium small hot electric water heaters with efficient working. I found the heater the best choice for people who want to relax with a hot water bath and need a one-tap electric tankless water heater.


3. Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater – Best Tankless Electric Water Heaters

On research throughout the internet, I found the Rheem 240 V heating chamber as one of the best tankless electric water heaters. The heater comes with all the features one might need for a comfortable and relaxing hot bath.

On top of all, there is a LED display on the face of the heater, which makes it easy to note down the temperature and adjust it according to the choice. The heater is accurate about every temperature, so we can go for perfect and complete temperature control. 

Double copper filaments are attached to the heater, so we get instant hot water in no time. The heater comes with a self-modulating system that we use for convenient operation. There are ½ NPT attachment systems in the package that make the installation easy, so we did not spend any extra installment free.

The electric tankless heater was very efficient and saved energy with a 98.8 bill reduction. The heater gives out about 1.5 GPM in all of our washrooms and instantly gets hot water in the kitchen. All of this works at a low power voltage of 54 A.

Stiebel Eltron 239223 Tankless Water Heater
4.4/5 Our Score

Specifications:

  • Label: Rheem
  • Color: Gray
  • Power Source: Batteries
  • Item Dimensions L*W*H: 12.63 * 8.25 * 3.63 Inches
  • Voltage: 240 Volts
  • Item Weight: 0.01 Ounces
  • Capacity: 1.5 Gallons
  • Included Components: Rheem RTEX-13 Residential tankless water heater
  • Material: Copper
Pros
  • Easy to operate with accuracy by the LED display.
  • Simple to install, so there are no extra installation costs.
  • Thermostatic control for the water temperature adjustment.
  • Battery-powered as an economical energy source.
  • Water shower heat for the conservation of water.
Cons
  • The heater is not for people who need high GPM value but goes excellent with low GPM value users.

I found Rheem one of the best tankless electric water heaters due to its sleek design and easy temperature handling. The heater is the best option for people looking for an economical yet easy way to put their hands on a relaxing hot water bath.


4.Tankless Water Heater Electric ECOTOUCH 9KW 240V on Demand Self-Modulating Instant Hot Water Heater

I have been looking for a small hot electric water heater for more than a year, and my search ended when I found the instant water heater by Ecotouch and fell in love with all the remarkable features. I have been using the heater for more than a year, proving it to be one of the best choices.

The most premium feature I love about the heater is its innovative self-modulation by which it only takes power according to the demand, so I get a meager energy bill. The power flow is automatically reduced for less usage, making the heater eco-friendly.

The water heater has a 9 KW heating system through which I instantly get almost 116 degrees of hot water just by clicking a single button. This feature also helps to avoid temperature fluctuations, and I save time in heating the water. 

I can easily adjust the temperature with the heater’s help of the microcomputer control. The element used in the heater has a unique technology that keeps all kinds of corrosion away from the pipes, which I find convenient for cleaning the heater. The scaling process is also prolonged with the separate water and electricity lines.

Stiebel Eltron 239223 Tankless Water Heater
4.2/5 Our Score

Specifications:

  • Label: Ecotouch
  • Color: Black
  • Power Source: 15.74 * 10.24 * 2.05 Inches
  • Item Dimensions L*W*H: 12.63 * 8.25 * 3.63 Inches
  • Voltage: 240 Volts
  • Item Weight: 10.93 Pounds
  • Capacity: 0.5 Gallons Per Minute
  • Included Components: 2x washer with filter, 2x mounting bracket, 1x ECO908 9 KW Instant Water Heater, Instruction Manual, 1x 8AWG power cord, 4x wall anchor and screws
  • Material: Aluminum, Brass, Metal
Pros
  • Wall-mounted for less space coverage.
  • Efficient with the intelligent operating water pressure.
  • Highly durable with aluminum and brass construction.
  • High flow rate for an efficient usage.
  • Safe with premium secure features.
Cons
  • Small in size with less GPM value; hence not for prominent families, you can use one with a high GPM value for the family.

I found the Ecotouch water heater as one of the premium small hot electric water heaters as it works with the help of an intelligent mini computer. The heater is a premium choice for people who want instant hot water with just a few clicks and want to save energy.


5. Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8) – Best Tankless Electric Water Heater

While looking through the best tankless water heater, I found the one by Tronic. Research proved that it is a premium water heater with quality features for quality usage. The features attract enough that you cannot put back this model when buying a water heater.

The water heater is premium and has CFC-Free foam insulation, so we get long-lasting and durable usage. It has a temperature and pressure valve attached to the heater, so the usage is relatively easy, and we get hot water according to choice on the go. 

The feature that I liked the most about this water heater is the mounting composition. It has a unique design, so we can place it anywhere on the floor, on a shelf, or if we want to mount it on the wall. The heater is compact and lightweight, so we can easily place it anywhere. 

