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Best Electric Tankless Water Heaters in 2021 (Reviews) – Buying Guide

November 4, 2020 by Adam Leave a Comment

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People prefer tankless water heaters for better energy efficiency and to save up space as well. For small homes, who consider energy efficiency an ideal choice, going for an electric tankless water heater is a perfect idea.

Now, people no longer prefer the conventional water heater as it takes time to heat the water. When there is no tank, the best electric tankless heaters never run out of water. Problem solved!

You can always enjoy the warm water, anytime to want, within a few seconds without waiting. Isn’t it perfect?

Get a tankless electric water heater that works correctly according to your requirements. Especially check the flow rate of the electric tankless heater to use the multiple showers at the same time. Check the on-demand electric water heater reviews for better understanding.

Table of Content hide
Top 10 Best Electric Tankless Water Heaters
1. Bosch Electric Mini-Tank Tankless Water Heater – Best Choice
2. EcoSmart ECO 18 Electric Tankless Water Heater – Best for Whole-House
3. Rheem RTEX-13 Electric Tankless Water Heater – Best For Residential Use
4. Eemax EEM-24013 – Under the Sink Tankless Water Heater
5. Rinnai RL94IN RL Series – Best for Indoor
6. ECOTOUCH Tankless Water Heater – Self Modulating
7. Marey Power Pak Plus – Small Sized Electric Tankless Water Heater
8. EcoSmart POU 3.5 – Best Point of Use Electric Tankless Water Heater
9. Stiebel Eltron 074056 – Best Commercial Electric Tankless Water Heater
10. Stiebel Eltron Tempra Plus Tankless Electric Water Heater
Conclusion:
Buying Guide
What to Consider when Purchasing the electric tankless water heater?
Frequently Asked Questions
Related Posts:

Top 10 Best Electric Tankless Water Heaters

Without further ado, Let’s go through the reviews of these 10 best electric tankless water heater in the list below.

1. Bosch Electric Mini-Tank Tankless Water Heater – Best Choice

Bosch Mini electric Tankless water heaterBosch is a German-owned company that has been around since the late 1880s; this company strives to make life easier for anyone who chooses to buy their products. They don’t use any foul play and have straight up products that provide you the essential help.

For the water heater, the Bosch Mini water heater doesn’t take a very long time to make water useable for you. The water heater’s maximum capacity is 1440 watts and has a good potential of reaching 65-145 degrees F. This provides a continuous stream of warm and soothing water, which can be altered for your showers. This water heater makes life so much easier for you.

Not only does it efficiently heat the water for a good bath or shower, but it also is easy to install. This heater can be wall-mounted much more quickly than other heaters and can be stuck and attached to any shelf or floor. There will be no hassle, and you will enjoy a good bath without a huge hassle.

This best tankless water heater for RV can be installed both horizontally and vertically. This also affects how much water the heater can pass over to you. If installed vertically, the water heater can provide 5.1 liters. And if installed horizontally, it will quickly provide its full capacity, which is 7 liters. Also, to add on to the articles, these are tankless water heaters. That means the water is being processed and passed out without having the heater’s hassle of installation.

Why do we like it?

For this heater to work, your electrical energy should at least be 120V; this will make sure the heater will work efficiently and not die out during your showers.

There is a thermostat that lets you control the influx of how hot you want your water to be. And there is also a pressure valve at the top and then continues on sideways to expose a water inlet, which lets you install cold water and hot water inlet. This electric hot water heater will need individual installments in every bathroom. Also, it has dimensions of 17.5 W x 17.5 H x 14.5 D Inches.

Pros
  • Compact and small & can heat up to 7 liters of water instantly
  • It has a thermal efficiency of 98%
  • Budget-friendly
  • Easy to control and circulate
  • Has easy electrical connections
Cons
  • When the heater is installed sideways, it will reduce the capacity of water provided.
Check Price on Amazon

 

2. EcoSmart ECO 18 Electric Tankless Water Heater – Best for Whole-House

Ecosmart ECO 18 Electric Tankless Water HeaterEcoSmart is also a well-known brand that provides more comfortable lifestyle options. For anyone who wants an excellent economic water heating system, it provides a perfect product which not only provides savings on electricity bills but all helps save water wastage during water heating. This water heater is from the company of EcoSmart, which is under the ownership of Rheem company ownership.

