Best Electric Tankless Water Heater

The traditional and bulky tank water is slowly fading away from our homes. Not only that it takes a lot of space, but it’s also a high consumer of both electricity and money. Nowadays, people are interested in buying and using equipment that saves time, money, and space. It’s the case of the electric tankless water heaters which become more popular as we speak.

What’s the technology behind tankless water heaters?

The principles of tankless water heating are straightforward. They don’t heat and store the water in a tank (tankless!) where the energy dissipates throughout the day, but they heat the water whenever you want. You use the amount of hot water you need, for a specific amount of time.

The concept of waterless heating isn’t all new in Europe and Asia, where it has been used for many years. It was only the 90’s when the waterless system started to be more popular, with people being more interested in “green” technologies.

When it comes to the mechanism, the tankless water heaters are rather simple (no matter if they’re gas or electric). A flow sensor identifies when you’re turning the hot water faucet on, activating the tankless water heater. Several heating elements will keep on heating the water until the flow sensor identifies that the water doesn’t flow anymore (since you’ve turned the faucet off).

Why choose an electric tankless water heater?

The numbers don’t lie, and the industry of electric tankless water heater has a 7% annual growth. It’s because the electrical system saves your resources while impressing with efficiency.

Here are some of the benefits of tankless electric water heaters:

• They boost the current systems
• They’re great for point of use
• They’re a good investment for the long run
• The maintenance is simple
• They’re a solid choice for the low use households

What to look for when selecting the electric tankless water heater?

Even if some may consider the electric tankless water heaters pricey, they’re a wise investment to make. They’re highly efficient and long-lasting, surpassing both the gas and the tank models in terms of durability.

The market gives you numerous models to choose from, so a buying guide may become handy.

Without any further ado, here are some aspects to consider when shopping:

• The material is made of

With most regular tankless water heaters being made of limescale material, it’s natural that you want something that is to care for. Take a look at the content of the water heater so that you get low maintenance and long lifespan.

• Incoming water temperature

If the water temperature isn’t higher than 30F degrees, the electric water heater is the perfect choice for you. When you want the heat to go as high as 50F, no electric heater is going to be a reliable option.

• Flow rate needs

Flow rate is a fundamental aspect to consider before buying. You need a high flow rate for a washing machine, bathroom shower, and dishwasher, whereas the kitchen faucet only requires a low flow. The flow rate of the heater goes higher with the price. The better the flow rate, the higher the price.

• Size

There are models with various sizes on the market, so finding one according to your needs isn’t complicated. You also need to think about where you’re going to install the heater too. Under the sink is a great place to install an electric tankless water heater, but that’s just one example to name. Selecting the site is also going to help you narrow down your choices when shopping.

One last thought before you go shopping

You must know the bit and bobs before you go shopping so that you don’t end up with a model that is too big or too small for your households. Don’t forget to keep an eye on your wallet also!

TOP 6 Electric Tankless Water Heater Reviews

   1. Eco Touch Tankless Water Heater Electric

Anyone looking for an electric tankless water heater for sink applications should take a look at the ECO TOUCH Tankless Water Heater Electric. Even if the price is a selling point, the unit doesn’t disappoint in terms of performance either.

Thanks to the 5.5KW heating system, the unit gives instant and consistent hot water of 116F degrees. It doesn’t preheat and produces constant temperature for sinks. The water is never lukewarm, and the unit is reliable.

The water heater can adjust the power input according to the flow rate and the temperature setting. Low water flow is going to mean less power by the system, only to obtain the perfect temperature and not hot water. The unit has a 98% energy efficiency, reducing the electric bills.

The digital display and touch control panel allows you to set the temperature quickly. It’s a great unit to install under the sink. It has a compact and sleek profile, allowing horizontal, oblique, and vertical mount.

The unit can heat up to 1.2GPM water from 67F degrees to 109F degrees, whereas the smart modulating control ensures stable temperature. The build is good, and the unit comes with protection against dry heating, over-temperature, and leakage.

