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Best Electric Tankless Water Heater Reviews

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Electric tankless water heaters are not only reliable and efficient, but they also save space. If you are out for one, here the some of the best electric tankless water heater reviews.

Note that the products discussed on our site are independently selected by (obsessive) editors. Your purchases through our recommendations may earn us a commission at no extra cost to you.

The popularity of electric tankless water heaters has increased drastically over the last couple of years. They are not only reliable and efficient, but they also save space. Unlike conventional water heating techniques that heat water then store it in the metal tank until when it is needed, electrical tankless water heaters only heat water the moment you need it, allowing you to save energy.

However, with so many brands on the market, it is easy to get confused about which heater to buy. If that is the case, then count yourself lucky because today you have landed in the right place. Below, we have conducted extensive research on your behalf and compiled a list of the best electric tankless water heaters.

Also read: Best Electric Garage Heaters

Electric Tankless Water Heater Reviews

  1. Ecosmart ECO 18 Electric Tankless Water Heater

Highlights:
  • Self-regulating technology allows higher heating efficiency
  • It saves up to 60% of your water heating cost
  • Made of copper and stainless materials that are durable
  • It is easy to install and use
  • Its ECOSMART feature means that you to never run out of water
  • It saves pace, thanks to its sleek and compact design
  • It is stylish and can be installed anywhere
  • It allows you to adjust the temperature
  • Lifetime warranty
Buy on Amazon

Last update on 2019-12-14 / Affiliate links / Images from Amazon Product Advertising API

If you are looking for a sturdy and durable tankless water heater, then Ecosmart 18 tankless water heater will not disappoint you. It has a 99.8% energy efficiency rating, and it can help you save up to 60% of your water heating cost. It uses the latest and most advanced self-moderating technology that enables it to operate smoothly efficiently. It is also easy to install. All that you need to do is follow a few simple and straightforward instructions provided.

If you choose Ecosmart 18 tankless water heater, then you can be sure that will never run out of hot water. All that you need to do is the size it correctly, and it will provide an endless supply of water on demand.

The Ecosmart 18 is one of the few tankless water heaters that heat two showers and two sinks at the same time in a warm climate and a sink and shower during the cold season. It features a digital temperature control that allows you to set your preferred temperature, anywhere from 80 degrees F to 140 degrees F.

In addition to being energy efficient, Ecosmart 18 tankless water heater is also stylish, compact and durable. This device will not look odd when you install it on your property as is it usually the case with other similar devices. It also works perfectly for both clod and warm climates. In fact, in a warm environment, Ecosmart 18 can deliver up to 6.0 GPM or more which is sufficient to heat two sinks and two showers simultaneously.

  1. Stiebel Eltron Tempra Plus 29 KW Water Heater

Highlights:
  • It auto modulation feature helps to save energy
  • Features an advanced flow control that helps to keep the temperature constant even when demand is high
  • Digital temperature display
  • You never run out water
  • Copper heating chambers provide a consistent flow of hot water
Buy on Amazon

Last update on 2019-12-14 / Affiliate links / Images from Amazon Product Advertising API

This is arguably one of the most technologically advanced tankless water heaters on the market today. Made in Germany, Stiebel Eltron Tempra tankless water heater has many amazing features that make it stand out from the rest. For instance, it features an intelligent self-modulating technology that ensures only the least amount of energy issued. On the other hand, its advanced flow control ensures that you shower always stay hot.

Stiebel Eltron Tempra tankless water heater is ideal for people who want to save space and money. Its small and compact design enables it to consume the list space possible. It also 99% energy efficient and can save up to 50% of your water heating cost. The heating chamber is made of solid copper that helps to minimize heat loss. If the demand for hot water is high, the advanced flow control system that it features automatically control the flow of water to maintain a consistent temperature. This tankless water heater is very easy to install and can be installed anywhere.

