The Best Electric Tankless Water Heaters For Your Home

Last Updated on September 13, 2021 by Michael

Otherwise known as demand-type or instantaneous water heaters, tankless water heaters are machines that provide hot water only when it is needed.

Unlike storage water heaters that store hot water and have problems with energy losses, tankless water heaters do not store hot water, and they can save you a lot of money.

Their fuel source can either be natural gas or electricity.

best electric tankless water heater

How do they work?

Tankless water heaters heat the water directly. When the hot water tap is turned on, cold water travels into the unit. Depending on the power source, natural gas, or electricity, the heater heats up the water.

This contraption, therefore, does not need a storage tank to store the water. The supply of hot water is constant, and no one needs to wait for a storage tank to fill itself up with enough hot water before they can use it.

However, as splendid as it is, the output of the tankless water heater limits the flow rate of the water. At the maximum, they provide hot water at a rate of 7.6-15.2 liters per minute.

And, they might not be capable of providing a simultaneous supply of hot water in large households. The solution is to install more than one tankless water heater wherever you might need them.

You can use an instantaneous water heater in bathrooms, for a hot tub, as an appliance booster, for example, a dishwasher, or as a booster for a solar water heating system.

Note that all units require flushing from time to time due to hard water build-up.


Best Electric Tankless Water Heater Reviews

1. EcoSmart ECO 11 Electric Tankless Water Heater (Best For Tiny Homes)

EcoSmart ECO 11 Electric Tankless Water Heater

check price amazon

The EcoSmart Eco 11 tankless water heater is an affordable and high-performance unit. As an electric water heater, it does not require flames or burners, only a steady supply of electricity. It is also very compact.


Built for small and mid-sized homes in moderate climates with temperatures above 67 degrees Fahrenheit, it is not efficient for large homes with 3 or more bathrooms, commercial businesses, or cold weather climates.

Features and capabilities

  • On-demand hot water

This heater can heat water up to 105 degrees Fahrenheit in an instant. After achieving this temperature, it sends the water down through the pipes to where it is needed. You can also control the temperature of the water heater.

However, if the incoming water temperature is below 67 degrees Fahrenheit, it reduces the effectiveness of the water heater. This can lead to a lower maximum water temperature or a decreased water flow rate.

  • Energy efficient

This water heater can help you save about 60% of your energy bills. Since the water is not on standby, you can turn it on and off at will which would also turn off or on the heater and all heating activities.

  • Easy to use and install

It is very easy to use and install since it has a resettable and automatic thermostat. The heater also sets the initial temperature itself. You would only have to adjust it if you are not comfortable with the temperature.

  • Lasts long

The manufacturers offer a lifetime warranty for all heaters that are used for residential purposes and installed by a licensed professional. Check out the manual for more information on the warranty. Like all tankless water heaters, the EcoSmart Eco 11 tankless water heater has a long lifespan.

  • It is made of copper or stainless steel, so it is durable.
  • It takes up a small amount of space.
  • Uses technology for controlling its output, thereby providing optimal performance.
  • It can be used in various ways.
  • Can heat up to 2 gallons of water per minute.
  • Its “point of use design” is not always ideal.
  • It must be installed with a restrictor.
  • It must be installed by a licensed professional to validate the lifetime warranty option.



2. Stiebel Eltron Tankless Water Heater – Tempra 24 Plus (Best For Large Family)

Best Electric Tankless Water Heater reviews

check price amazon

This is a reliable water heater for a home. It provides comfort, operates silently, and never runs out of water. Notwithstanding these, it maintains a constant temperature and saves energy and costs.

It has a digital display that allows you to set and monitor your temperature settings. This heater also has 2 pre-set memory selections that are programmable.

It is compact, and can automatically determine if the demand for hot water is exceeding capacity. If it is, the Stiebel Eltron Tankless Water Heater-Tempra 24 plus can reduce the water flow.

Features and capabilities

  • Continuous hot water flow

This heater maintains the water temperature to give constant comfort. It will also decrease the flow if the hot water demand is more than the capacity. With it, you can have hot water showers all day long.

  • Space and energy saver

It has a small, sleek, and compact design, so it provides a lot of space when installed. It also saves energy with its automatic modulation and its. Ability to control the flow of water electronically. You can even check how much you’ve saved on energy on the monitor.

  • Ease of operation

It has an electronic switch that activates it and is noise-free when it is in use. It also has a digital temperature display and pre-set memory buttons, all these to ease its operating mechanism.

This heater offers an output water temperature of 68 degrees Fahrenheit to about 140 degrees Fahrenheit.

