Top 10 Best Electric Tankless Water Heaters

Electric Tankless water heaters are more of a necessity than a luxury. Therefore, we have come up with some of the best electric tankless water heaters for you.

Today, we firmly believe that instead of using the classic tank water heater, you should instead install an electric tankless water heater. After all, tech modernization has rendered the classic tank water heater useless. These high-performance water heaters are the future.

Traditional tank water heaters are not energy efficient. Besides, they take up a lot of space during installation. The advent of electric tankless water heaters has revolutionized water heating at home. A Batemans Bay Electrician states that are popular, powerful, and energy-efficient, these modern water heaters are now a must-have for any home or residential apartment.

According to recent statistics, the general market trends indicate an increase in demand for electric water heaters. More and more users are embracing the change. You have no reason to be left behind in this tech revolution.

That being said, our review includes some of the best brands of electric tankless water heaters. The collection includes affordable, energy-efficient, and powerful varieties.

Overview - Top 10 Best Electric Tankless Water Heaters

  • Best self-modulating technology: Rinnai V65IN Tankless Water Heater “The compact and sleek design, along with the condensing technology, 10-year warranty, and extremely easy installation makes it an excellent tankless water heater.  Rinnai is no doubt an excellent piece of technology.”
  • Best durable quality: Stiebel Eltron Tempra 24 “Stiebel Eltron Tempra 24 is best for a small to medium-size household. It can produce a continuous stream of on-demand water.  It has the ability to deliver hot water within a minute.”
  • Best for small spaces: Stiebel Eltron 232886 Tempra 36 “Tempra 36 is another great tankless water heater by Stiebel Eltron. The portable heater can cater to small to medium-size families and it comes with a three-year warranty.”
  • Best prices: Bosch Tronic 3000 “Bosch Tronic 3000 is among the best tankless water heaters. It heats up water within a minute. The unique and compact design ensures that it blends in everywhere seamlessly. In addition, the product is highly cost-efficient.”
  • Best stylish design: EcoSmart ECO 11 Electric Tankless Water Heater “The powerful, yet compact electric tankless water heater can heat 2 gallons of water in a minute. Its temperature control system makes it energy efficient.”
  • Best temperature regulation: Rheem RTEX Water HeaterEasy to install and easy to use, Rheem RTEX is no doubt an excellent residential tankless water heater. It provides an endless supply of water for your kitchen, laundry room or bathroom.
  • Best for residential use: ecoSmart ECO 18 “Another great addition to our best electric tankless water heaters is ecoSmart ECO 18. The compact, stylish and portable water heater comes with modulating technology to ensure an endless supply of hot water.”
  • Best for commercial application: Tankless Water Heater Electric ECOTOUCH “This amazing water heater is efficient and reliable. It produces a continuous supply of on-demand water instantly. Yes, you heard us right. You don’t have to wait even for a minute, the heater will deliver hot water as you turn it on.”
  • Best silent water heater: Bosch Tronic 3000 T “The Bosch Eclectic mini water heater can get hot water real fast. Its portable design and compact size allow you to install it anywhere you like. It is perfect for small families.”
  • Best flow control: POU 3.5 Point of Use Electric Tankless Water Heater “With ecoSmart POU electric Tankless water heater, you will never have to worry about hot water again. The sophisticated heater can continuously produce a supply of hot water.”

Whether you are a novice or experienced buyer, we have included some of the best brands of tankless water heaters you definitely want to check out. Read on for the details.

What is an electric tankless water heater?

best brands of tankless water

Tankless water heaters, also called on-demand water heaters, supply hot water only when you need it. As the name suggests, they have no tank. As such, these high end water heaters do not waste energy maintaining water at a set temperature. That is quite the opposite of traditional electric water heaters that waste a lot of energy on maintaining the temperature of water in the tank.

How do they work?

So, how exactly do electric water heaters work? Well, very simple and direct. First, it is important to note that the unit consists of a heating element and faucet. The working mechanism entails cold water being heated instantly whenever the hot water faucet is turned on. Therefore, the unit delivers hot water only when you need it. Cold water remains cold until you need it. The working mechanism is similar across different brands and models of electric tankless water heaters.

Why choose Tankless Water Heaters?

modern tankless water heater

There are a thousand and one reasons you should consider replacing your classic home water heater with a modern tankless water heater. First, you are guaranteed of a ready supply of warm water on demand. So, all you need to do is turn on the faucet and there you go.