  1. Rheem RTEX-13 Residential Tankless Water Heater

Highlights:
  • Durable copper immersion for maximum heat efficiency
  • 99.8% energy efficient
  • It is easy to install
  • Features an external adjustable thermostatic control plus an LED display
  • The system is threaded, meaning that installation and parts replacement is easy
  • Self-modulation power control
  • It is field serviceable
Buy on Amazon

Last update on 2019-12-14 / Affiliate links / Images from Amazon Product Advertising API

Made by Rheem manufacturing company that has been in existence for nearly 100 years, Rheem residential tankless water heater is currently among the bestselling electric water heaters on the market. The reason why behind its success in a very competitive market is its remarkable features. This device features a digital thermostatic display with outstanding accuracy. It also features durable copper heating elements that help to limit heat loss.

Rheem residential tankless water heater is 99.8% energy efficient and can cut your water heating bill by up to 50%. The self-modulation temperature control ensures that the devices use the least possible energy. Additionally, Rheem residential tankless water heater is field serviceable, meaning that you don’t have to uninstall it just in case it experiences a technical hitch. The installation process is also easy and straightforward. The device comes with everything that you need for installation including, the compression water connection, NPT adapters and electric cables.

  1. Rheem RTEX-18 Residential Tankless Water Heater

Highlights:
  • Two heating elements
  • Up to 4.4 GPM flow rate
  • Easy to install (comes with all accessories)
  • Advanced self-modulation
  • Field serviceable
  • Digital temperature display
  • It is threated for easy installation and replacement
Buy on Amazon

Last update on 2019-12-14 / Affiliate links / Images from Amazon Product Advertising API

Rheem RTEX 18 residential tankless water heater is another fantastic product from one of the world’s most renowned producer of heating, cooling and water heating products. What made this unit easily take a spot in our electric tankless water heater reviews is the fact that it operates very silently. Apart from that, the RTEX 18 model features an external digital thermostatic with outstanding degree accuracy (+/1).

This electric water heater device is also equipped with one of the technologically advanced self-modulation systems that adjust power based on demand. For instance, when the need for water is high, the device automatically raises temperatures to ensure consistency in water temperatures. On the other hand, when the demand lower. It lowers temperatures to save energy.

It also features two durable copper immersion heating elements that heat water with minimal heat loss. The system is threated, making installation and replacement of parts easy. The installation process is also easy, and it comes with all necessary accessories, including a ¾ inch NPT water connection. Rheem RTEX 18 residential tankless water heater has impressive flow rate of up to 4.4 GPM, which can heat two showers simultaneously.

  1. Eemax EEM24018 Tankless Water Heater

Highlights:
  • It provides instant and consistent hot water
  • Provides an endless supply of water
  • It is equipped with advanced and self-modulating technology
  • Its compact size enables it to save space
  • It is stylish and can be installed anywhere
  • It is easy to install
Buy on Amazon

Last update on 2019-12-14 / Affiliate links / Images from Amazon Product Advertising API

Eemax is one of the best manufacturers of heating and cooling products in the world. They have consistently produced quality products, and once again, they did not disappoint when they launched Eemax EEM24018. This tankless electric water heater is capable of fulfilling your water needs, regardless of your demand for hot water. It is ideal for residential and mid-sized businesses.

Eemax EEM24018 is equipped with one of the most advanced self-modulating technology that adjusts the temperature automatically based on the amount of hot water needed. This is important because it enables you to save energy. With a 99.8% energy efficiency, this device can cut your water heating bill buy up to 50%. It also features a temperature control system that increases temperature in increments of 1 degrees F, between 80 degrees F and 140 degrees F. This tankless water heater can produce water for up to two sinks and one shower at the same time in colder climates and up to 4 sinks or showers in a warmer climate.

Another good thing about Eemax EEM24018 is that it never runs out of water. Additionally, the device heats water instantly as it flows through its pipe, allowing you to enjoy hot water at your preferred temperature immediately.

  1. EcoSmart ECO 11 Electric Tankless Water Heater

Highlights:
  • Patented self-modulating technology
  • It’s sleek, and compact design enables to you save pace
  • It is easy to install
  • Lifetime warranty
  • Endless supply of water
Buy on Amazon

Last update on 2019-12-14 / Affiliate links / Images from Amazon Product Advertising API

Ecosmart Eco-11 is equipped with a patented self-modulating technology that controls power output to ensure optimum water heating. Ecosmart Eco-11 can heat to up to two gallons per minute, making it ideal for residential use. In warm climate Ecosmart Eco-11 heat two sinks and one shower simultaneously and two sinks and one shower in a colder climate.