  • Reliable warranties

The Stiebel Eltron’s tankless water heaters have a 7-year leakage and 3-year parts warranty included with their purchases.

  • Provides the user with ultimate control.
  • Provides consistent hot water temperature, no matter the demand.
  • It operates silently.
  • Has a compact design.
  • It is not a reliable heater for older homes with little or no electrical systems.
  • It is expensive compared to other tankless water heaters.



3. Stiebel Eltron Tankless Water Heater – Tempra 15 Trend

 Best Electric Tankless Water Heater 2021

check price amazon

The Stiebel Eltron Tempra are models of water heaters that are designed to replace the conventional storage water heater.

They supply hot water to multiple places in a household or a single point, depending on where you need them. There are many series of the Stiebel Eltron Tempra, and that includes the Tempra 15.

It has a minimum power of 10.8 kW on a 208v power supply and a maximum power of 14.4kW on a 240v supply.

It also has two heating modules and can heat up to 3 gallons of water per minute with a temperature rise of 33 degrees Fahrenheit.

Features and capabilities

This water heater minimizes energy consumption with very high energy efficiency. It is small and sleek, so it does not take up much space after installation.

You have total control over the heater’s temperature. You can also use it as a solar heating system or with preheated water of up to 131 degrees Fahrenheit.

It is very easy to install and operate.

  • It is very compact.
  • Easy to install and use.
  • It allows you total control over the temperature settings.
  • Helps to save energy and energy costs.
  • It is corrosion-resistant.
  • It has a short warranty period.
  • Sometimes, you might have insufficient water for more than one shower and low performance.



4. Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY

rheem Electric Tankless Water Heater

check price amazon

This heater is ideal for multiple points of use or a single point, depending on how you want to use it. It has an energy efficiency of 99.8% and can supply hot water continuously and consistently to its connected faucets.

It can also be installed under a sink or in an RV, because of its compact size.

The temperature settings range from 80 degrees Fahrenheit to 140 degrees Fahrenheit and have a digital temperature display that you can adjust in increments of 1 degree Fahrenheit.

It is very durable with a water flow rate of 4.8 gallons per minute.


Features and capabilities

  • Energy efficient

This heater has an efficiency of 99.8%, which means that it saves you energy and also energy-related costs.

  • Durable and corrosion-resistant

It is made from copper materials that are resistant to corrosion. What this means is that the heater is very durable under severe conditions and can last for a long time.

  • It is compact

The heater’s design makes it fit into small spaces for installation purposes.

  • Warranty

The heating chamber of this heater has a warranty of 5 years, however, other parts of the heater have a 1-year warranty period.

  • It has a high energy efficiency, which saves more money for the user.
  • provides a fast and consistent hot water supply to wherever it is needed.
  • It has a small, sleek, and compact size.
  • Its temperature control can be adjusted in increments of 1 degree Fahrenheit.
  • Has a simple operation.
  • It is very durable.
  • For whole-house installations, this heater has a low flow rate.
  • It cannot be used for several appliances simultaneously.
  • You might need to modify your electrical system to accommodate the heater.



5. Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater (Best Value For The Money)

ecosmart Electric Tankless Water Heater

check price amazon

Tankless water heaters are favored because of their specifications and ability to save energy and energy-related costs.

And one of the excellent models of tankless water heaters is the Ecosmart Eco 36 36kW 240v electric tankless water heater. It is a sleek and compactly designed heater that will help you save money when you use it.

Features and Capabilities

  • It is easy to use

This heater is very easy to install, maintain, and use. All the information that you need is in the manual, and you do not need a professional’s help to understand the working process.

  • Very adjustable

You have a maximum amount of control over the heater. You can adjust the water temperature whenever you wish.

  • It self-modulates

The heater can also adjust the flow of water when the demand exceeds the supply. It can also increase the temperature by several degrees based on the temperature of the incoming cold water.

  • Warranty

It has a lifetime warranty for residential buildings. However, this warranty is limited when it is used in commercial buildings.

  • It is a self-modulating piece of machinery.
  • It is suitable for use in places where the temperature is below 40 degrees.
  • Can work with two showers simultaneously.
  • It can be used for a single point of entry or for multiple points.
  • It has a digital screen to give you a clear view of the temperature.
  • It is not suitable for large homes.
  • It may need more electric input due to electric draw that needs 160 amps of box service.
  • You cannot adjust the temperature of an individual faucet.



6. Camplux Tankless Water Heater Electric with LED Display 120V Instant Water Heaters Under Sink(Best For Rv)

check price amazon

You can use the camplux in the outdoors, apart from its indoor use. It can fit into any RV, boat, or even a kitchen station. The unit has a 2.5-gallon water tank that is glass-lined and has extra insulation.

