Best Electric Tankless Water Heaters 2018 – Complete Reviews with Comparison


Tankless Water Heaters save on space, are very reliable, but also more energy efficient and economical than traditional water heaters.

These tanks are must have for any home owner, even more if you’re living in a remote area with small space.

But these water heaters can get really expensive, that’s why we created this free guide, that will help you decide which one to buy.

You most certainly don’t want to end up buying the wrong one!

Check out our Electric Tankless Water Heater Reviews below.
Check out our Electric Tankless Water Heater Reviews below.

Top Tankless Water Heater Comparison Chart

ModelElectric / Gas / PropaneFlow Rate (GPM)Temperature RangeRating / Price
Stiebel Eltron Tempra 24 Plus
Electric0.58 – 5.0086 °F – 140 °F4.5 out of 5

Check Price
EcoSmart ECO 27
Electric0.25 – 6.680 °F – 140 °F4 out of 5

Check Price
Takagi T-KJr2-IN-NG
Gas0.5 (estimated) – 6.099 °F – 167 °F3.5 out of 5

Check Price
Rinnai RL75iN
Gas0.4 (estimated) – 7.598 °F – 160 °F4 out of 5

Check Price
Titan SCR2 N-120
Electric0.5 – 4.0105 °F – 120 °F3 out of 5

Check Price
Eccotemp L5 Portable
Propane0.3 – 1.480 °F – 150 °F4 out of 5

Check Price
Noritz NRC98-DV-NG
Gas / Propane0.5 – 9.8100 °F -140 °F4.6 out of 5

Check Price

Rheem RTE 13
Electric0.4 – 4.0125 °F (Max)3 out of 5
Check Price
Eccotemp FVI-12-NG
Gas0.93 – 4.8140 °F (Max)2.8 out of 5

Check Price

Tankless Water Heater Reviews

1. Stiebel Eltron Tempra 24 Plus

This is the best tankless water heater money can buy.

We all know quality of German products. Well, the Stiebel Eltron Tempra 24 Plus is manufactured by Stiebel Eltron. Founded by Dr. Theodor Stiebel in 1924, the Germany Company is considered a market leader in the manufacture of water source heat pumps.

Editor’s RatingTop Features
4.5 out of 51. Long Warranty
2. Almost No Negative Reviews
3. Very Well Made

Product Highlights

This electric tankless water heater really is a great choice. It has all the features you want in a heater, but it’s also important, how satisfied other people are with the product you’re buying. With this specifically, there are almost no bad reviews.

What We Like

No other tankless water heater has the feature like this one – Tempra Advanced Flow Control. This is the key difference between Stiebel tanks and other brands.

If the flow rate exceeds the heating ability, other water heaters will shock you with cold water. But this tank will automatically reduce the flow rate and keep water from turning cold.

Read full Stiebel Eltron Tempra 24 Plus review here Pros

  • 99% energy efficient
  • Unique Tempra Advanced Flow Control
  • Great temperature range
  • Engineered from a company with very high quality products
  • Very well built – almost no negative reviews on product quality
  • 7 year warranty against leaks, and 3 years against any other defects


  • Not as affordable as other similar models

Get This Tankless Heater

2. EcoSmart ECO 27 Review

Small, smart, and efficient. The three terms symbolize the essence of the EcoSmart’s ECO 27 Electric tankless water heater.

In explaining this distinction, it is notable that a majority of tankless water heaters are equipped with a type of modulation vital in minimizing energy loss. This is achieved through a change of power supply, dependent on prevailing demand.

Editor’s RatingTop Features
4 out of 51. Small Size
2. Lifetime Warranty
3. Multiple Heating Elements

Product Highlights

EcoSmart’s own modulation system is able to squeeze out 99.8% energy efficiency! This means that the heating cost will be up to 50% smaller compared to other tanked heating systems.

What We Like

We like all of it’s features, especially the lifetime warranty! Turns out EcoSmart is really confident in this model.

Read Full EcoSmart ECO 27 Review Here Pros

  • 99.8% energy efficient
  • Can provide warm water in most situations
  • Inexpensive
  • Small in size
  • Lifetime Warranty


  • Possible temperature fluctuation

Get This Tankless Heater

3. Takagi T-KJr2-IN-NG Review – Best Tankless Gas Water Heater

The first Tankless Gas Water Heater on our list. It’s temperature range beats any other tankless heater in this price range. Read on.

