Best Tankless Water Heaters 2017 – Buying Guide

Best Tankless Water Heater Reviews

The tankless water heater is something that you should have at home. Instead of getting a large-sized tank water heater you should choose a tankless water heater. It is better and more efficient. A tankless heater will take less space and will also provide instant hot water. As compared to the traditional water heaters, the tankless water heater takes less time and also consumes less power.

These heaters are also easy to install. You may or may not need a plumber to fix it. As these heaters areBest-Tankless-Water-Heater an all in one unit. You just need to install or mount it on the wall and do some pipe fitting. It is what makes these tankless water heaters a better choice.

The purpose of the tankless water heater is to provide a constant supply of hot water. Unlike the traditional water heater which utilizes a tank to store water, this one works differently. The water when stored can get cold and takes the time to heat up. The tankless water heater, on the other hand, will work fast and heat the water on the go.

It is not easy to heat the water. If you have a storage tank in your home it will take the time to heat it. Once you have used all the water you will have to wait to heat it again. Thanks to the tankless water heating models, now you can heat the water without storing it.

There are a lot of important things that you should know about these types of water heaters. To buy one online you should be aware of their working, models, features, price, the flow of hot water, etc. To make it easy we provide you informative reviews. These are the reviews of the top five models available on the market. These are the best tankless water heater reviews on the web. These are the best models of tankless water heaters that you can purchase in 2017.

Best Tankless Water Heater 2017 – Reviews

Stiebel Eltron Stiebel $ 698.00 Stiebel-Buy-Now
Eccotemp Eccotemp $ 255.43 Eccotemp-Buy-Now
EcoSmart EcoSmart $ 449.98 EcoSmart-Buy-Now
Takagi Takagi $ 533.99 Takagi-Buy-now
Rinnai Rinnai $ 930.21 Rinnai-Buy-now


Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater

The Stiebel Eltron Tempra 24 plus Electric Tankless water heater is an excellent choice for your home. If Stiebel-Eltron-Tempra-Best-Tankless-Water-Heateryou plan to get an electric water heater then this is the best choice. It has excellent features and also the price is quite low. The low price and the features which it packs make it an attractive offer. You can easily buy it on Amazon. It is the state of the art tankless water heater. The technology used in this heater is better than many other brands of tankless electric water heaters.

Pros & Features:

  • Digital temperature control
  • No need for venting
  • Slim easy to fit design
  • Saves energy and lowers to cost of electricity too
  • It has a three-year warranty


  • What you may not like in this thankless water heater is the amount of water it heats at one time. Besides that, it is an excellent choice. It may not be a good choice for a shower.
  • The price is also quite high as compared to many other models.

This German made tankless water heater is an excellent choice for your home. The design is excellent and sleek. The design makes it easy to place anywhere. The weight of the device is also not too much. If you follow the instructions properly you can install it yourself easily. You won’t need any plumber to do the job for you. The digital display is at the top with the manual adjuster below it.
The construction and the technology of the heater ensure that you save at least 20% on your bills as compared to the tank water heaters. With the Tempra Plus technology (the latest in the water heaters) you get a continuous supply of hot water.

What you will like is the electric technology which it uses to heat the water immediately. The price of this electric powered water heater is less than many gas models. It consumes only 240 watts.
Another feature that you will like is the flow control. Now you can set the flow of water from the unit. It is what makes it more customize-able and easy to use.

The unit uses the advanced flow control technology. With this technology, you do not have to worry about temperature fluctuations. No matter how much water is flowing, you will always get the same temperature of water from the outlet.

Another benefit that you get on this German made Stiebel Eltron Tempra 24 plus Electric Tankless is, you will not need any venting. It is why you can fit the device anywhere. It is one of the most reliable tankless water heaters on the market.

What makes this water heater easy to use is the digital temperature. Now you can easily see the temperature of the water flowing from the unit and adjust it accordingly. All you need is to adjust the temperature and it will provide you the exact temperature of water. It is why this tankless water heater is the best choice among many others.

The price of this unit on Amazon is $698. Although, the price may be on a little high note, but still it is an excellent choice if you want the hot water supply for the entire household. We highly recommend the Stiebel Eltron Tempra 24 Plus Electric Tankless. It is a useful, highly reliable and an efficient water heater.