It can heat about 6.8 gallons of water per hour, and also has a thermostat that is easy to use.

Apart from these properties, it also has a freeze-protection button that prevents water from freezing and an overheating protection button.

Features and capabilities

  • It has an easy to use thermostat

It has a very easy-to-use thermostat. You only have to turn it to high, medium, or low, and watch it work. There are no complicated settings you need to make.

  • It has freeze protection

This feature is great if you are installing the heater in an outdoor location like your boat or RV. This will keep the water from freezing during cold winters or seasons.

  • It has overheating protection

With this heater installed, you can be sure that there won’t be any fires. This feature protects the unit from overheating and from potential fires.

  • It has an easy to use thermostat.
  • Has freeze protection.
  • It has overheat protection.
  • It is compact.
  • Its dimensions are misleading.



7. Stiebel Eltron 230628 240V, 12 kW DHC-E12 Single/Multi-Point-of-Use

Stiebel Eltron 230628 240V, 12 kW DHC-E12 Electric tankless Water Heater

check price amazon

You do not have to adjust your electrical system to accommodate this Stiebel Eltron’s model of the water heater. It is the smallest of the pack but has high efficiency.

You can use a shower and a faucet simultaneously and still get optimum performance from this heater.

Its minimum activation flow is 0.3 gallons per minute, and this means that with low gallons per minute faucets, you will get hot water instantly.

There is no pre-heating period with this water heater.


Features and capabilities

  • High energy efficiency

It has a high energy efficiency which can help you to save costs on energy bills. As small as it is, it works extremely well.

  • Self-modulating technology

Like all other models in the Stiebel Eltron series, it has self-modulating technology. This means that it can adjust the flow rate and temperature of water-based on demand and availability.

  • Wide temperature range

It has a wide temperature range from 86 degrees Fahrenheit to 140 degrees Fahrenheit, so you can adjust it to whatever temperature suits you.

  • Small-sized

It is compact, and therefore, can fit into tight spaces during installation.

  • It is very small—the smallest tankless water heater.
  • You do not need to upgrade your electricity grid to accommodate it.
  • It is cheap.
  • There are smaller models of it available.
  • It cannot work for you if you need large amounts of hot water.
  • Its multi-point use is very limited—a shower and a faucet simultaneously.



8. Tankless Water Heater Electric ECOTOUCH 9KW 240V (Best Point of Use)

ecotouch Electric tankless Water Heater

check price amazon

This heater provides consistent and limitless hot water for use. It is also a self-modulating heater. It gives the user maximum temperature control, has high efficiency, has easy controls, is convenient, and has a compact size.

Features and capabilities

  • Consistent hot water supply

This heater delivers a consistent hot water supply with a flow rate of 1-1.5 gallons per minute, and you do not have to wait for preheating or a standby energy loss. It also heats water from a temperature of 67 degrees Fahrenheit to about 106 degrees Fahrenheit.

  • It is energy efficient

The unit has about 99.8% thermal efficiency. This implies that there is very little energy wasted, and you can save up so much on your energy bills.

  • It is perfect for sinks use

Because of its compact size, you can use it for your bathrooms and kitchen sinks. You can also install it for your dishwasher or for your washing machines. The reviews on this product has been very great.

  • It adjust the power input based on the water flow rate.
  • It has. A digital display and touch control panel.
  • It is about 99% energy efficient.
  • It does not have a bottom mounting bracket, so it is not easy to mount.



9. Marey ECO150 220V/240V-14.6kW

check price amazon

The Marey ECO150 220V/240V-14.6kW Tankless Water Heater is a corrosion-resistant heater that is also compact in size. It also has a smart LCD display that shows the water levels when it is in use.

With this heater, there is no preheating period, all you have to do is connect it to electricity and within minutes, you can use your hot water. With an uninterrupted power supply, the Marey Eco150 can heat up 2.5 gallons of water per minute.

However, it has a complicated installation process, so you might need a professional to help in that regard.

This heater has a five-year warranty and can be maintained or repaired very easily.

Features and capabilities

  • Corrosion-resistant

The materials that make up the Marey Eco150 heater are resistant to corrosion. They will also last for a long time to come, so you do not need to worry about repairs.

  • LCD display

It has a smart LCD display that shows the water and gas levels during the period of use of the heater. You can also adjust the temperature settings to suit your needs.

  • Consistent water heating

This heater can heat up about 2.5 gallons of water per minute, so with it, you can expect a continuous and consistent hot water supply.