This water heater is known to save almost 50% of space when installed compared to other water heaters. You can use this water for providing instant hot water heater to the whole house.

This water heater is on North -American standards and is supplied all over the world. These heaters do not overpower the place with their existence but bled into an average one tone bathroom. These have a wide surface temperature control with an LCD screen installed right on the front of the water heater.

These are great for the entire home and can efficiently heat 2.5 gallons per minute. This is equivalent to a person having a whole shower. This can be used for the entire house evidently. It is easily one of the best things which can happen to a regular income household; there will be no way you won’t feel warm with this cozy choice.

This company provides useful appliances for every middle-class household, which needs quick and easy hot water delivery while saving on space, time, and energy.

The water flow also depends on what the water inlet is. This allows the user to have the ability to control how much water they can heat and use while they’re at it.

With an inlet of 62 degrees F, the water heats up to 150 degrees F. This ensures that the user will surely get their desired heat in their water and not have to be bothered by a fluctuation mid-shower.

Why do we like it?

This company also delivers a buying guide, which ensures that you get exactly what you need. You will need to realize that buying a larger sized water heater means that colder temperature water can be heated much more quickly. A colder environment will need a larger heater. But all in all, this one is the best whole-house electric tankless water heater.

Pros
  • Easy usage and easy controls
  • It takes a few minutes to warm and heat 2.5 gallons of water.
  • Saves energy bills and water wastage
  • Compact and small
Cons
  • It has a few warranty issues
Check Price on Amazon

 

3. Rheem RTEX-13 Electric Tankless Water Heater – Best For Residential Use

Rheem Electric Tankless waterThe RTEX-13 whole house electric tankless water heater model is one of the best electric tankless water heaters. Rheem is a renowned name when it comes to technologies and provides their customers with the right detail they need to ensure that they have a comfortable living.

This water heater requires you to provide a smooth flow of 80 amp of electricity to ensure that you’re getting the right heating and a continuous flow of warm water with the risk of your light and switches flickering here and there.

This Rheem RTEX-13 electric tankless water heater 13 kW water heater is one of the square best electric tankless water heaters that have a digital display in the front, making it easier for you to set the temperature to what is required by you. The temperature increment only allowed with 1 degree. You will need to take your time while adjusting your temperature requirements.

The water heater is decently small and has a good silver color, which is pretty sleek, and this water heater also has a great interior with copper linings and tubing. This water heater heats the water at a perfect pace and allows the user to have a good water heating source.

Also, this electric tankless water heater is best for a family of 3-4 people. You can use one shower, kitchen faucet, one sink and one other shower at the same time with this most efficient tankless water heater.

Why do we like it?

The water heater can be easily installed and it is mostly mounted on the wall. The interconnection is very easy to understand even for people who are new to the idea and have an extensively easy way of installing everything, such as the hot and cold water inlet. And threaded for easy replacement too. The front has a screen display of what temperature is there. Also, it has Dimensions 18.5” x 3.5” x 14.5”.

We’ll be honest with you Rheem has a few defects that you will need to keep an eye on continuously, and you will, at some point, need to get in contact with the company directly instead of going to the numbers listen on Amazon. Sure, they do have a refund policy and can provide you with excellent service, but you need to keep your slate clean and make sure you have the right sources. Overall, it is a great product that most defiantly serves a great purpose, and the users do seem satisfied with what they are presented with.

Pros
  • Easy dial adjustment
  • Has easy installments
  • Light and compact do the job
  • Durable double copper emersion
  • Even heating with a simple heater system
  • The digital display allows for easy reading
Cons
  • You will need to keep the wiring in check to ensure you’ve done it correctly.
Check Price on Amazon

 

4. Eemax EEM-24013 – Under the Sink Tankless Water Heater

Eemax Tankless Water HeaterA better size comes with a better deal, well, this is here to save you adequate water supply while still maintaining a sufficiently suitable size. Eemax enables the ability to provide you and your family with a sufficient amount of water throughout your usage. This does not only stop at being used in the kitchen or by smaller water outlets, but people can use this in the shower while there is enough water in the water outlet to be used efficiently.

This provides an excellent stable amount of water while it does not overheat your water supply if the water is less in amount. This makes it easier to use and allows the user to shower or wash the dishes without worrying. This water heater, just like the rest, only provides you’re the amount of water you need and want when you want it to.