If Ecosmart Eco-11 is sized correctly, it can provide you will consistently supply of hot water. Ecosmart Eco-11 come with a lifetime warranty when installed by a professional. It is 99.8% energy efficient and can save up to 60% of your water heating cost. While many electric tanks on the market are not suited for cold climates, the Ecosmart Eco-11 works perfectly well even when the temperature drops to as low as 37 degrees F.

  1. Stiebel Eltron Tempra 24 Plus Water Heater

Highlights:
  • Features an advanced flow patented German technology
  • Saves and energy saver
  • It is easy to operate
  • Comes with 3-year parts and 7-year leakage warranties
  • Auto modulation technology that helps to save energy
Buy on Amazon

Last update on 2019-12-14 / Affiliate links / Images from Amazon Product Advertising API

There is no doubt that Stiebel Eltron is one of the best manufacturers of electric tankless water heaters. The launch of Stiebel Eltron Tempra 24 plus once again showed why this company is among the best in the industry. This model is not only highly efficient, but it also durable. If installed by a professional, this tankless electric heater can serve you for many years to come, enabling you to save a lot of money.

Stiebel Eltron Tempra 24 plus is equipped with a digital temperature control system that allows you to set your desired temperature. It is also equipped with advanced flow control, a patented German technology that adjusts the temperature automatically for optimal water temperature. It lowers temperature when the water is too hot and increases when the water has not achieved the desired temperature.

Its sleek and compact design saves space but still provide an endless supply of hot water to meet your house needs. This tankless water heater does not require venting as it is the case with many other tanker water heaters. It auto modulation features enable it to save electricity cost. The system is noise-free and easy to operate. All that you need to do to operate is click buttons that are well labelled and strategically placed for easy access.

Things to Consider when Buying Electric Tankless Water Heaters

electric tankless water heater reviews

You have probably heard of people who bought electric tankless water heaters, but they ended up getting disappointed. The reason why many people get disappointed after buying an electrical water heater is because they don’t consider certain crucial factors. If you want to buy a quality heater that will suit your needs, then below are important factors to consider.

1. Consider warranty

This is a critical factor that most people usually overlook when buying an electric tankless water heater. Before you make your final decision, it is important to check if the eclectic tankless water heater comes with a warranty and whether the warranty is favourable. Most brands that offer warranty usually sell quality products because they know what is at stake. Different brands offer different warranties. For instance, some brands like Stiebel Eltron offers three years parts warranty and seven years leakage warranty. On the other hand, Ecosmart offers a lifetime warranty on all its units. In addition to checking if the water heater has a warranty, it is important to choose one that has a favourable warranty. These types of heaters are capital intensive. It is therefore important to choose one that has a reasonable warranty to protect you against losing money just in case it experiences technical hitches.

2. Consider ease of installation

Can you install an electric tankless water heater all by yourself, or does it require an expert to do the job? This is an important question that you need to ask before you buy this crucial device. The good thing about these kinds of heaters is that it does not require venting. However, that does not mean that the installation is simple. Some brands are complex to install, meaning that they require you to seek the services of an expert. Choosing such brands means that you need to factor in the cost of hiring a professional to do the job for you. On the other hand, some electric tankless water tank is easy to install and does not require you to seek the services of an expert. It is vital to choose a heater that is easy to install and comes with an easy to read and understand user manual.

3. Consider ease of maintenance

Just like any other machines, electric tankless water heaters needs to be maintained to operate smoothly. However, some brands require special care than others. If you don’t want to incur maintenance cost frequently, it is important to choose a brand that does not require regular maintenance. The best way to know if an electric tankless heater does not require maintenance is by reading customer reviews and testimonials. 