Guaranteed supply of warm water on demand

Electric tankless water heaters only warm the water when you need it. That’s impressive because it saves on power. Unlike traditional orthodox tank water heaters that constantly heat the water, these modern varieties only heat the water when you need it. That keeps your power bills low.

Quick and easy installation process

They are easy to set up. They take up very little space during installation. So, you won’t have to worry about massive tanks tanking up most of the available space. With tankless water heaters, you do not need a big tank outside your house to store water, nor do you have to keep the thing on for hours to get warm water. Lastly, there is a drastic decrease in the consumption of energy. I can’t emphasize this enough.

Instant supply of fresh water

Because water from your electric tankless heater isn’t contained in some tank, there’s no risk of contamination. Rust and microbial contaminants won’t easily mix with your water. This is especially true because water is delivered on demand. So, it’s only heated when you need it.


Compared to traditional electric tank water heaters, the tankless models are more affordable. That is something you will love. Even with their energy efficiency, compactness, and efficient operations, these tankless water heaters are also super cheap.

Compact design

Electric tankless water heaters are compact. As such, they require very little space to install. Some units can be installed on the wall while others can be set up outdoors. Unlike traditional tank water heaters, these varieties are best suited for those who are tight on space.

Ultra-long service life

If durability is something you cherish in products, tankless water heaters won’t disappoint. Compared to traditional water heaters, these ones have a very long service life. In fact, some brands have a lifespan of up to 2 decades. So, for that long, you can have peace of mind. You won’t have to worry about leakages and other tank related problems.

Things to consider before buying an electric tankless water heater

With so many brands of tankless water heater flooding the market, choosing the right one for you can be very difficult. This is true for beginners as well as experienced buyers. As such, we have rounded up some of the things you need to consider when shopping. Here are the things to check out.

The type of fuel used

Tankless water heaters are powered by electricity, gas, or propene. In this review, our focus is on varieties powered by electricity. That notwithstanding, you can choose from an array of options available in the market. It all a matter of needs and preferences.

Design and size options

The design and size of the electric tankless water heater determines the space required for installation. Some brands and models are sizable. Such varieties require slightly more space. Then there are the compact types. As the name suggests, these ones occupy very little space. If you are living in a rental apartment, I recommend the compact electric water heaters. For persons living in very spacious homes, you can choose on any.

Warranty coverage

Because of the associated costs, products with a warranty are far better than those with none. A product warranty is a promise of quality. In case of any damage or malfunctions, the manufacturer promises free repairs and replacements during the warranty period. So, when shopping for electric tankless water heaters, it is advisable to go with varieties with a warranty coverage.

Energy efficiency

You don’t want an electric tankless water heater that is not energy efficient. Such models and brands will inflate your power bills. Luckily, most electric tankless water heaters are energy efficient. However, it is important to check the unit’s power rating. That way, you can be sure of what to expect in terms of power consumption.


Because of the broad range of options available in the market, it is crucial that you only choose on affordable yet effective varieties. Take time to compare prices. Luckily, all the brands and models of electric tankless water heaters in this compilation are affordable. We already did the price comparison for you. All that is left for you is choose the one that suits you best.

Top 10 Best Electric Tankless Water Heaters Reviews

Rinnai V65IN Tankless Water Heater

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The technological advancement allowed, Rinnai a Japanese manufacturer to come up with a sophisticated, efficient and compact tankless water heater, Rinnai V65IN. The heater uses gas as the source to heat up as much water as you like in no time.

The strong water heater can fulfill the needs of small to medium households. With just 0.32 ounces of weight, the heater offers compactness and sturdy design. Thus, you can install it in any part of your house, without worrying about space.

The water has an energy factor of 0.95 because of Rinnai’s unique condensing technology that obliges two heat exchangers.  The heater comes with an error light as well as an intuitive design. The device uses 10,300 to 150,000 BTUs of gas to provide you with an endless stream of hot water. With V65IN, you can have access to 6.6 Gallons per minute.

The device comes with a maximum temperature of 120 degrees Fahrenheit and a minimum temperature of 98 degrees Fahrenheit. Another great thing about the device is that it is environmental-friendly because of its Ultra-Low Nox technology.

Installing Rinnai is extremely easy. In comes with a detailed manual and you will just need an additional ¾ inches pipe. The rest is simple.  It addition, you can enjoy 10 years of warranty.

