Best Electric Tankless Water Heaters – Reviews & Buyer’s Guide

Last Updated on February 27, 2021 | by Camila Jenkins

The tankless water heaters usually run on electricity, and for your home, it is undoubtedly the best and affordable ones. It can drop down your electricity bills and provide you with hot water continuously without a tank.

Those conventional water heaters are really a huge investment and require much space as well. On the other hand, the best tankless electric water heaters are compact in size and truly a good investment along with the continuous flow of hot water.

Therefore, if you want to save your resources and require an efficient water heater, then go for these electric tankless water heaters without a second thought. These types of water heaters can go well with any of your applications.

5 Best Electric Tankless Water Heaters Review

Here in this review or guide, we have researched a lot to assist you in finding the perfect one for your home. And the research comprises of quality, features, advantages and their functionality. So go through the tankless electric water heaters reviews and find the best one for your home effortlessly.

1. EcoSmart ECO 27 Electric Tankless Water Heater

EcoSmart is known as one of the best producers of electric tankless water heater in the world. The company is instrumental in making eco-friendly and quality energy products.

The EcoSmart ECO 27 comprises three 9KW heaters for the continuous supply of hot water. This model is an economic version of EcoSmart EC) 36. If you have on a tight budget and you a minimal requirement of hot water, then EcoSmart ECO 27 is the perfect one for you.

It comes with a digital display along with an adjustable temperature range of 80 degrees F to 140 degrees F. The size of this tankless water heater is quite compact and can be used for two showers at the same time. It runs on 27 KW, 240 Volts and a current of 112.5 amps along with three numbers of 40 amp breakers.

The self-modulating technology of this electric tankless water heater offers a great efficiency as well as great saving of electricity. It is furnished with the stainless steel and copper heating elements and quite solid inbuilt.

EcoSmart EC 27 has a 99.8% energy efficiency rating, through which you can save at least fifty percent of water heating cost. This electric tankless water heater goes well in warm and cold environments. This powerful and efficient water heater has the capability to provide hot water in the coldest climates.


  • Sturdy and effective,
  • Easy replacement
  • Easy to install
  • Value for money
  • Glossy and compact


  • Irritating warranty clauses

2. Rheem RTEX-13 Electric Tankless Water Heater

RHEEM is one of the front-leading manufacturers in the hot water industry and provides some of the best commercial and domestic electric tankless water heaters.

The RTEX-13 is the upper version of Rheem RTE 13. It is quite compact in size and simply perfect for apartment buildings. With an energy efficiency of 99.8 percentage, it has the capacity to provide continuous hot water as per your requirement.

This tankless electric water heater comes with an external digital thermostat along with an LED display. You can check the temperature through the LED display and control the temperature as per your wish within the range of 80 degrees F to 140 degrees F.

Rheem RTEX-13 has a capacity of offering water up to 4 Gallon per minute, so it is quite good for a shower and kitchen sink at a time. It operates through 240 Volts, current of 54 amps by means of a 60 amp breaker.

Rheem RTEX-13 is the smallest electric tankless water heater in terms of design, you can put it in your hand as well due to its compactness. This water heater is quite lightweight with a weight of 8.5 pounds. It comes with a simple installation process and saves much of space.

This electric tankless water heater comes with a self-modulating control and it is quite efficient in cutting down your electricity bill.


  • Affordable price
  • Quite compact and perfect for minimal space
  • An extraordinary design
  • Provides the user the maximum control
  • Solid heating elements
  • Simple installment process
  • Easy replacement feature


  • Not suitable for multiple showers

3. Bosch Tronic 3000T Electric Tankless Water Heater

The Bosch Tronic 3000T is one of the best electric tankless water heaters for residential and commercial uses. This point-of-use tankless water heater offers you hot water on demand.

This tankless water heater from Bosch comes in four models such as 3.4 kW, 7.2 kW, 9.5 kW, and 12 kW. These water heaters house an efficiency rate of 98 percent. It offers a hot water flow rate of 1.8 gallons per minute. The temperature ranges from 45 degrees F to 75 degrees F.

It saves your electricity during the standby mode, and you can place this tankless water heater horizontally as well as vertically as per the available space in your home.

Bosch Tronic 3000T electric tankless water heater supports three facets at a time and provides water in the set temperature. This water heater comes with three compact sizes. You can install this water heater on the floor or place it on the wall as well as per your suitability.

The glass-lined tank of this water heater comes with solidness, and it is one of the most energy-efficient tankless water heaters in the market due to the less energy consumption feature. It also works fine in the extremely cold climates and provides hot water instantly.

It offers a one year warranty of the product and 5 years of warranty on the heating element.