Brand Stiebel
Voltage 208/240 volt
Amperage 2×50 Min
Height 14 1/2
Dimensions 21.5 x 19.5 x 8.8 inches
Weight 15.4 pounds
Color N/A
Working pressure 150 PSI
Shipping Free
Warranty 3 Year
Customer Rating 4.8/5 By 143 Customers


Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater

If you are looking for a powerful tankless water heater with an effective heating system then the Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater is a good choice. Make sure that you read the review to know more about this product. Overall the product is good. The water flow is constantTakagi-T-KJr2-IN-NG and does not allow temperature drops. It is one of the cheapest models of tankless water heaters which are available on Amazon. We have reviewed a lot of water heaters but this one proved to be the best and the cheapest among the gas water heaters.

Pros & Features:

  • The digital display of temperature
  • Easy to install with true 1/2″ NPT fittings
  • Sleek design makes it safe
  • 74500 BTUs
  • Efficient working with the gas heating mechanism
  • 4.8 gallons per minute


  • Only a two-year warranty
  • Only good for smaller homes where the need of hot water is limited.

Speaking of water heaters there are these gas-powered tankless water heaters. The Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater is a gas heater. It means straight away that you will save a lot on the energy bills. The electric heaters no matter how efficient they are will still consume more energy than the gas water heaters. This water heater is an excellent choice if you are looking to go on a vacation or live in a cottage home.

This water heater is easy to install as it has a sleek design. Also, the horizontal stainless steel kit ensures easy installation. It is a ready to install kit. You do not have to worry about plumbing. Just plug in the pipes and you are good to go. It is why this unit is easy to operate. It is why we also recommend this water heater if you do not want to go through all the hassle of plumbing.
Another feature that we liked on this unit was its power consumption. When the heater is idol it only consumes 2 watts of power. When it is operational and heating the water it will only consume 10 watts of power. It means that you will save a lot on the energy bills.

The gas heating mechanism used in the heater is also cheap. It can heat the water to 77 degrees Fahrenheit at its peak while keeping the flow at a maximum.
This Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater also pumps 2.3 Gallons per minute which is more than enough to power the whole house. Another feature that you will like is that it is powered by natural gas.

This heater has been tested for better performance. It has the state of the art electronic ignition system which ignites the flame. Once the flame is ignited the gas keeps it alive. When you adjust the temperature the flame rises or falls to increase or decrease the temperature.

The temperate is played on the digital monitor. This makes it easy to know and controls the temperature.
Besides the digital temperature display, you will also like the gas and water controls. You can now adjust the gas and the flow of water. the water flow technology makes it even better.
The price of this tankless water heater is $255 at Amazon. The product also comes with a two-year warranty.

Brand Eccotemp
Voltage 110 volts
Hot water capacity 0.93 – 4.8 GPM
Height 14 1/2
Dimensions 4 x 15 x 24 inches
Weight 20 pounds
Color White
Gas rate 25,000 to 74,500 BTUs
Shipping Free
Warranty 2 Year Warranty Heater
Customer Rating 3.3/5 By 116 Customers


EcoSmart ECO 27 Electric Tankless Water Heater

One of the tankless water heaters which we liked the most and recommend for large energy savings is the EcoSmart ECO 27 Electric Tankless Water Heater. Among many, you will certainly want to buy this heater. It is an excellent choice for the household. It is reliable and also long lasting. If you want a water heater which is packed with various useful features, then buy this one. It is also one of the largest EcoSmart-ECO-27-Electric-Tankless-Water-Heatertankless water heaters on the market.

Pros & Features:

  • Endless supply of hot water
  • Excellent compact design
  • Digital temperature display and control
  • Lifetime warranty
  • Heats 3 gallons per minute
  • Self-modulation technology
  • More energy savings up to 50%


  • The price may be a little high
  • Less flow rate than a few other models

If you are looking for an endless supply of hot water when you stand under the shower, buy this tankless water heater by EcoSmart. It is an electric water heater. What is good about this heater is that it has a self-modulated heating technology. With this, the heater adjusts the temperature or regulates the temperature based on how much water is pumped in and out. In simple words, if you increase the water supply the temperature will automatically adjust itself according to the amount of flow of water. It is a great advantage, especially if you are taking a shower.

Installation of this water heater is also easy. You can quickly mount it on the wall. Thus it provides you extra space. The design is quite comfortable and sleek. It does not take a lot of space like the storage tank heaters.

This tankless water heater will provide you 3 gallons of hot water in one minute. It is also better than many other old models of these water heaters available on the market.
What you will like the most is the one-degree increment feature. It means that you can adjust the settings so that the temperature keeps on rising after every minute from 40 to 140 degrees Fahrenheit. It is a useful feature, especially if you live in a cold area. As the name tells it is Eco Smart, it means it saves energy.