Editor’s RatingTop Features
3.5 out of 51. Durable Design
2. Long Warranty Period
3. Vertical and Horizontal Venting

Product Highlights

Natural gas water heaters possessinnate advantages above electrical models, for example greater cost savings, faster water heating, and efficiency even when faced with power outages.

What We Like

Even though this model runs on natural gas, it is still small, compared to other gas heaters in the same price range.

Read Full Review On This Gas Water Heater Here Pros

  • Durable Design
  • Great Max. Flow Rate
  • Vertical and Horizontal Venting
  • Long Warranty Period
  • Better Energy Efficiency Than Other Tanked Heaters (but worse than electric)


  •  Higher Installation Cost

Get This Tankless Heater

4. Rinnai RL75iN – Natural Gas Tankless Water Heater Review

This is one of the best rated gas tankless water heaters. It is not that affordable, but definitely beats any other gas heater in this price range.

Editor’s RatingTop Features
4 out of 51. Durable Design
2. Long Warranty Period
3. Up to 7.5 GPM Flow Rate

Product Highlights

It’s flow rate is high enough for 3 bathrooms. Besides that, you also get two fuel source options – Natural gas or Propane. One might argue that Propane is more expensive, but it could be a lot more money-saving option on the long run.

What We Like

We especially like it’s Scale Detection System. It basically let’s you know once maintenance is required, therefore prolongs your heaters lifespan.

Read the Full Review Here Pros

  • High GPM Flow Rate
  • Scale Detection System
  • Temperature Lock – Safety System
  • Long Warranty Period
  • High Temperature Range
  • High Energy Factor


  • Not as affordable as other similar models
  • No Ventilation Kit

Get This Tankless Heater

5. Titan SCR2 N-120 – Best point of use tankless water heater

Want a reasonably priced electric tankless water heater yet a reliable unit from a leading company? Look no further than the Titan SCR2 N-120. While there are units in the market not costing an arm and a leg, their quality does not match with any other Titan model.

Editor’s RatingTop Features
3 out of 51. Tiny Size
2. Constant Temperature
3. 10 Year Warranty

Product Highlights

The first thing everyone notice is how big or small the specific heater is. This one in particular, is very small and handy. It also cost much less than most of heaters with the same features.

What We Like

Even though this product is very small, it can provide you with amazing flow rate – up to 4 GPM!

You can read the full review here. Pros

  • High GPM Flow Rate (Considering How Small the Heater Is)
  • Small in Size
  • Inexpensive
  • 10 Year Warranty
  • Constant Water Temperature


  • Works Best Only With High Inlet Water Temperature

Get This Tankless Heater

6. Eccotemp L5 – Best Portable Tankless Water Heater (Propane)

What can we say about the Eccotemp L5 Portable Tankless Water Heater? Regarded as the original and the best selling portable water heater on the market, this water heater gives you an endless flow of instant hot water.

Editor’s RatingTop Features
4 out of 51. Small and Compact
2. Very Affordable
3. Ability To Run On D-cell batteries

Product Highlights

This heater is very lightweight and small in size, inexpensive and can even run on 2 D-Cell batteries. That makes it a perfect portable solution.

What We Like

It is powered by Propane, which makes it very efficient and perfect for users on the go. It also comes with all accessories, you only need a Propane tank and you’re good to go!

Read Our Full Review Here Pros

  • Perfect for Users On the Go
  • Small in Size
  • Inexpensive
  • Comes With All Accessories
  • Ability To Run On Batteries (Not Included)


  • 1 Year Warranty
  • Wind might occasionally blow out the ignition flame

Get This Tankless Heater

8. Rheem RTE 13 (Electric )

Rheem a reputed organization, considering its more than 100 years of history. It is the largest manufacturer of water heating products in US and it tankless electric water heater offers continuous hot water quick and on demand for point-of-use applications. Not only it is small and compact (only 10″ * 7.25″ * 5″ and weighing in at 8 lbs) for its functionality, but it offers some great features that definitely makes it worth the investment.

Editor’s RatingTop Features
3 out of 51. Affordable
2. Easy To Install
3. Small Unit

Product Highlights

Key features of this water heater include industry leading low-flow activation and external temperature control. It has LED indicators for active element and standby mode and also supports 1/2-Inch water connections.