We like a lot some of the features:

• It has a sleek and compact profile
• You can mount it under the sink
• It has protection against leakage, over-temperature, and dry heating
• It gives constant temperature, and it’s reliable

The downsides shouldn’t stress you much:

• It may require professional installation
• It’s better for small applications

Stay focused on the positive aspects since they’re overweighing the negatives, with the unit being dependable and affordable altogether.

   2. EcoSmart ECO 11 Electric Tankless Water Heater

In all fairness, the popularity of EcoSmart ECO 11 Electric Tankless Water Heater should be enough of a reason for one to buy it. The unit is going to save you up to 60% on the heating cost, and you’ll always have hot water.

The patented Self Modulating Technology and design of the water heater ease out the installation. The unit looks sweet and subtle, and the compact design is space-efficient as well.

All the Ecosmart heaters are 99.8% energy efficient, presenting a 0.98 uniform energy factor. This model is perfect for a small apartment or small point of use application since it’s designed to heat up to two gallons per minute. It’s reliable for the weather of 67F degrees and above. You may also use it for single or multiple applications, according to your climate.

The wall-mounted design is smart, freeing floor space for more storage space.

For instance, ECO 11 may manage two sinks running at the same time with a shower in a warm climate. For colder climates, it can handle two sinks at the same time.

Operating the unit is straightforward, thanks to the digital temperature control. You may set the temperature in increments of 1 degree.  The elements are natural to replace, and the unit takes the use for a fair amount of time.

As long as you’re selecting the right size, the unit can offer endless hot water, while consuming the energy it needs, and you have complete control.

Here’s what we like the most about it:

• It comes with patented Self Modulating Technology
• It’s 99.8% energy efficient
• It’s an excellent size for a small apartment or small point of use application
• It has a compact and smart design with wall-mount

The cons aren’t major:

• You need to check continually if the hardness of the water is high
• Many should call professional for installation

Regardless of the minor problems, the unit is a dependable, energy-efficient, and compact unit that ensures consistent performance for a reasonable amount of time.

   3. Hyperikon Tankless Water Heater Electric

If you’re looking for a fast working unit, the Hyperikon Tankless Water Heater Electric 27kw, 180-250V Compatible is a reliable option to keep in mind.

The heat capacity of the unit is an impressive 87,372 BTU, and you can easily set the temperature between 86 and 126 F degrees. The micro-computer control LED display is easy to read and to use. You can even convert the degree to Fahrenheit or Celsius, just the way you want.

The minimum water flow for activating the unit is 0.85 GMP, and the water heater will use only the electricity it needs for producing hot water. It doesn’t require power for preheating, and it gives hot water fast.

For best results, you need to connect it to 3 minimum 50A circuit breaker. The unit has a good build, and it’s leakage proof. The construction recommends it for long time use since the heater is also over-heat protected at 153F degrees.

Be aware that the unit is made only for indoor use. For ensuring better performance, you should provide reliable contact with water sources. You can only install it vertically.

Here’s what we like the most about the unit:

• It gives you hot water fast
• It comes with a touch-enabled control panel for setting the temperature
• You can convert the degree to Celsius or Fahrenheit
• It’s easy to install and great value for the price

Don’t let the minor problems stand in your way when deciding:

• The housing is made of plastic
• The mounting bracket could be of better quality

All in all, the unit is a dependable, easy to use and to install a water heater that gives hot water in no time. Why not give it a try?

   4. Rheem Tankless Water Heater

Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater brings plenty of good things to the table, and you shouldn’t skip it when shopping.

The unit features external digital thermostatic control and has an LED display for easy use. You can use the one-degree increments for finding the best setting.

Thanks to the self-modulation feature, the unit is going to match the power for the right amount of hot water. The build is fantastic, and the copper immersion two heating elements take the long time use. The flow rate is up to 4.4GPM, and the unit heats up fast.