4. Consider the heaters unit water flow

Unit water flow refers to the amount of water flowing through the tankless heater. Electric tankless water heaters have varying water flow. There are some with large water flow, and there are some with small water flow. When considering unit water flow, it is important to consider your household water needs. If your demands of hot water are high, then it is important to choose a tankless water heater that has high water flow to satisfy your home’s needs. On the other hand, if you are living alone, then it is okay to choose an electric tank that provides hot water to a single faucet at a time.

5. Consider safety features

In addition to checking the tankless heater unit water flow, it is also important to consider its safety features. You don’t want to buy a tankless water heater that will end up causing more harm than good. Take your time to scrutinize the safety features that the tankless water heart has. Some recommended safety features that you need to look out for include self-modulating technology, temperature lock, and freezing protection, and so on.

6. Check if the tankless water heater is energy efficient

One of the main strengths of electric tankless water heaters over traditional water heaters is their ability to consume less energy. However, some tankless water heaters are more energy-efficient than others. Some units are rated 90% energy efficient while others are 99.8% energy efficient. Remember, tankless water heaters consume a substantial amount of power. So, choosing a unit that is energy efficient is very important. We recommend that you choose a unit that is at least 99% energy efficient. This way, you will lower your energy cost by up to 50%.

7. Consider the amount of space it consumes

This is a crucial factor to consider, especially if space is a big factor for you. Electric tankless heaters are designed differently. Some are sleeker and compact than others. So, if you are space-conscious, it is important to choose one that can be installed anywhere and does not consume plenty of space.

8. Consider price

The reason why this is our last point is that the price should be the last factor to consider. The price of an electric water tank does automatically determines its quality. However, you cannot run way from the fact that you can only buy a water heater that you can afford. Come up with a budget then choose a quality heater that suits your budget. Also, choose a unit that you can afford to maintain.

9. Check customer reviews

As an additional piece of advice, you can check online for electric tankless water heater reviews before you decide on a unit. You can for example check Amazon customer reviews to be sure of a products quality. They always say, it’s better to be safe than sorry. And that’s true indeed especially when buying a product that costs more than 300-400 USD on average.

Why Install Electric Tankless Water Heaters, Are They Worth It?

water heater

If you are thinking about switching to an electric tankless water heater, then one question that you must be asking yourself is; is it worth it? The answer is YES, it is worth it and below are reasons why.

1. They are energy efficient

Most electric tankless water heaters can lower your energy cost by up to 60%. If you tired of incurring huge monthly energy bill, then buying this unit is a wise idea.

2. They are environment-friendly

Electric tankless water is eco-friendly meaning that they don’t emit greenhouse gases. You will play a significant role in conserving the environment if you buy this unit.

3. They reduce water wastage and damage

Traditional water tanks usually wear out with time, causing water wastage through leaks and bust. A tank burst can also cause injury and damage to property. Switching to an electric tankless water heater will help to reduce the risk of water damage

4. They save space

Most electric tankless water heaters come with a sleek and compact design. Installing it in your house can help save valuable space.

How to Know What Size Electric Tankless Water Heater You Need

heating water

Tankless water heaters are limited when it comes to how much water they can hold at any given time. It is therefore essential to choose a size that suits your household needs. If you select one that is too small, then it won’t provide enough water to meet your household needs. On the other hand, if you choose one that has a large holding capacity, then you will underutilize the unit. Proper sizing is, therefore, critical. Below are tips on how to know the size of the electric tankless water heater you need.

Consider your needs

One of the best way to know what size of the electric tankless heater you need is by determining your household needs. For instance, if you have a large family, then it means that you will need more hot water. As a result, you need to buy a large-sized unit that provides more hot water at a given time.

Consider groundwater temperature

The groundwater temperature should also determine the size of electric tankless water heater to buy. If you live in an area where water temperature gets as low as 37 degrees F, then you need to buy a large-sized unit because more energy is required to heat the water.

On the other hand, if you live in a warmer region, then you can buy a smaller sized tankless water heater because less energy is needed to warm the water. If you live in areas such as Alaska, North Dakota and Wisconsin where the temperature goes as low as 37 degrees F, then you need to buy a large-sized unit. On the other hand, if you live in warmer areas such as southern Florida where the temperature reaches as high as 77degree F, then it is okay to buy a small-sized unit.