  • Sleek design

It has a compact and sleek design that makes it fit into small spaces during installation.

  • Warranty

The Marey Eco150 has a five-year warranty on it. Also, you can easily get it repaired if it becomes faulty. Its maintenance process is also not difficult.

  • It can heat up to 2.5 gallons per minute.
  • Has an LCD display panel.
  • It is a corrosive-resistant heater.
  • It is cost effective and eco-friendly.
  • A few people have reported a little leakage in the unit.



10. Rheem RTEX-18 18kW 240V

check price amazon

This heater heats up the water instantly and can provide a continuous flow of hot water on demand. You can also use it for a single point of use or for multiple applications.

Features and capabilities

  • Controllable thermostat

It has a thermostat that you have total control over to set the temperature to whatever you want. It also has a wide temperature range.

  • LED display

Using this display, you can easily set the thermostat’s temperature and clearly see what it is.

  • Simple operation

It has a very simple operation and installation process. Very easy to replace it if you want.

  • It has a controllable thermostat to adjust temperature.
  • Very easy to install.
  • It provides consistent and continuous hot water on-demand.
  • It is not very durable.
  • Limited warranty.
  • It is not suitable for large households with big water needs.


Buyers’ Guide: Is An Electric Tankless Water Heater Worth it?

Do you need an electric water heater and don’t know which one to go for? Read through the buyers’ guide below. It should help you in making the perfect decision.

What should you consider when buying an Electric Tankless Water Heater?

When buying a water heater, you must consider all of the factors mentioned below. However, the first step is knowing what your household needs. When you do that, it narrows down your search and helps you find the perfect one. Some factors you should consider include:

  1. Can your home accommodate the heater?

There are homes that cannot accommodate an electrical water heater because they lack the electrical requirements necessary for it.

If you try to install a water heater in such a home, you will spend a lot of money on installation expenses. This is because you need to upgrade the electrical system of the house.

However, with the installation problems gone, you can enjoy your water heater with no issues. You do not need a vent, and you can install it wherever you want.

  1. What design are you looking for?

Electric tankless water heaters are very small and compact. You can fit them anywhere. And with this small size, they are very energy efficient.

You can diagnose and repair your unit yourself. And that’s the advantage of their sleek design—they have a longer service span.

  1. How efficient and cost-effective is the heater?

Electric heaters save a lot of energy. They all use about 98% of the energy they receive, which means that they do not waste power.

However, they require a large amount of operating power. Since they do not waste energy, you will save up more on your bills.

  1. How big is its water flow?

To effectively serve your needs, you will need a water heater with a big water flow. You should choose between a single-use heater and a whole-house heater.

A single-use heater is fit for smaller families or people living alone. On the other hand, a whole-house heater can provide kitchen and bathroom faucets at the same time, and it is fit for large households.

  1. Is it safe?

You should not just buy a water heater, consider the features that come with it. One of such features is the safety feature.

Most electric tankless water heaters come with protective features like temperature lock, self-modulation, et cetera.

Make sure to consider these things.

  1. What is its warranty?

You should get an electric water heater with a warranty that covers leaks and part failures. Electric tankless water heaters with a long warranty imply product reliability.

It assures you that you will spend little to nothing on repairs and maintenance.

These are the factors you must consider before you make a choice.  Considering all of these factors will help you to pick the perfect electric water heater for your home.


Frequently Asked Questions (FAQs)

  1. What are the advantages of using an electric tankless water heater?

With a tankless water heater, you will have a consistent and endless supply of hot water. They heat up water that pass through it without storing it up. This water will remain hot, and when it finishes, it will heat up some more water for your use.

  1. What faucets do I need to operate an electric tankless water heater?

Electric tankless water heaters work best with water-saving faucets. These faucets have aerator screens built into them, and they allow a water flow rate of two GPM.

  1. Will my home accommodate an electric tankless water heater?

In most cases, you might need to upgrade your home electrical system to accommodate an electric tankless water heater. And this upgrade can be expensive, depending on the heater you want to install.

  1. Why should I use an electric water heater?

You should use an electric water heater if you are looking to cut your electricity bill and save cost. They are energy efficient and can save you about 60% on your energy costs.

Do you need an electric water heater and don’t know which one to go for? Read through the buyers’ guide below. It should help you in making the perfect decision.



These are the ten best electric water heaters around. Not only are they all energy-efficient, but they are also reliable.

However, you should understand what you need, so that you can pick the best fit for your home. Go out there with confidence and buy your electric water heater. May it serve you well.

Leave a Comment