The company also provides its users with multiple size choices to choose from to ensure that your house has the perfect amount of warmth the water you need. Various sizes accommodate a certain amount of water for the family in each separate accommodation.

The Consistency in every way inlet is very precise for sure, without a doubt.

Why do we like it?

The Eemax is a vibrant blue color that is easy to fit into smaller spaces and can be wall-mounted for ease. The inside of the heater is circulated adequately with every type of wiring individualizing from the other to ensure that every task is kept proper and does not intertwine and cause the user any problems.

The heater also has a knob at the front with a smaller LCD included, displaying the heat and temperature your water is being warmed at. This allows you to be in proper control of how hot or warm your water is. And since it has an open display, it will enable you to charge what temperature you set it to.

The heater comes with a proper instruction manual telling you what your temperature requirements should be and which product you should buy to ensure a constant supply.

The product is relatively lightweight and has the right way of providing water.

Pros
  • Easy display and Compact.
  • Suitable for two water sources in warmer months
  • Has a 5-year warranty
Cons
  • It could take a little longer and provide less in colder months
Check Price on Amazon

 

5. Rinnai RL94IN RL Series – Best for Indoor

Rinnai RL94IN RL SeriesThis is a water heater that is a little something that isn’t the norm nowadays, which is natural gas emissions for heating water. Though the traditional water heater does use gas, this water heater is much more advanced. And precisely what an electrical heater would and provides you a sufficient amount of warm water on demand.

The knowledge that we shared in the description of this heater is that using a water heater with water storage areas will require you to lose water and a lot of energy while it flows through the pipe systems to reach your showerhead.

And to save such wastage, this water heater is tankless and provides the user with warm water on demand at all times. According to the users, this water heater does not make you choose between chores or washing; this provides a fair amount of warm water all the time without a huge loss on all sides.

With a water heater, you will require to mount it to the wall to make sure you’re putting it somewhere safe and easy to reach. Well, as compared to the other water heaters, this heater is a little bigger. Though not humongous, this is still addressed as the size of a small suitcase, which might not be very suitable to put under a sink.

But this quickly provides a good enough supply to access in the whole house would mean that this needs to be installed in the basement where the primary sources of water are available, so this best electric tankless water heater can flow to reach where required.

Why do we like it?

The heater is slightly more expensive than the electrical ones, but the shower assured that this wouldn’t fail you. These are guaranteed to last your at least 20 years, which is a reasonable enough time limit for something which costs this much.

The heater also has parts which can easily be replaced; this means that you won’t have to buy a whole another set of water heaters to replace this one, but simply you would just have to buy a more part and simply swap it out, and you’re good to go for a couple of more years. The price is justified, and you’re defiantly getting a good deal.

Pros
  • Accommodates the whole house
  • Has a sound heating system which does not fall short
  • Supports up to 6 fixtures.
  • Easier to install
  • 40% Energy savings
Cons
  • A little bit bigger as compared to traditional water heaters
Check Price on Amazon

 

6. ECOTOUCH Tankless Water Heater – Self Modulating

ECOTOUCH TANKLESS WATER HEATERGood things do come in small sizes. With that being said, this is one of those good things you buy for the dale of warm running water every time you turn your tap. Such products mostly seem useless and sometimes maybe faulty while providing the whole house with a warm water supply buy.

This baby is supposedly installed under a sink or near the water outlet where required instead of installing it all the main water outlet to provide to the whole house. Since this is a tankless water heater, you need to plug the heater with a direct water source, which will instantly heat and outsource it to your taps.

In terms of sizes, the water heater is only as big as a box of oatmeal, which means there will be no hassle for you to install it into smaller spaces such as under a kitchen sink or with a shower inlet. This fits all smaller spaces and provided instant hot water.

What caught my attention personally was the detail of safety, which comes with this water heater. They have made multiple tests and tips and ways in which this provides a secure method of operating.

Your water inlet and the wiring inside the water heater separate, reducing the risk of a short circuit or leakage and making operations much more comfortable and convenient to handle. And you can go on about your day tension-free and not having to worry about what will happen frequently.

Why do we like it?

The company also puts the product under multiple tests, ensuring that you don’t get scammed of your money. And make sure they’re providing the right product that will not fail you in times of need.