Since it’s threaded, the installation is straightforward, with the unit providing hot water for single point-of-use or several applications. It’s reliable to heat even the cold water in winter. It has a small and compact profile, for subtle installation.

Here’s our take on the pros:

• It comes with external digital thermostatic control and LED display
• It provides continuous hot water fast and on-demand
• It’s small and has a subtle profile
• It heats even the cold water in the cold months

The cons shouldn’t throw you off:

• The risk for flickering isn’t null
• The installation may get pricey

No matter the downsides, the unit is a dependable, small, and easy to use a water heater that many should consider installing in their homes.

   5. Eemax Electric Tankless Water Heater

Not only that the Eemax EEM24027 Electric Tankless Water Heater gives hot water when you need,  but it also provides a consistent temperature for the water too.

The unit features the most advanced self-modulating technology. Therefore, it’s going to adjust the energy it needs for providing the hot water you require at the moment.

Due to its compact size, the unit is easy to store. The instruction for installation is easy to follow, easing out the installation process.

It’s a 240 volt, 27kilowatt unit that is strong enough to produce hot water for up to 1 shower and two sinks at the same time, even if you live in a cold climate. Should you live in a warm environment, the unit will produce hot water for even four showers at the same time.

Let’s go over the positive features once again:

• It gives consistent, instant, and endless hot water
• It has a compact size for secure storage
• The installation process is a breeze
• It has copper tubes for housing the elements

Don’t mind the flaws since they’re minor:

• It does require a lot of electricity, but it remains energy efficient
• There may be some light flickering at first

Reliable, secure, and easy to install the unit is a significant investment to make for your house.

   6. Stiebel Eltron Tankless Water Heater

The more you’re willing to spend, the more you should expect from your tankless water heater in terms of durability and performance. Let’s start by saying that the price of Stiebel Eltron 36 Plus Tempra, Tankless Water Heater may throw off some, even though the unit is worth every single penny.

The water heater provides an on-demand, unlimited, and continuous supply of hot water, with a sleek design for straightforward installation. The unit comes with an electronic switch activated for quiet operation.

The design and build are smart, and the unit comes with user-friendly digital display and pre-set temperature buttons. The feature allows the unit to memorize your previous settings, for easy use.

The advanced flow control maintains the temperature constant, and the unit stands out with the 0.99 energy efficient grade. It also presents intelligent self-modulating technology for consistent and continuous performance.

The build is impressive, and the copper sheathed heating element is housed in the copper cylinder for durability and consistent performance.

The unit comes with seven years of leakage and years parts complete warranty. It’s small and compact and works for the entire house.

Let’s give the ethical aspects another look:

• It’s sturdy and works for the entire house
• It provides a constant, continuous and on-demand supply of hot water
• It has a frontal digital display and pre-set temperature buttons
• It presents 0.99 energy efficiency

The inherent flaws shouldn’t worry you one bit:

• One received a unit with default wiring
• Some doubt its durability

Nevertheless, the water heater stands out as a solid choice to use for the entire house, with smart features, good build, and consistent performance as selling points.

Best whole house electric tankless water heaters

   1. Thermoflow Elex 24 Tankless Water Heater Electric

If you’re determined to buy an electric tankless water heater for the entire house, you should take the plunge with the Thermoflow Elex 24 Tankless Water Heater Electric.

The water heater is going to save up to 50% in water heating costs while using up to 85% less energy than traditional storage heaters.

With the 0.6 GPM activation flow, the water heater will give you hot water for the entire house in no time. Let’s not forget to mention the self-modulating temperature technology and the backlit LCD digital temperature control. It comes with 1-degree increment, so that you may easily set the temperature from 32 to 167F degrees.

You can use the unit for bathroom sinks, large roman-style or Jacuzzi tubs, pool hoses, kitchenettes, and even commercial applications. It may heat almost 3-gallon per minute and works in climates where the incoming water temperature can be as low as 37 degrees.