  • Compact and Sleek design
  • Condensing Technology
  • 10 years of warranty
  • Extremely easy to install
  • You will need an Ad-on to reach a high temperature of 140 degree
  • Sometimes it takes around 40 seconds for the machine to start generating hot water

Stiebel Eltron Tankless Water Heater

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When it comes to household equipment, you will not find a more reliable company than Stiebel Eltron.  The Germany company never disappoints will their state of the art equipment and sophisticated technology. Their new Stiebel Eltron Tempra 24 is one of the best electric tankless water heaters that you will ever come across.

Despite being extremely compact (4.6 x 16.6 x 14.5 inches’) the water heater is able to generate a constant stream of hot water whenever you want. The beautiful equipment saves you time, as you do not have to wait for it to heat up. The compact design saves space and the efficiency saves money.

The reliable heater has the capacity to work with both preheated as well as cold water. Its precise temperature control allows you to enjoy hot water up to 131 degrees Fahrenheit. Tempra 24 allows the users to set a temperature between 86F to 140F.

Once you set the temperate it is kept steady at all times because the unit modulates this power. You can enjoy 5.5 gallons of hot water per minute, thus making it the perfect heater for small to medium families.

The new model offers a 20% decrease in energy consumption while offering great efficiency and effectiveness. Tempra 24 is extremely easy to install and use.

  • Easy installation
  • Durable
  • Temperature Control
  • Requires Heavy Power

Stiebel Eltron Tempra Water Heater

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Stiebel Eltron Tempra 36 is famous for its outstanding built and innovative design. The efficient machine may be expensive, but it is a wise long-term investment. It has the ability to produce endless stream on-demand hot water to two or three bathrooms.

The energy-efficient water heater automatically makes adjustments to the internal setting to use only the required power in order to produce hot water. Likewise, its smart system adjusts the water flow to ensure that everyone gets hot water despite the frigid temperature.

The unique system of Tempra 36 eliminates the need for listing a maximum flow rate. It is perfect for applications that require a constant and steady flow of water. You will not have to think about rationing the hot water usage with this amazing piece of technology.

The manufacturer is 100% sure, of their product, thus they offer a 3-year warranty of parts. However, it is highly less likely that you would ever need to use it since the manufacturer only produces premium quality products.

  • Portable
  • Automatic adjustment of Internal settings
  • Three-year warranty of Parts
  • Cater two to three bathrooms
  • Very Expensive

Bosch Electric Tankless Water Heater

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When we talk about the leading home appliances manufacturer in Europe, the name Bosch always comes up. The company has been producing high-quality home equipment for years now. The Bosch Tronic 3000 is proof of their reliable, sophisticated and advance manufacturing.

The tankless water heater is among the best in the market. The compact heater comes with a minimum of 3.3 GPM at a 55 degree F temperature rise. You can enjoy as much hot water as you like. However, the heater cannot provide a supply of water to several major applications at one time.

So, if you are using it for your pool, wait until you are done before shifting to the laundry or any other thing. The ease of installation and the compact size further enhances its overall appeal. You can gain access to the constant output temperature due to its element modulating control unit.

Tronic 300 is energy efficient and it needs 120 amps circuit protection via 40-amp circuit breakers. In addition, it needs a 240-volt outlet to perform optimally.

  • Fast and reliable
  • Compact and unique
  • Cost-Efficient
  • Limited to 240V
  • Needs to be close to the hot water use supply

EcoSmart ECO 11 Water Heater

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When it comes to the best electric tankless water heaters, how can we miss the compact, stylish and unique ecoSmart Eco 11 water heater?  It offers you endless stream of hot water wherever and whenever you want. The heater comes with sophisticated self-modulating technology that allows the heater to regulate its output.

The heater is extremely efficient; it can heat up to 2 gallons of water in a minute.  Therefore, making it the best choice especially when you want to use hot water for multiple applications simultaneously. It is the perfect heater for anyone who lives in a cold area.

There is no denying that the heater is excellent, but the ideal weather temperature for it is 67 degrees F. The portable tankless water heater will completely blend in. Due to its size (11.5″ x 8″ x 3.75″), the heater can effortlessly fit into any place.

With ecoSmart, you will never again have to worry about hot it. The tankless water heater will take away all your worries about having hot water on demand. Install it in any part of your house and enjoy an endless stream of hot water.