Determine your mounting space

Choose a heater that can fit into your mounting area. If you live in a small house with limited space, then you should consider buying a smaller sized unit. On the other hand, if you live in a big house with plenty of places, then it is okay to buy a big size heating unit that can meet the demand of the house.

How to Install Electric Tankless Water Heaters

install tankless water heater

Installing electric tankless water heater may seem like a complicated task, but in reality, it is not. Most major brands have made the installation process of their unit simple and straightforward. Below is a step by step process of how to install an electric tankless water heater in your home.

1. Read manufacturer instructions

The best electric tankless water heaters will always have a instructions manual in the box. Before you start the installation process, it is necessary first to read the manufacturer guideline to know what you need to do to install this water heating unit. The installation process usually varies depending on the brand that you buy. For instance, some models can only be installed indoors while other models allow both indoor and outdoor installation.

2. Choose the area to mount the heater

Once you have read the manufacturer instructions, the next step is choosing where to install the heater. Although you are free to install it at any place of your choice, the expert recommends that you mount it close to the main power panel. It should also be close to the water source to lessen the amount that you will have to wait before you hot water reaches you. If you choose to install it outdoor, then ensure that it is enclosed to avoid damage by harsh weather. Use screws and anchors provided in the package to mount the unit on the wall.

3. Turn off the power and main water supply

Before you start the installation process, it is essential first to turn off the power and central water supply. This will not help to prevent accidents but will also make the installation process easy for you.

4. Connect the water pipe

Once the unit is well mounted, the next step is connecting the water pipe to the unit. Use the accessories provided by the manufacturer to connect the water pipe to the tankless water heater. Check to see if connected lightly to avoid leakage. It is recommended that you aloe install a shut-off valve on the pipe before you fix it on the unit to make it easy to cut off the water supply when performing regular maintenance. It is also wise to install a pressure reduction valve to prevent excess water from passing through the unit. Also, install the outlet pipes that connect the tankless water heater to the faucets.

5. Check for leakage

Once you have fixed all pipe correctly, the next step is checking for leakage. Open both cold and warm water valve then watch to see if there are any leakages. Fix any leakage detected. Opening the hot outlet also helps to eliminate air from the pipe.

6. Make electrical connection

This is a very crucial stage that needs to be done keenly. A single mistake can cause fire, damage the entire system and in some cases, injure to people who close by. It is there essential to be keen. Follow the manufacture manual when making electrical connections. Don’t hesitate to consult your electrician in case of uncertainties. Once you are done, double-check all electrical connections to make sure everything is okay.

7. Switch on the unit

Once you are sure that you made all connections correctly, reattach the unit’s front cover, attach the unit to the socket then turn on the circuit breaker. Your electric tankless unit should be working. If that is the case, then configure it according to your preference.

How to Take Care of Electric Tankless Water Heater

A tankless water heater can accumulate minerals that can end up damaging the heating chamber. Proper maintenance is, therefore, essential. Below are tips on how to take care of the electric tankless water heater.

Use vinegar to clean the heater. Vinegar will help remove minerals that have accumulated on the unit. This will help prevent corrosion that could eventually damage the tankless heater.

Remove the purge valves and clean them. Also, relieve pressure from the valve

Reassemble the system then turn it on to see how it is performing. The electric tankless water heater is supposed to be operating quietly and efficiently.

Cost of The Best Electric Tankless Water Heaters

How much does electric tankless water heater cost? This is a question that you are probably asking yourself. Unfortunately, this question does not have a definite answer because the cost of such heaters varies.

However, if you check electric tankless water heater reviews online, you will find out that the average cost ranges between $150 and $1000. Those that feature advanced technologies are usually more costly than those that have few features. Some of the factors that determine cost include the quality of features used, size the unit, space consumed among many others.

Final Words

In conclusion, buying an electric tankless water heater is a great idea. However, you need to research first before you make your final decision. That way, you will be able to buy the best electric tankless water heater that meets your needs.

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