What We Like

We especially like how easy it is to install this unit. However, it is still recommended to have it installed by a professional and avoid any complications further down the road.

Read the full Rheem RTE 13 Review Pros

  • Cheaper compared to similar models
  • Small in Size
  • Energy Efficient


  • Bad Reviews
  • Not suitable for bigger families

Get This Tankless Heater

9. Eccotemp FVI-12-NG – High Capacity Gas Tankless Water Heater

This natural gas powered, indoor tankless water heater is designed for regular hot water needs of small homes, cottages or apartments. It supports a maximum flow rate of 4.8 GPM and can run a lot of activities within a home at the same time.

Editor’s RatingTop Features
2.8 out of 51. 2 Year Warranty Period
2. Questionable Durability

Product Highlights

Its energy efficiency is 0.79, which looks okay for a natural gas-powered solution, but pretty low as compared to electric solution.

What We Like

It’s easy to install and also comes with Horizontal Venting Kit.

Read the full Eccotemp Water Heater Review Pros

  • Comes With Venting Kit
  • Easy To Install
  • Temperature Control With Digital Display


  • Only 2 Year Warranty
  • Not Sure How Durable It Is
  • High GPM Activation Rate

Get This Tankless Heater

Buying Guide

Read our tankless water heater buying guide 2018 below.
tankless water heater buying guide 2018

Tanks are a common sight. You might see some located on the side of a house, with the tanks saving much needed water for subsequent use. Exposure to weather elements influences if the stored water is either cold or hot, dependent on the season. Well, in summer, chances are that its hot water that can be utilized in a variety of ways. However, this method is more of ‘old school’, when compared to existing developments.

Well, what is the tankless water heater?

Tankless water heaters are referred in a number of ways, as either ‘instant’ or ‘on-demand’ heaters. They are unique systems that enable easy access to hot water, whenever required. These items are quite beneficial, providing a diversity of benefits that not only includes ‘an endless’ hot water supply, but also high energy efficiency that is useful in cost-saving. These products have a small environmental footprint. The key words are ‘savings on energy bills.’ Accordingly, it is without a doubt that these products possess unique advantages, which distinguish them from ‘old-style’ tank water heaters.

What To Look For In Tankless Water Heater

It is a difficult endeavor to rate and review which tankless water heaters fit the threshold for Top 10 listing, given the diversity of aspects that require consideration. Amongst vital factors of consideration, three core specifications required considering: the flow rate, temperature rise, and features.

Flow rate: Measurement in GPM – gallons per minute, and refers to the quantity of water which can be delivered by a tankless water heater. The values accrued range from the maximum to minimum flow rate (the minimum flow necessary for activation of the heating function.

Temperature Rise: It is the difference between outgoing and incoming water temperatures, dependent on the desired level of outgoing water temperature rate. Therefore, if the incoming water temperature is roughly 50 °F and the desired/set level of outgoing water temperature is at 105 °F, then the temperature rise required is 55 °F. Accordingly, whenever the temperature rise is great, the result is a lower flow rate due to the necessary increases time for required heating of the water flowing through the unit. 

Features: The variety of available tankless water heaters are characterized by distinct features such as safety locks and flow control, in addition to unique installations and heating methods. All these decisive variables are considered in the determination of a final ranking.

In addition, we also consider key aspects such as quality assurance of a given unit, with this endeavor augmented by various customer reviews concerning the brand’s overall reputation. As a customer, it would be quite annoying to purchase a unit, endeavor in its expensive installation, only to realize that the particular unit bought is not the ‘right fit’ for your home or working space.

It is because of such uncertainty that customers are glad to have lists such as this, which are quite handy in the decision-making endeavor.

If the tankless water heater does not match the required flow rate of your house, it emits the cold water. This cold water is coming from the faucet. But, also some mechanisms are built in the heater to prevent this problem. Also, some manufacturer refers you to install the valve to control the ultimate flow rate.

So, it is important to consider the temperature rise as well as the flow rate. Thus, you can avoid any problem.

Then how do we determine the actual flow rate of the unit we require?

At first, you need to determine the maximum GPM requirements. You will get the maximum GPM by including each and individual flow rates together. Some common GPM values of household utilities are,

Ø  The GPM of kitchen sink is 1.0 to 2.0 GPM.

Ø  The GPM of washing machine is 1.0 to 1.5 GPM.

Ø  The GPM of bath tub is 4.0 GPM.