The unit has an attractive style, and looks and its compact build allows effortless installation. The digital backlit LCD and touch screen ease out the operation.

The positive aspects are plenty:

• It provides a steady output temperature even if the flow rate varies
• It comes with an LCD and touch screen
• It can work for the entire house
• It’s dependable and has a stylish appearance

Don’t mind the negatives, since they’re minor:

• The water inlet and outlet are on the back, which many don’t appreciate
• Some couldn’t use the sink and the shower at the same time

Even if the unit isn’t all roses and rainbows, it’s still a great option to consider for installing in your home.

   2. Eemax EEM24018 Electric Tankless Water Heater

Are you a big fan of do-it-yourself projects? If so, you should take the leap of faith with Eemax EEM24018 Electric Tankless Water Heater. Not only that the instructions are easy to follow, but the whole installation process is quite straightforward too.

The tankless water heater is going to produce continuous hot water, as much as you need for the time you need.

It presents the most advanced self-modulating technology, adjusting the energy needs to the amount of hot water that you need. The unit has a compact size, and it’s easy to find the right place for it. The digital temperature control is both resistant and nice-looking, with increments of 1 F degree. The temperature ranges from 80F degrees to 140F degrees.

The water heater is strong enough to give hot water for up to 1 shower and two sinks at the same time, even in colder climates. If you live in warmer weather, the unit can give hot water for up to four showers/sinks at the same time.

Let’s check the functional aspects once more:

• It comes with instructions easy to follow
• It works very well, and it’s dependable
• It presents self-modulating technology
• It has a compact size and stylish profile

We’re not backing down on the cause of some minor flaws:

• Some note that it’s sensitive the flow rate
• One may think it needs a lot of power

All in all, the unit is dependable, easy to install, and gives consistent performance. Its looks only seal the deals for us.

110v tankless water heaters

   1. Electric Tankless Hot Water Heater-110V

Electric Tankless Hot Water Heater, 110V 3000W Mini Tankless Instant Hot Water is a solid choice for the RV owners. Don’t let the small size of the unit mislead you since the heater can give hot water in three seconds, saving you both time and energy.

The mini body is straightforward to install under the kitchen sink or bathroom, and you can confidently use the water heater for washing food, dishes, clothes, and even for showering.

There were no compromises made for the build, and the unit is an anti-leakage protection device. It also comes with anti-dry protection, IPX4 anti-splash protection, and hydroelectric isolation. The housing insulation protection and other safety features turn the unit into a dependable option for many applications. For instance, in case of leakage, the water heater will de-energize automatically. It also powers off automatically when without water. The over-temperature automatic power-off makes sure that nobody gets burned when using the hot water.

The standard ½ interface is easy to connect to the household conventional hose connector/shower hose/ or faucet metal hose. The LCD digital temperature display eases out the operation, and you may adjust the water temperature by water flow.

The unit comes in bright colors, and it’s easy to install.

Let’s check the right things once again:

• It’s small and dependable for RV
• It comes with many safety features
• It’s easy to install and to use
• It comes in bright and fun colors

We don’t consider the downsides to being deal-breakers:

• The temperature doesn’t get very high
• Make sure it’s the right size for your needs

With an impressive list of features, colorful body, and reliable performance, the unit is a solid choice if 110V is your needs.

   2. Mini Instant Water Heater Electric Under Sink

Another reliable 110V unit is the Mini Instant Water Heater Electric Under Sink – 3kW at 110v 120v Tankless Hot Water Heater. You only need 25-32A working current. Therefore a ten gauge wire and 30amp breaker is going to do it.

The circuit breaker has to take 30amp, or it’s not going to heat the water. Always run the heater on 110V/120V.

You don’t need to preheat the water before using it since the water is going to flow at the wanted temperature the second you open the tap. The unit safes both energy and time, reducing the electric cost up to 55%.