A tank is also attached to the heater, so there is a backup of hot water even if the power supply is disconnected. We can choose.the tank size according to our choice and needs. The heater is very economical as it gives out around 65 – 145 degrees of hot water just by using 1440 watts.

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8)
4.5/5 Our Score

Specifications:

  • Label: Bosch Thermotechnology
  • Color: White
  • Power Source: Corded Electric
  • Item Dimensions L*W*H: 21 * 20.5 * 16.5 Inches
  • Voltage: 120 Volts
  • Item Weight: 29.5 Pounds
  • Capacity: 7 Gallons
  • Included Components: Rough Plumbing, Water heater, Parts, and repair
  • Material: Steel and Copper
Pros
  • Operates at high pressure for an even flow.
  • Multiple temperature ranges for easy adjustments.
  • High heating capacity for all kinds of usage.
  • Easy to mount to cut off installation costs.
  • Simple design to go well with any kind of decor.
Cons
  • It is a bit hard to maintain but you can do it by following the proper manual.

We can consider Bosch one of the best tankless electric water heaters due to its particular structure. The tank makes it an excellent choice for people who do not have continuous electricity choice.


6. Ecosmart ECO MINI 2.5 – Best Tankless Electric Water Heaters

I have been using the Ecosmart Eco Mini 2.5 instant water heater for more than a year, and it proved to be a luxury choice for a single bathroom. The heater is one of the best tankless electric water heaters.

The heater is designed to store almost 2.5 gallons of water, which I efficiently use even when my power source is not plugged in. I used the appliance line cord included in the package, which gives a premium installation feel. The heater is plugged into the 110 Volts outlet, which is readily available, so I use it everywhere I want.

With the pressure relief valve included in the package, there is no clogging in the pipe, and I can clean the tankless water heater according to my convenience. The heater is attached to the direct point of use, which has eliminated all of the wastage, and the heater is very efficient.

Ecosmart ECO MINI 2.5
4.5/5 Our Score

Specifications:

  • Label: EcoSmart
  • Color: White
  • Power Source: Battery Powered
  • Item Dimensions L*W*H: 17 * 10.9 * 10.9 Inches
  • Voltage: 120 Volts
  • Item Weight: 15.8 Pounds
  • Capacity: 2.5 Gallons
  • Material: Steel and Aluminum
Pros
  • Storage tank for a non-stop hot water supply.
  • 110 Volts output for an easy connection.
  • Pressure relief valve for an easy attachment to pipes.
  • Temperature control system to avoid overheating.
  • Easy to install with the included kit to reduce expenses.
Cons
  • The heater does not support a high-flow shower head. It is better to go for a low-flow one.

I found Ecosmart as one of the best tankless electric water heaters as it comes with an adjustment knob and is easy to install so that we can do all the job without any professional help. The heater is the best choice for people with less space to keep the heater.


Buying Guide

Whenever we go to the market to buy the best tankless electric water heater, it is hard to choose one. Purchasing a tankless heater does not only mean just picking one. It comes with a lot of consequences. Before going to the market, it is better to do proper research and evaluate your requirements with the features that simultaneously make the purchase a much easier and more economical task.

The Adequate Size Guide

Electric tankless heaters are available in multiple sizes. Each of them comes with its specific features. The electric heater you should get for your home should be the one which goes with your needs. The electric heaters are available in small, medium, and large sizes. 

The first factor you should keep in mind before buying an electric heater is the space you have to install a heater. If you have more space, it is better to go for a large heater, and you can go for a medium or small heater if the space is less. But this factor contradicts the usage. You have to evaluate hot water needs during peak usage hours. See how many taps work simultaneously and how many washrooms there are in your house. If the usage is high, you should go for a large one; if the use is shallow, you can go great with a small one. A mismatch of requirements with the size might result in less hot water. 

Another factor you should keep in mind before buying a heater is the area’s temperature. If you live in an area with low temperatures, looking for a tankless water heater that can work with high efficiency to heat the freezing cold water and make it perfect for your usage is mandatory. If you live in an area with high temperatures in winter, you can go for a small heater that would work to heat the water, which will go well for your needs.

What Are You Going To Use The Heater For?

Whenever you buy a tankless heater, it is imperative to see what you will use it for, either for the whole house or a single tap or faucet. If you use the heater for the whole house, go for a whole-house heater that provides warm water to the whole house. Go for a point-of-use heater if you want warm water in a single tap. 

Most tankless heaters require a proper fitting, so moving them from one place to another is sometimes challenging. If you plan to move your water heater from one place to another, it is better to buy a portable electric tankless water heater.

Energy Efficiency

It is always good to buy an energy-efficient heater. An energy-efficient heater takes less energy and gives the best results. These heaters take less time to heat the water and reduce utility bills.