It also saves energy as it operates at 240 volts. Another feature which you will like in this unit is that it is made of stainless steel. The internal components are also made of pure copper. It increases the durability and efficiency of the unit. It is a compact unit, and also looks nice. Make sure that you purchase this water heater at Amazon. There you will get a bigger discount on the unit.
Overall it is an excellent choice for the entire household. It is an efficient water heater and saves money too. The fact that it has a lifetime warranty makes it the most obvious choice. The price of this tankless gas water heater is $438. The price may be a bit high, but it is packed with the features which you need the most at home.

Brand EcoSmart
Voltage 240 volt
Max Amperage 33
Water Connections 1/2″ CF
Dimensions 11.5″ x 8″ x 3.75″
Weight 16.8 pounds
Color N/A
Required Breaker 1 x 40 AMP
Shipping Free
Warranty Life-time
Customer Rating 4.3/5 By 615 Customers


Takagi Indoor Tankless Water Heater

Among many other brands of water heaters is the Takagi Indoor Tankless Water Heater. It is a large sized heater which utilizes natural gas to heat the water. The natural gas is what makes it a better choice. The design of this unit is good. It is available in white color which makes it attractive and better for wall-mounting.Takagi-T-KJr2-IN-NG

Pros & features:

  • Excellent flow rate i.e. 6.6 gallons per minute
  • 140,000 BTUs
  • Constant temperature monitoring with thermistors
  • Saves energy
  • Stainless steel body make sit durable
  • Has energy star certification
  • 10-year warranty.


  • The installation requires a certified technician
  • You get the warranty only when it is fitted by a certified technician.
  • No digital display

This Japanese made Takagi Indoor Tankless Water Heater is a good choice for home use. It heats up to 6.6 gallons of water per minute at your desired level of temperature. This is what makes it a brilliant choice. You do not have to worry about the number of people at home. With the fast flow rate, it will pump hot water to the entire house. With the 140,000 BTUs, it is an extremely powerful device.

The Takagi Indoor Tankless Water Heater is one of the sturdiest models on the market. It has a category-3 stainless steel body. The 4-inch steel ensures that you get a reliable product.
What you will like about this model is the technology used to heat the water and maintain it. The in and out thermistors control the water temperature. It is a good choice for residential use.

The device is also rated as frustration-free. It means that once you install it, you can leave it. It will work automatically to heat the water. As it works on the gas, you will have to turn on the unit and ignite the flame. Once it is turned on you can adjust the temperature easily.
One of the features which you will like about his mode is that it includes a frost guard for cold temperatures. Automatic mechanism of the heater ensures that it will turn off when the unit overheats. It prevents damage and also saves money, thanks to the automatic mechanism.

The price of the Takagi Indoor Tankless Water Heater at Amazon is $539.99. The price of this heater is quite high as compared to other models. But the technology in it ensures that you will get the constant supply of hot water for the house.

Brand Takagi
Voltage 208/240 volt
Water Capacity 6.6 GPM
Origin Japan
Dimensions 6.7 x 13.8 x 20.3 inches
Weight 37 pounds
Color N/A
Gas Rate 140,000 BTU
Shipping Free
Warranty 10 Year
Customer Rating 4.6/5 By 170 Customers


Rinnai Natural Gas Tankless Water Heater

Are you tired of getting up in the morning and having no hot water to take a bath? Well, it is the time that you go the best tankless water heater at your home. There are many models available on the market, but one of the best that we found is the Rinnai Natural Gas Tankless Water Heater.
It is one of the most expensive models of tankless water heaters on the market. But it has some of the best features which are not present in many other models of tankless water heaters. If you want a highly recommended water heater regardless of price, then we recommend that you purchase this model.Rinnai-RL75iN-Natural-Gas-Tankless-Water-Heater

Pros & features:

  • Import quality
  • Error code indicator
  • Digital controller
  • Thermal efficiency up to 82%
  • Excellent design and easy to use
  • 12-year warranty
  • Certified energy star product


  • High price

We recommend the Rinnai Natural Gas Tankless Water Heater because you can now power various appliances with this. Now you can have the hot water supplied to the bathroom, kitchen, and many other appliances at once.

One of the best things that you will love about this heater is that it is thermally efficient. It provides up to 83% thermal energy savings. It means that you will save a lot of gas energy bills. The water heater uses the state of the art gas heating technology.
There are not many models which provide error code indication. Often you may find difficult to know what is wrong with the unit. Thanks to the error indication mechanism, now you can know what exactly the problem is. The digital controller allows easy management of the water temperature. It is the latest MC-91-1US Digital Controller.

The design of this model is also excellent. The inlet is at the top and the outlet at the bottom. You can easily install the unit yourself.