Also including the fact that this saves energy. This product does not overheat your water if the water input is low; it easily adjusts the water temperature and provides warm water instead of overheated scalding hot water. The amount of water heated in the time given is very handy and can also have extended use in a shower. This is a significant investment.

Pros
  • Easy temperature control and reading.
  • Has a great temperature to water ratio and Instant heating
Cons
  • It is not suitable for supporting multiple connections in the house.
Check Price on Amazon

 

7. Marey Power Pak Plus  – Small Sized Electric Tankless Water Heater

Marey Power Pak PlusA cute little heater, which is great for small water supplies, contributes to only one specific water supply heating. For example, you could install this tiny fellow under a sink or near a shower and have a nice long warm shower while this heats just as much as you demand.

This is a minimal product, and it cannot provide a good amount of warm water for a bath, let alone the whole house. Since we mostly get what we’re paying for, this baby sure does provide you a good timely service for what you’re paying for. A small price to pay for heating a shower whenever you require it. These heaters are not to be taken lightly though.

This will definitely be there when all others fail. This will provide you a quick serving of warm water, and you’ll very easily accommodate warm water within minutes.

Not only this, but this saves energy as well. This heater does not waste energy at all. It works as an electrical heater but is not always working and will not be wasting energy. This starts heating water and starts its electrical Consumption once you need it and the rest of the time, it will be automatically on stand by and not using any sort of electrical Consumption.

Why do we like it?

The primary way of actually controlling the water heating system in this heater is to turn the amps down or up and it’ll heat your water accordingly. Since this is something that has used all year round you can control what temperature you want your water to be at the end not be scalding hot to burn you but warm and nice for a long shower.

This is only 7 lbs which are extensively small and you should definitely not expect it to accommodate you in long baths. And for cleaning the entire city, it’s a small water heater with an average price, not a miracle in a box. Keep your expectations pretty minimal and this may outperform but don’t expect it to accommodate something which is truly not promised.

Pros
  • It easily installs under a sink or a cabinet.
  • Easy to control the temperature
  • A straight forward and Lightweight device
  • Easy to install
  • Is not a huge hassle to deal with and has a reset button.
Cons
  • This heater is not big enough to accommodate a whole-house or provide water to multiple sources.
Check Price on Amazon

 

8. EcoSmart POU 3.5 – Best Point of Use Electric Tankless Water Heater

Ecosmart POU 3.5 Point of Use Electric Tankless Water HeaterEcoSmart no doubt makes the best electric tankless water heater. This company surely has been in the business long enough to know what the public wants from such products and allows them to take charge of their demand.

This company has been creating innovative products that make life easier for you and your family. And such as so they’ve made another small and compact little water heater which provides you with a good supply of water for a single sink.

This is the definite size for such a compact little water heater. This best point of use electric tankless water heater is not supposed to be used with a shower or bath supply. But rather should only be limited to being used for a sink and not expected to do much greater than what is recommended.

Since the size is small it only outlets 0.5 gallons of water per minute. This means it is suitable for a full wash sink but not for multiple pictures and shower supplies.

This is defiantly great for what is promised since the inner casing of each wire is made carefully and ensured to not fall apart. Also, while the tubing is made out of copper which ensures that the water heating is proper and does not lack what is promised.

This water heater is POU 3.5 which is good for only 0.5 gallons of water but there is also a bigger size than this which is POU 6.0 which allows you to heat water more efficiently. And much more effectively making it possible to use for multiple fixtures or even a proper shower. A chart can also help you in deciding what you should buy depending on what you need and not only what is available.

Why do we like it?

The water heater also has multiple stainless steel products used inside which are easily replaced and used instead of taking the entire system out you can simply replace the parts and have this working like a brand new water heater.

The Point of Use models are ideal for: Wet Bars, Strip Malls, Doctor’s Office, Boats, Recreational Vehicles (RVs), Bathroom Sinks. At the point when measured appropriately this water radiator will give perpetual high temp water.

Pros
  • Easy to install
  • Very compact
  • Super lightweight
Cons
  • Only supports one fixture of water
Check Price on Amazon

 

9. Stiebel Eltron 074056 – Best Commercial Electric Tankless Water Heater

Stiebel Eltron 074056Another small heater which provides you with the ability to control what temperature you want to provide for yourself while doing daily chores or while taking a long hot shower.

This is again a single attachment water heater and it makes enough warm water to supply to you for a good warm sufficiently heated usage.