The Capacity Of Heater

It is necessary to make your water needs match the heater’s capacity. Note down the temperature difference between the water that enters the heater and the one that goes out of the heater. You can do the calculation yourself, but a good heater installer can do the job for you. Determine the usage and calculate the amount of heat in kilowatts to choose the right water heater.

The Flow Rate

The flow rate of a water heater is measured in GPM. The GPM means gallons per minute. It is imperative to see how much water can flow through your heater at once. To find the right GPM value, you have to estimate the amount of GPM used at a time in your house. That includes all your showers and taps. The natural temperature of the water also reduces the GPM value. Choosing the correct GPM value will help you to use all the taps at once in your house. More GPM value allows you to use all the taps simultaneously. A large instant tankless water heater will help you do all the household at a single time.

Convenient To Use

Tankless heaters are designed for convenience. Convenience is one of the primary reasons behind the switch to tankless heaters. Looking for an electric heater that is easy to operate so you can get hot water with just a click is always recommended.

Extra Features

One should look for multiple features in a heater to add to the luxury feel while enjoying a warm bath. Some brands offer a noiseless heater, making it much more convenient to enjoy a hot shower. Most of you might prefer a compact water heater with built-in pipes so the heater fits in a small place and does not look like something extra in your washing area. Some devices have a digital display that might help operate the heater efficiently. You can also enjoy pre-adjusted settings with the memory feature, so the heater is always ready to use.

How To Maintain And Install The Tankless Heater?

One of the reasons to shift towards a tankless heater is convenience. They are hassle free to use, install and maintain.

Installation Of A Tankless Water Heater

The tankless water heaters are not difficult to install. All you need to do is research and find a suitable method to do the job. Here you go with the tips to install a water heater. 

  • The first thing you need to do is the water pipe size or the gas main if your tankless heater works with natural gas. If you do not know any of these, you can ask the house owner or the government officials.
  • Confiscate the old water heater and switch off all the water and gas supplies.
  • Install the new gas line that goes with the gas line size of your heater. This gas line will be installed from the gas line to the heater and become an energy source to heat the water.
  • Create PVC pipes so there is a way to intake fresh air easily.
  • Use a small pipe and attach the water supply line for the water to reach the heater. 
  • Make a cross-check if there is any leakage. Seal all the pipe joints, so there is no leakage in the pipe and heater installment.
  • Turn on all the supplies and enjoy the hot water bath.

If you find it hard to install a water heater by yourself, you can call for professional help who will do the job for just a few dollars.

Maintenance Of A Tankless Water Heater

As with other daily life essentials, the tankless heaters also come with some specific types of backlashes. To remove such problems, give your Best tankless heater a good cleaning therapy. If you do not know about the proper cleaning routine, here are a few of the tips you should know to keep your heater clean and enjoy long-lasting usage.

  • Remove all the mineral scales from your tankless water heater every six months, so they do not become a cause of the blockage.
  • Tighten up all the screws once a year for the best results.
  • Do not forget to run good detergent water through the heater after a few months. This will help you to maintain the PH value of the water.

 Furthermore, some professional ways can help you enjoy an easy water heater cleaning. You must fix bugs and enjoy an easy cleaning by hiring a few professionals.

Is it an excellent choice to buy a tankless electric water heater?

As a one-time thing, the eclectic water heater might look a bit expensive for you, but after buying it when you start using the electric water heater, it proves to be entirely worth it. The heater will pay back double the initial cost expenses. It is more convenient with some extra efficiency.

Do tankless water heaters come in an electric version?

Yes, tankless water heaters are available in both gas and electric versions. You can buy anyone according to your preferences.

What are the few common problems one might face while using an electric water heater?

Although electric water heaters come with a lot of advantages, there are still drawbacks that you need to handle to enjoy the best results:
Cold Water Sandwich
Mineral Buildup
Flame Failure
System Overload
Ignition Failure
Air Exhaust Or Air Blockage

What is the right size of the electric heater consisting of four people.

A family of four people needs a tankless water heater that comes with the ability to produce seven gallons in a minute. The maximum a family uses in the peak hours is about six and a half gallons. Besides all this, you also need to keep the number of total appliances in your mind.

Is it an excellent choice to add breakers to tankless water heaters?

Tankless water heaters do not need a breaker as the energy required to ignite the flame is very low. You can add one if guided by the manufacturers.

Conclusion

Are you still confused about your purchase of the best tankless heaters? Do not worry; we are still here for your help. All the above-given heaters are tested and of high quality, but to make your purchase convenient, our experts have compiled some top-rated heaters for a better and easy buying experience. You can buy any of them even with closed eyes.

I hope you have ended up buying the best tankless electric water heater. If there is still any confusion, contact us in the review or message box. Our other pages also have some considerable suggestions for you, don’t forget to visit them. Stay tuned for further updates. Happy shopping, Bye.

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