  • Compact in size and suitable for small spaces
  • Maintenance-free
  • Long-lasting
  • Sleek design
  • Affordable price tag
  • Good for less energy consumption


  • Limited to supply hot water to one sink only at a time

The lower power heaters are not quite suitable for the showers

4. SIO Green IR30 POU Electric Tankless Water Heater

SIO Green IR30 POU is loaded with all those cutting-edge specifications and feature to suit your necessities. The most distinguished feature of this electric tankless water heater is that it can offer, you the hot water as well as clean it simultaneously. So if you are in need of this, then just opt for this water heater. It takes care of the hygienic part as well.

This on-demand electric water heater is quite perfect for the cold environment with a temperature range of 57 degrees F. It uses infrared technology as well as coil-less technology. Though which it heats the water with the infrared quartz without any metal touching the water. And this is also another exceptional feature by a tankless water heater in this category. So your hot water is completely free from the hint of metal coils.

It is also free from corrosion, and free from all those bacteria and algae due to the presence of infrared technology. Sio Green IR30 POU provide you clean and bacteria free hot water on demand.

This point-to-use water heater operates through a 110 Volt and requires 30 amps current with a power of 3.4 kW to heat the water swiftly.


  • Quite perfect for hard water areas
  • Free from corrosion.
  • Free from the deposition
  • Maintenance-free
  • Consumes less electricity


  • Leakage issues

5. Stiebel Eltron Tempra Plus 29 Electric Tankless water Heater

Stiebel Eltron Tempra Plus 29 is a high quality electric tankless water heater. Stiebel offers some of the best and powerful water heaters. This tankless water is a good option for large families as well as in commercial applications.

This water heater furnishes a digital temperature display. There is a trouble-free knob to control the temperature in the range of 86 degree F to 140 degrees F. The maximum flow of this water heater is a 8 Gallon per minute.

The Stiebel Eltron Tempra Plus 29 comes with advanced flow control, in which you can control the flow when you don’t have any sort of hot water requirement. It also assists you in saving energy.

The advanced flow control works as an ECO mode in Stiebel Eltron Tempra Plus 29. A single unit can provide water to a shower, a sink and to a washing machine at a time.

The maximum flow depends completely on the temperature of the heater. It runs through 240 Volts and a current of 100 amps via two 50 amp electric breakers. The Stiebel Eltron Tempra comes with 7 years of leakage warranty and for its parts, it provides 3 years of warranty.


  • Noiseless operation
  • Quite compact in size
  • Advanced flow control offers constant output temperature
  • The auto-modulating unit is quite efficient in energy saving


  • Expensive as compared to the other heaters

A buying Guide of An Electric Tankless Water Heater

Buying the best electric water heater is truly a complicated task for everyone due to the availability of hundreds of water heaters. To obtain the best one you have to be extra careful and cautious.

How To Choose The Electric Tankless Water Heater?

Get the insight about the most crucial features with this complete buying guide on best tankless electric water heaters. Let’s have an idea about the crucial factors which you have to consider before buying the best water heater.

Hot Water Requirement

You do require a tankless electric water heater for your home to get the hot water for your everyday need. So calculate the exact amount of water you do use normally. The hot water requirement also depends on the members of your family. So after considering all these factors only go for the best one that completes your need.

Energy Efficiency

When it comes to buying an electric tankless water heater, then consider energy efficiency as a prime aspect. These tankless electric water heaters are much efficient regardless of your household size. While considering the energy efficiency you have to watch out for its efficiency factor (EF). A good electric water heater must have an EF rating of 0.92 to 0.96. So check the EF factor cautiously so that you can get an energy efficiency of 92 to 96 percentage.

Your Home Location (Temperature)

An electric water heater works well in the range of 30F. This is the most standard range in any location. But if you need something more than that then choose the type of electric water heater that is quite capable of a higher temperature rise. For most of the countries in the US an electric water heater is quite suitable for spring and summer time. So while buying an electric water heater for your home first of all access your location and the type of environment you are living in.


Cost is another crucial aspect, that you have to take into account while buying an electric water heater for your home. there are hundreds of brands in the market in terms of the electric water heater, so it is quite easy to get the one for yourself as per your budget. So while buying first calculate your budget and make a research on your requirement, then go for the buying process. But keep this in mind that don’t ever compromise on the quality of the heater while looking at your wallet.

Flow Rate Needs

The flow rate is an important factor while choosing the best unit for your home. It is true that the higher the flow rate, the higher the price tag of an electric heater. Still, you have to focus on the flow rate need as different faucets in your home will need a different amount of water along with the flow rate.


The electric tankless water heaters come in different sizes, therefore you have to select the one that suits your space and requirement. Consider the place where you want to put your water heater. Then only choose the best one by accessing its features and functionalities. Choose the compact ones you have a small available space.