This water heater is compatible with any small houses and may sort of water inlets. And you can also install them in RVs and conventional homes. This allows you to be in charge of where you put this heater in. This can be wall-mounted near the sink to allows proper and safe handling and your water won’t have to travel across multiple pipelines. This allows you to save time and water and used to save energy as well. Proportionally around 50% of energy saved while using this water heater. And you will be provided with hot water instantly.

This is also one of the few heaters which do not have a lot of noise and are nothing close to being very loud. It is easy to operate and has a quiet operation. And it allows the users to have not only hot water while using it but you won’t deal with housing water noise.

Why do we like it?

This is an overall safe thing to use since it has all the safety setting and has a good amount of control over how the temperature and everything works but in case this ever falls short or has a malfunction you can easily press a button at the back which resets the setting and allows you to back to square one and not have this heater overheat and damage your property and the surrounding near the heater.

Pros
  • Easy installments and reasonable control
  • Quick heating and less power Consumption
  • Less noisy and has a safety switch
  • Guaranteed to last long
Cons
  • The water heater does need a kick start of at least 30 seconds to start hot water flow.
Check Price on Amazon

 

10. Stiebel Eltron Tempra Plus Tankless Electric Water Heater

Stiebel Eltron Tempra Plus Electric Tankless Water HeaterAt last, a product which will sufficiently supply a whole house with hot water. This water heater is one of the best on the list and provides a whole entire house with sufficient hot water. Now imagine running 12 showers while other people clean the kitchen or perfume some task which involves having to use hot water.

Well, this can all be possible with this water heater which provides hot water on the spot. It allows all of the members of the house to be given their proper and the right amount of hot water they could need in one usage.

Now you won’t have to worry about the size of this water heater since it is a compact size water heater. A tankless water heater providing a whole house and multiple connections warm water instantly, and yes this is still the best electric tankless water heater that provides warm water out of the other end.

The case itself looks pretty full and normal like an old CPU but the inside of the heater looks perfectly normal.  And has insulated wire whole the coppers heating system attached. And a good amount of heating and lets you enjoy a good time without any worry about the whole house using hot water.

This also has a safety thermal cut off which provides you with the option of having an emergency cut off in case there is a mishap and you can easily search the source and get rid of the circumstance.

Why do we like it?

The heater also has multiple connections and sensors which allow you to be sure of what you’re getting.
This model also has a display with a dial that controls your temperature and allows you to choose what you want from the heater and it will suffice.

This is a good investment and has. 7-year warranty while providing you with a 3-year leakage warranty and makes it easier for you to replace a product if you’re not satisfied with it. It has multiple options to choose from. And models that accommodate more and more to having high hot water providing capacity. This allows you the option of using a better model with every need that may occur on your end.

While following the manual you will see multiple options in which you can install whatever heater which provides you the right capacity for usage on a daily basis.

Pros
  • Compact and No venting required.
  • Spare at any rate 15-20% on the boiling water part of your electric bill
  • Easy to install
  • Accommodates the whole house.
Cons
  • It may not be widely available
Check Price on Amazon

 

Conclusion:

The above list of 10 best electric tankless water heaters, are the best ones you can find, not only in terms of quality but also affordability. You can choose the most appropriate option based on electric water heater ratings and reviews. All of these water heaters are undoubtedly the best tankless heaters too that may somehow fall into your requirement for the water heater.

But for more detail on every particular product, you can look at the individual review available. Make sure you also check the buying guide before you settle for the best option. Moreover, some FAQs listed below for more information. Our best pick for the most efficient electric tankless water heater is Ecostar ECO18 Tankless Water Heater. Make sure you check out other valuable tankless heaters as well.

Buying Guide

Here is a comprehensive buying guide for you so that you can get plenty of knowledge about Electric Tankless water heaters before making a final decision.

What to Consider when Purchasing the electric tankless water heater?

Material

The material is an important consideration when you are planning to buy an electric tankless water heater. This water heater that you are planning to buy has to be a non-metallic water heater. When you are getting a water heater try to find out something that is not made of metallic. It will prevent the water from building calcium and limescale.

Flow rates

When getting a water heater, you need to make sure that the water heater’s flow rate has to be more than 4.0GPM. If it is higher than 4.0GPM, it is even better. When the rate of flowing water is more than 4.0GPM, it makes it easier for you to use multiple showers simultaneously.