  • You can install it anywhere you want
  • Compact Design and lightweight
  • Saves Money
  • Temperature Control
  • Heat 2 Gallons of water in a minute
  • Installation is expensive

Rheem RTEX-18 Water Heater

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It is time to let go of the traditional heating system in your house. You need to upgrade yourself to a more refined, enhanced, and sophisticated water heating system. Rheem Heating RTEX is an excellent residential tankless water heater.

It comes with the most sophisticated technology available on the market. It has an inbuilt external digital thermostatic control with an LED display. In addition, the compact machine comes with the feature of adjusting the power in order to meet the demand for hot water.

The lightweight (8.5 pounds) extremely powerful heater has a 240 Volts output and it is 99.8% energy efficient. It is the perfect water heater to enjoy the endless streaming of hot water without adding a lot to your bill.

It is among the few water heaters that offer not only simple installation, but also smart digital temperature display and easy replacement.  The product comes with everything that you would need in order to install it.

  • Easy to install
  • LED Display
  • 99.8% energy efficient
  • Not a good choice for Colder Climates
  • Single Point of Use

Ecosmart ECO 18 Water Heater

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If you are looking for a popular and efficient tankless water heater for a slightly warmer climate, we believe Ecosmart ECO 18 to an excellent option. The compact, yet powerful water heater can provide an endless stream of water, whenever, wherever you want.

The unit offers an output of 105 degrees and it can heat 2.5 gallons of water within a minute. However, it is important that the incoming water is around 60 degrees. In case, it cooler, the heater might not offer the same efficiency.

Since the Ecosmart ECO 18 comes with the self-modulating technology that lets it adjust the amount of energy required for water heating. Thus, it helps in saving 50% of your house’s electricity bill. You also get complete control of the water temperature because of the one-degree increment feature.

  • Self-modulating technology
  • Heat 2.5 gallons of water within in a minute
  • Durable
  • Compact and Sleek
  • To keep the warranty intact, you will need to
  • Hire professional help for installation

ECOTOUCH ECO90 Water Heater

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ECOTOUCH ECO90 is one of the best electric tankless water heaters that you will come across. Its sleek design and compact style allow you to install anywhere you like. The digital display along with the touch control panels offers the convenience of use.   

It guarantees a stable temperature because of its smart modulating technology. The heater’s sophisticated technology allows it to adjust the energy consumption according to the flow rate. With this amazing heater, you do not have to worry about over-temperature protection nor about any venting pathway.

ECO TOUCH is an excellent option for an apartment or a small house. It cannot cater to the entire house.

  • Compact Design
  • Self-Modulating Technology
  • Digital Display
  • Touch Control
  • Unable to cater to the Entire Household

Bosch Electric Mini-Tank Water Heater

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The Bosh Tronic 3000 T mini-Tank water heaters are perfect for having hot water at your disposal. The efficient and compact water heater comes with a long power cord and it is energy efficient.

The tank comes with a glass-lined inner that is Chlorofluorocarbon-free foam insulation. With this efficient and compact water heater, you can gain access to an instantaneous and on demand supply of water.

The electric water heater comes with a 2.5-gallon compact mini-tank. Despite having a tank, you do not have to wait for hours for the water to heat up. On the contrary, its advanced technology ensures a hot water supply in minimal time.

The compact size and the elegant design allow it to blend in with the modern interior of your house. You can either mount on the wall or keep in up straight. The heater will provide seamless functionality.

Since it comes with a mini-tank, you can hardly expect it to fulfill the hot water needs of the entire household. The water heater is an excellent choice for your kitchen. However, it is not a great choice for filling up your bathtub.

The consumer can choose from three different volume variation of mini-tank: 7 gallon, 4 gallon, and 2.5 gallons.

  • Reliable and Efficient
  • Compact
  • Three different volume variation of mini-tank: 7 gallon, 4 gallon, and 2.5 gallons
  • Cannot cater to an entire household

Ecosmart POU 3.5 Point Water Heater

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When we talk about the best electric tankless water heaters, how can we miss out on EcosmartPOU 3.5? The water heart is designed to provide an endless supply of water to a single sink at one time. It may lack in size, but it makes it up in terms of efficiency and reliability.

 The water heater comes with a 0.5 GPM aerator and it provides 0.5 gallons of hot water/minute.  The tanker is an excellent choice for your boat or a strip bar. It is a good water heating option in a relatively hot climate.

  • Compact and Sleek
  • Reliable
  • Energy Efficient
  • 5 gallon of hot water/minute
  • Provide to a single sink at one time
  • Does not perform well in extremely Cold weather

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