With this water tankless heater, you can set the residential temperature from 98 to 140 degrees Fahrenheit and the commercial temperature settings which range from 98 to 160 degrees Fahrenheit.
With this unit, you can get an average of 7.5 gallons per minute. It is the best choice if you need large quantities of hot water for the entire household. You may have to pay a large sum of money, but you will get the peace of mind. This Rinnai Natural Gas Tankless Water Heater has a 12-year warranty. The price of this unit is $939 at Amazon. It is one of the highly recommended tankless water heaters on the market.

Brand Rinnai
Voltage 208/240 volt
Size  Large
Water Capacity 7.5gpm
Dimensions 14 x 9.3 x 23 inches
Weight 50 pounds
Color Silver
Gas Rate 180,000 Btu
Shipping Free
Warranty 12 Year
Customer Rating 4.2/5 By 87 Customers


What is a Tank-less water heater?

There are many types of water heaters; one of them is a tankless water heater which heats the water without any storage. There is no storage tank to store water. The water directly comes into the heater and the heating mechanism heats it as it passes out. It is a good choice if you are looking for a constant and a continuous supply of heated water. The cold water travels through the pipe into the unit which heats it.

There are many brands of the tank-less heaters. You can buy these heaters online. But it may be difficult to choose one. To make it easy we have reviewed the top five tank-less water heaters. These are the best brands on the market.


What is the use of the Tankless water heater?

The best tankless water heater will provide you continuous supply of hot water. As compared to the tank water heater which takes the time to heat the water. The tankless water heater has a useful mechanism which heats the water on the go. It uses the state of the art technology to heat the water instantly. Now you will not have to worry about getting cold water when the tank finishes.

How should you choose the Tankless water heater?

When you search the web you will find a lot of tankless water heaters. These are various models which have different features. However, you will find it difficult to purchase when given a lot of choices. Each of the water heaters that you find on the market has a few features which are better than the other model. You should know this to make a better buying decision. There are a few factors which you should know about. These factors will allow you to make a better buying decision.

The size of the water heater

There are many models available with a different size. Always buy the tankless water heater based on size. The size matters when the placement of the heater is in various parts of the home. For example, if you want a unit in the kitchen you may want to consider purchasing a smaller unit with less capacity. But if you want a unit that you need in a bathroom for a shower, then you may want a model with the larger size. The size of the water heater also makes it easy t install. The large sized heaters need a plumber to fix and install, a small unit, however, is easy to install and you can do it yourself.

The water flow rate

The flow of water is an important consideration. There are many models which have a less flow rate as compared to other models. We have reviewed the top five models and also mentioned the water flow rate of each model. Now you can choose the desired tankless water heater easily. You will want a water heater with an increased flow rate if you want it for bathroom use. You may go for a low flow rate if you are installing it in the kitchen. The gas tankless water heater has more flow rate as compared to the electric tankless water heater. So, it is always better to choose the gas powered tankless water heaters.

Heating time

Another important consideration is how long it takes to heat the water. Usually, the tankless water best-water-heaterheaters do not take time, but there is a slight difference based on the type of heaters. The gas tank-less water heaters take less time to heat the water as compared to electric water heaters.

The warranty

Warranty plays an important part in buying the unit. Make sure that you get as much warranty as possible. These heaters mostly have a three-year warranty, but it will be good if you got a model that has a lifetime warranty on parts. We have mentioned the warranty provided by the manufacturer in our reviews making it easy to buy if you want a unit based on a warranty.

The Controls

The tankless heater should be easy to use. Make sure that you purchase a model that has digital controls. The digital controls are not only easy but also accurate. These units may be a bit expensive but will provide you peace of mind. You only have to press the button to start or stop the unit or adjust the temperature.

The Price

The price is also an important factor to consider while buying a water heater. If you are looking for a cheaper model then purchase the gas-powered tankless water heater. These heaters are at least 15 to 20 percent cheaper than the electric heaters. So, if you want to save money then our recommendation is to buy the best tankless gas water heater. On average the price of these water heaters ranges from $200 to $1000. The high cost means that the heater will have more features and better controls.

The Type of heater

The most important consideration is the type of heater. There are two types of tankless heaters based on the mechanism used to heat the water. There are gas and electric water heaters. The gas heaters are a much better choice but the electric heaters provide better controls. It is up to you to make a choice. You can read our reviews in which we detail every aspect of the tankless water heaters. We have reviewed both the gas and electric tankless water heaters.

A number of appliances you can attach with the unit?

Last but not the least is the number of appliances you can attach with the water heater. There are a few heaters which only power one room i.e. bathroom or a kitchen. There are a few models which can provide hot water to the entire building. Always choose the type of tankless water heater based on your needs. Read the best tankless water heater reviews to make a better decision.