Size 

The size of the tankless electric water heater is also very important. You will not like a gigantic water heater installed in your house. Therefore, look for a compact water heater that fits in small spaces very easily.

Energy Efficiency

The energy efficiency of the electric water heater is the primary concern. Try to find out the electric heater capable of providing up to 98% or higher energy efficiency. If not, there is particularly no advantage of getting an inefficient electric heater. The significant difference between gas heaters and electric heaters is energy efficiency. And if you are missing the point of Energy Efficiency, there is practically no major advantage.

Installation 

The installation of the best electric tankless water heater needs to be simple and easy as well. If it is complicated, it might require a lot of time for you to understand the installation process or pay extra money for the electric heater installation in your house.

Therefore, look for the best electric tankless water heater that is easy to install and does not require much effort.

 Warranty

The warranty for the electric heater also plays an important role. Make sure you find out the best tankless electric water heater that has lifetime support and a lifetime warranty. So you can get it fixed or changed when needed. It will save you some money, and you will not end up with a faulty water heater.

Cost

Cost is also another concern when you are planning to get an electric hot water tankless heater. Although most of the electric heaters are available in not so affordable prices, you can still find a few options that will be a perfect fit for your budget. More overcomer sometimes it is not so bad to invest in something a little bit expensive because it provides a long-term value of money. However, make sure the electric water heater you plan to buy is a perfect investment for up to 10 years.

Frequently Asked Questions

What are the advantages of using a tankless electric water heater?

There are several advantages of using the best electric tankless water heater that runs on electricity. Check out the details below to find out what are the benefits of using this water heater.

  • The best electric tankless water heater is much more energy efficient will stop it will save money over time by saving up on energy and electricity usage. The electric water tankless heater is a perfect choice for saving energy and a superior energy efficiency choice.
  • The best electric tankless water heater has a considerably longer lifespan. You can use these electric water heaters over the timeline of 10 years or more if maintained properly. According to the research, the best electric tankless water heater about twice more long-lasting as the traditional water heaters.
  • The storage space required for the best tankless water heater is a lot less. You can easily store the electric water heater anywhere when they are not in use. Moreover, the installation of the tankless water heater does not require a lot of space. So, you can have the best electric tankless water heater installed in the tightest and the smallest places in your house.
  • Typically in gas water heaters, you will have to wait for a few minutes to get the hot water. But in an electric tankless water heater, you do not have to wait a long time to have hot water. It takes just a few minutes to provide you hot water. Also, you can run multiple servers at the same time when you are using the tankless electric water heater. However, you need to consider the flow rate of the electric heater before buying it.

What should be the size of the tankless electric heater for your house?

The water temperature needs to increase up to 105 degrees, and the water has to be at least 5.2 gallons. So, you should look for the best electric tankless water heater that has the capacity of heating at least 5.2 gallons of water at 60 degrees rise in temperature per minute.

Which one is the best electric tankless heater?

When you need an electric tankless water heater, you will come across plenty of options. Above 10 are the best electric tankless heater is that you will come across. However, out of all the top choices, the Stiebel Eltron Water heater is the best electric tankless water heater that you will want in your house.

Is the electric tankless water heater for the house worth buying?

The initial cost of the best electric tankless heater is more than the traditional heater for your house. However, on the longer run, electric tankless heaters are the ideal options. These heaters for the home are not only energy-efficient but also save your money in the long term. Also, these electric heaters are more long-lasting and durable. And these heaters are much safer to use as compared to gas heaters.

Are there any disadvantages of getting an electric tankless water heater?

The only disadvantage is the higher cost of purchasing. Whereas the traditional heaters are not as expensive as the electric tankless heaters. Also, installing these electric tankless heaters can cost you a lot more than conventional water heaters.

Do electric tankless water heaters work well during the winter season?

Compared to the traditional gas water heater, you might feel the performance of an electric tankless water heater is not up to the mark. It is a massive setback of electric tankless water heaters that cannot perform as promptly and precisely as the gas water heater during winters.

How much electricity does the electric tankless water heater use?

The best electric tankless water heater usually uses up to 4500 Watts of electricity. The power consumption of the best electric tankless water heater is not as much as the conventional gas water heaters. A tankless electric water heater is much more energy-efficient to use.

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