Ø  The GPM of shower head is 2.0 GPM.

Ø  The GPM of dishwasher is 1.0 to 2.0 GPM.

·       Consider the temperature rise- You should consider the temperature rise which is important. You need to check the temperature of the incoming water of your house.

Also, you should count the temperature that coming out. Generally, the incoming temperature is around 50 °F. Basically, it depends on the season and where you live. The output temperature range varies from 100 °F – 120 °F.


In that case, it is recommended to calculate the lowest inlet temperature. Thus, you will know that your tankless water heater can handle the temperature rise or not.

You need to determine bathroom sink, dishwasher and standard shower head etc. These all required 3.5 GPM. Then, you also need to determine the inlet water temperature that is lower than 45 °F. Also, you need to require the 105 °F output temperature.

Most of the manufacturer provides this information.  While purchasing, you need to understand the full details.

Point of use:

If you have a lot of requirements, you need to choose either type of installation. The whole house set up will connect to the house water inlet. It will provide the warm water for all applications. The point of use installation is required for one application at a time. This installation is applicable for shower and shink etc. But, this point of use tankless water heater is less expensive. This is also less powerful and smaller than the whole house unit. There are many circumstances where you can utilize the point of use over whole house units.

Propane, natural gas or electrical?

There are three types of fuel tankless water heaters are obtainable. Nowadays, most of the modern units are powered electrically. Also, you will get many units that run on natural gas or propane.

Electric powered units are more energy efficient than other units. Also, cost of the propane and natural gas units is higher than the propane electric powered heater. But, these propane and natural gas units are not powerful. These are fully dependent on the manufacturer of the model. Generally, the propane fuel source is expensive but also it is extremely efficient for heating purpose. If you are purchasing the propane fuel source, it will be the best option.

Natural gas and propane powered units need ventilation. By using this ventilation, it eliminates the exhaust. This ventilation goes through the roof vertically and goes through the wall horizontally.

If you are choosing the electrical powered tankless water heater, it will be the best decision. This tankless water heater is fully eco-friendly as well as easily accessible. The popularity of this heater is increasing rapidly.

Professional installation:-

All tankless water heaters need the professional installation. While installing some questions or points come in to your mind. These are,

·       Do you have the proper power requirement?

·       Are you determined the place where you install the unit?

If you are hiring the best company, they will guide you these questions properly and provide you the best advice. Also, you need to consider the gas line, water line and electric outlets. If you want to install the natural gas or propane unit, you need to keep in mind some important things. If you are hiring the best manufacturer, you will save a lot of money and also your device run properly.

Best Tankless Water Heater Noritz

If your budget allows, we most certainly recommend buying Noritz tankless water heater. Many users have given great reviews, which is definitely one of the things to look for when buying a new unit.
This model is extremely energy efficient and powerful. So, if you’re looking for those features, Noritz is definitely the right choice for you.

We all know how important GPM rate is, and this one has an amazing 9.8 GPM flow rate!

It’s warranty lasts for 12 years, which is much more than most of the other heaters provide.

There is no heater without cons, and this one isn’t exception either.

Cons: It’s more expensive, Minimum temperature is quite high. Besides that, it’s also bigger than other models.

Best Tankless Water Heater Outdoor

If you’re looking for the best outdoor tankless water heater, Eccotemp L5 Portable might just be the answer to your prayers.

It’s a low budget heater, but don’t let that fool you. It has everything you’d want in a model for outdoor use.

It’s small and very portable, provides enough flow rate for basic users, and even runs on battery if you want. Those however, are not included.

Besides that, it comes with all accessories you need to have to be able to use this model, and is still very affordable!

Maybe you’re going camping, wanting to use this tankless heater for outdoor shower, for mobile home or even for family of 4. It doesn’t matter, this model will fulfill your needs plus save you some money.

This model is also the best RV tankless water heater!

About Us

Hello and thank you for taking an interest in us. If you’ve made it this far, there is a good chance that you’re interested in buying one of the best tankless electric water heaters. The good news is that we’re here to help. This website is completely dedicated to the best electric tankless hot water heater. We understand that consumers do not wish to throw their money away. That’s why we’ve put together this website. We want to make sure that the consumer is able to get the most out of their money and acquire the overall best tankless water heater for their individualistic needs and preferences. More about us and our vision will be provided below.