Why Choose Electricity Over Gas Tankless Water Heaters?

A gas-based water heater heats the water by burning a fuel and use natural gas, whereas an electric water heater heats the water by using an electric resistance coil. Those gas-based water heaters are less energy efficient as well as compared to the electric heaters.

In a gas-based heater you have to vent the gas, which is quite dangerous, whereas those electric ones are completely free from this aspect. The electric water heaters are a little bit expensive as compared to the gas-based water heaters but more efficient and effective.

On the other hand, a gas-based water heater is not suitable for utmost cold environments, but most of the electric water heaters work well in harsh conditions. Due to the absence of combustion, an electric water heater is more reliable than a gas-based water heater.

To use an electric water heater you don’t have to set up a ventilation system and go for all that gas piping arrangement.

The recovery rate of a gas-based water heater is much faster than an electric water heater. It has the ability to heat 50 Gallons of water within an hour time. But due to the high efficiency and energy saving feature, those electric water heaters stands firm in the comparison.

How An Electric Tankless Water Heater Works?

The working of an electric tankless water heater is quite simple. It heats the water on demand and as per your requirement. It doesn’t store the hot water in the tank. With this, it minimizes the water heating cost and saves your energy as well. This is an environmentally fit water heater.

These types of water heaters are much powerful and in demand in the domestic as well as commercial applications. Here usually a flow sensor identifies the requirement whenever you turn on the faucet and triggers the tankless water heater. Then the heating elements start to heat the water can provide hot water until the close command.

Due to the minimal operation, it minimizes the energy cost up to 30 to 50 percentage in general. In this type of water heater, you don’t have to overheat the remaining water. It is free from the inbuilt tank as well. And for this reason, this water heater also reduces the hard water scale formation. And there is no sign of mineral and sediment build up as well.

The tankless electric water heaters also are known as demand-type water heater as well as instantaneous water heaters. It provides hot water during the nee only. These heaters are also free from the standby energy losses like the storage water heaters. With this feature, it is quite good to save your money as well as electricity consumptions.

Benefits of An Electric Tankless Water Heater

The tankless electric water heaters are a little bit expensive as compared to the gas-based water heaters. But because of its superlative benefits, you can choose this type of water heaters without any second thought. Let’s go through the benefits of an electric tankless water heater.

  • Higher Efficiency

The tankless or demand-type water heaters are much more efficient than the storage type water heaters. For smaller families or individuals, then the efficiency rate is around 24 to 34 percentage, whereas in a bigger family it has a remarkable efficiency of 8 to 14 percentage.

  • Water Usage Demands

These types of water heaters fulfill the hot water demand swiftly because of its higher flow rate. But always keep this in your mind that the flow rate of your electric tankless water heater relies on the type of heater and the environment.

  • Enduring

An electric tankless water heater comes with an enduring feature. It lasts longer than the storage water heaters as well as gas-based water heaters. The expected life of these water heaters is almost up to 20 years.

  • Minimal Heat Loss

The tankless water heaters are free from the heat loss feature. Here there is not any provision of standby water. So you don’t have to think about the heat loss at all.

  • Operational Cost

The energy cost of an electric water heater is relatively lesser than a gas-based water heater. The gas cost is somehow expensive than electricity.

  • Compactness

Electric tankless water heaters are quite compact in size. You can install them in the small spaces, which is not possible for a gas-based water heater. Usually, a tankless electric water heater takes one-third of the space that is required by the tankless gas water heaters.

  • Minimum Maintenance Cost

Handling a tankless electric water heater is quite easier than the other water heaters. Many of the models come with zero maintenance feature. In the worst case, you have to clean the inlet screen filter only. So it is just easy-to-use a tankless electric water heater.

  • Energy Source

These tankless electric water heaters run on electricity, and it is available in every home. So it is quite easy to install an electric water heater and take its benefits.

  • Goes Well With Hard Water

These types of water heaters are quite good for handling the hard water. And there is no sign of sediments, due to the absence of storage feature.

Wrapping Up

The tankless electric water heaters are in the demand now due to their efficiency, compactness, and hundreds of benefits. These types of water heaters are much effective and useful as compared to the storage type water heaters as well as gas-based water heaters. It is quite good to install an electric tankless water heater in your home. But before finalizing the best one go through its features and functionalities and have a good idea of the product.

We wish this guide would give all of you a proper insight on the best electric tankless water heaters, and help you in finding the best one for your home. If you have any queries or find this guide quite useful then you can pen down the same on the comment box. We do appreciate your valuable comments.

Best Electric Tankless Water Heaters Review

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