How does a Tankless Water heater work?

It is important that you know the working of the tankless water heaters. Only then you can know the benefits of these water heaters as compared to other types of water heaters. Here is the basic working of the tank-less water heater.

• When you turn on the unit the water enters the heater through the pipe. The pipe may be at the top or at the bottom depending on the model. When the water enters the pipe the mechanism in the heater signals to activate the flame (in the case of gas heaters) or start ignition.

• To keep the flame ignited there is a fan inside the unit which pumps oxygen to the burner. Until the flame is at the desired level the igniter will keep igniting the flame. It will only stop when the flame is adequate.

• The water heating mechanism involves copper wires. The copper coils are present in the copper heat ex-changer. The water passes through the inlet pipe and then over the wires where it is heated. Then it passes through and to the outlet pipe.

• There are many models in which the water is also preheated before entering the heating chamber. It means these models have two chambers or heat ex changer’s. These models provide hotter water.

• The blower and the gas valve work together to adjust the gas (fuel) & oxygen. If you ask for more heat the flame will be increased by increasing the gas and oxygen. These controllers work together and activate in a matter of seconds. You will get instant heat and hot water of your desired temperature.

These tankless water heaters have a digital controller through which you can control the temperature.
This is how the entire unit works. Make sure that the water heater you get is reliable. To ensure that you get the best, read the tankless water heater reviews.

Choose best Tankless Water heater

It is important to get the efficient and the most reliable tankless water heater. There are dozens of models available at Amazon. To do that you will need some information. You need to have proper information about these water heaters. It is why when you read the reviews you will come to know that we provide authentic information about these heaters. This information will provide helpful in making the buying decision. Each water heater has a different mechanism, different capacity, and efficiency level. Each of these tank-less water heaters that we review is unique. You will find that these reviews are the most informative reviews available online.

You will find detail about the models that we review. You will find information in our reviews such as specification, price, features, benefits, etc. You can rely on our reviews.

Types of Tankless Water heaters

There are two major types of tankless water heaters.

The gas tankless water heaters
The gas heaters have a mechanism in which they make use of the gas to heat the incoming water. The gas and oxygen are used to create a flame which heats the copper coils in the exchanger. When the water passes through these coils in the heat exchanger it gets heated.

The electric tankless water heaters
In this model, the water is heated using electricity. The heating chamber Exchanger has the coils which are heated by passing the electricity. The water passes through the exchanger and is heated and then passed out.
Available features of Best Tankless Water heaters
These are the features which you must consider before buying a tankless water heater.

The Brand
Make sure that you only purchase the water heaters from the reliable brands. Buy the best tankless gas water heater and the best tankless electric water heater from reliable brands. You will find that we have reviewed only the best brands available in the market.

The controls
Only buy the tankless water heater which has easy to use controls. Complex settings and controls can take a lot of time to adjust. Always choose the heaters with simple settings.

The Technology
There are both gas and electric heaters available. Consider the option which suits you the best. If you live in an area where there is no gas then choose electric heaters. Gas heaters are better where there is a severe cold.

How to buy a Tankless Water heater from Amazon?

Buying the best tankless hot water heater from Amazon is easy. You just need to put in the name of the brand or just type “tankless water heater.” It will give you dozens of search results. You can easily buy one of these by placing an order. But before you make the purchase, it is better to read the review of that model. The reviews will give you a better insight on the heaters.
At Amazon, you can search the heater by name, by type, by the manufacturer name. You can also filter research results by the price. Overall the buying process is easy. There are many sellers which also ship for free. So you do not have to worry about extra charges.

Final Thoughts:

At the end, we would like to give our verdict on the tankless water heaters. Both the types of heaters i.e. the tankless gas water heater and the tankless electric water heater are an excellent choice. Instead of purchasing high-cost tank heaters you should go with the latest technology. It is also better to buy these heaters as these heaters will provide you more efficient and a constant supply of hot water. These heaters work instantly when you turn them on and do not take time as compared to the tank heaters. The water tank always takes some time to heat up to supply the hot water. Whereas, these tankless water heaters have better technology which heats the water as it passes in and out of the unit.

You will not get any better water heater than these. Also, we have reviewed the top five tankless water heaters. Now you can choose one of the best tankless water heater from these five. These heaters work using advanced technology. You do not have to worry about paying a lot of money too. These are affordable heaters as compared to many other brands. The tankless water heaters use either gas or electricity to heat the water. If you want to save money then choose the gas heaters.

You can read our reviews. These reviews will provide you an in-depth knowledge about these models and why these are beneficial. Read the above article to find out the top five brands of tankless water heaters.

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