What We Do

Really, we’re just ordinary individuals just like you. We demand and expect the best from our appliances. This is why we’ve decided to create comprehensive electric tankless water heater reviews. We aim to provide the consumer with the electric instant water heater reviews that they need when they need them. We want to make sure that our visitors have an adequate amount of information to acquire the best water heater for their needs. The tankless water heater reviews on this website are honest and unfiltered. The user can depend on the information provided and use it to guarantee that they’re able to make the best choice for their money.

With our assistance, you’ll have little to no trouble getting the right electric tankless water heater for your needs.

Our Primary Goals

When designing this website, our team had several goals in mind. The most important is providing visitors with the best tankless water heaters reviews humanly possible. Whether you’re looking for the best tankless gas water heater or you prefer an electric model, we’ve got you covered. We offer reviews for the best rated tankless water heaters electric and gas. We understand that our electric tankless hot water heater reviews can educate and empower our readers. This brings us to another goal. We designed this website with the intention of educating consumers far and wide.

We want to make sure that consumers have all of the information and knowledge required to obtain the right top rated tankless water heater for their home. When you read an electric tankless water heater review on this website, you can rest assured knowing that the information provided is truthful and honest. If we’re able to help you obtain the right water heater, we’ll feel that our electric tankless hot water heaters reviews have served their purpose. And, we’ll feel that we accomplished something great.

How We Can Help

Our team is focused solely on providing visitors with the assistance that they need. This is why we’ve done our very best to assemble as many whole house electric tankless water heater reviews as possible. We offer other forms of information as well. If you’re not looking for tankless water heater reviews electric or gas, you may need help installing your water heater. We’ve got you covered. This website is completely dedicated to tankless water heaters. Besides tankless water heater electric reviews, we also offer buying guides and tutorials.

Whether we’re constructing a tankless water heaters review or an installation tutorial, we strive to ensure that our content is user-friendly. We sincerely hope that our tankless electric hot water heater reviews, tutorial and buying guide have been beneficial for our visitors.

Specifically For You

One thing that consumers are always looking for in products is affordability. In addition to this, they expect nothing but superior workmanship. This is where our website comes into play, as it breaks down various models of tankless water heaters. In fact, each review contains a list of pros and cons, notable specifications and an overall assessment of each model listed on our website.

With our reviews, consumers can choose the best electric tankless water heater for their home. Our reviews are not just filled with subjective content, which is normally how product reviews are written. With our long-term experience, we can provide consumers with an accurate written analysis of a variety of brands, including both gas and electric models.

We have combined our knowledge, skills and experience to create this website for consumers who are interested in learning more about tankless water heaters. You can bank on our tankless water heater electric review to help you find a model that will provide your family with instant hot water, durability and longevity.

Why We Selected Tankless Water Heaters

We’ve dedicated ourselves to writing the best tankless water heater electric review and buying guide for numerous reasons. Even though these products have been on the market for years now, homeowners are still not realizing all the benefits that they can reap from these products. With our knowledge and know how, we have the resources to explain to you just how much any homeowner can benefit from one of these innovative products.

Saves You Space

The first and most noticeable benefit is that these products easily mount to a wall, rather than sitting on the floor. This could potentially save you tons of space in your closet or basement. If your current water heater is located in your closet, there is a good chance that you probably don’t even have any room to store anything else in there. However, once you install a tankless water heater, you will actually be able to utilize that closet for storage purposes.

More Energy Efficient

Tankless water heaters are extremely energy efficient. In fact, our team can tell you that tankless water heaters can use anywhere from 30 to 50 percent less energy than a traditional unit. This newer efficiency rating could save the traditional sized family up to a $100 a year, depending on the water consumption in the home. These innovative units are able to accomplish this, because they eliminate the cost of storing 40 to 50 gallons of water like the conventional units do.

On Demand Hot Water

One of the most impressive things about these tankless units is their ability to provide hot water on demand. With a traditional unit, you have to wait anywhere from 10 to 20 seconds until your water gets hot, but that is something you will never experience with a tankless unit. As soon as you turn on your faucet, you will receive hot water. These perks are the very reason we’ve decided to dedicate this website to tankless water heaters. We sincerely hope you’ll return again in the future and that our site has proven to be beneficial to you and your family.

If you want to keep up with the trend, make sure to read our blog, where we post news on tankless water heaters daily.


Please enter your comment!
Please enter your name here