When the flow is high, the temperature may be low, and the other way around. Remember to control the outlet temperature on display by setting the flow.

Due to its compact design, the unit is safe to use in bathroom, kitchen, public restrooms, and so on. It’s strong enough for face/hand/dishes washing, and not for showering.

The unit is made with ABS and brass, presenting an IPX4 waterproof grade. The temperature ranges from 86 to 131 F degrees (30-55C degrees).

Here’s our opinion on the pros:

• It’s well made and safe to use in small applications
• It has an IPX4 waterproof grade
• It comes with auto on/off water flow sensor
• It’s reliable for kitchen/face/hand washing

The flaws aren’t major:

• It’s not for the high volume of water
• The water doesn’t get very hot

As long a small unit as this one is what you need for your application, the water heater is a safe choice nine times out of ten.

Portable tankless water heaters

   1. Power Levels Instant Electric Hot Tankless Water Heater

The 240V 5.5KW 3 Power Levels Instant Electric Hot Tankless Water Heater is excellent on many levels, with its compact and small body ensuring its portability.

The unit comes with a power setting and constant temperature function so that you may choose from 3 power levels. It has super low water pressure start-up, but also water flows control valve hose and shower head, holder.

The mini instant water heater system is a dependable choice for bathroom kitchen and hair salon. It has a clean and elegant appearance, without disappointing the functionality.

It’s an energy-efficient heater that saves on your electricity costs. It comes with several features for safety. It presents protection against dry heating, overheating, and electric leakage. The design and build are smart, with the auto malfunction checking function completing its description.

The unit allows 360-degree installation and  ABS construction has a durability feel to it. The water heater is an excellent value for the price and highly versatile in terms of lighting.

Let’s have a second look at the best parts:

• It comes with constant temperature function and low water pressure start-up
• It presents several safety features
• It\s a reliable option for the kitchen, bathroom, and hair salon
• It has a clean appearance and a good build

The issues shouldn’t worry you:

• The menu isn’t user-friendly
• The flow valve is made with plastic

The unit is dependable, portable, and looks very clean, managing to impress with the overall value, considering its price!

   2. Mini Instant Electric Water Heater

For those of you who are interested in a portable tankless water heater, the Mini Instant Electric Water Heater – for Shower Under Sink 240v 220v 5.5KW is another option to write down on your shopping list.

The unit comes with microcomputer memory and very low water pressure start-up. Its build is excellent, and the water heater features water leakage and earth leakage protection.

The digital LCD temperature display has touch control for effortless operation, whereas the 1-degree increments let you control the hot water easy.

Thanks to the power setting and constant temperature function, the unit are reliable. It has four power levels, with ten power settings per level.

The flow control valve, a hose shower head holder and the showerhead make it an excellent option for a bathroom application in an RV. Even if the unit works for a shower, it cannot ensure the multi-way hot water supply at the same time.

Easy to install and to use, the unit is always a good buy.

Let’s check the positive aspects once again:

• It comes with microcomputer memory and LCD temperature display
• It as water leakage and earth leakage prevention
• It presents anti-dry functionality
• You can use it for small shower applications

Even if the flaws aren’t significant, it’s only fair that we list them too:

• Its build could be better
• It works better in warm climates

Beggars cannot be choosers and, for the buck you’re paying, the unit is a solid choice for portable applications.

Under-sink tankless water heaters

   1. Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater

The compact profile and build of Ecosmart POU 3.5 Point of Use Electric Tankless Water Heaterrecommends it for under-sink installation. However, there are several functional aspects to consider.

 

 

The unit may produce hot water for just one sink at 0.5GPM in warm climates. It’s a point—an of-use model that presents a maximum flow rate of 0.5gallons per minute and comes with 0.5gpm sink aerator. You can only use it with a sink; don’t use it with a shower or several fixtures. It can heat 0.5 gallons per minute to 105F degrees.

The design is functional, and the unit comes with a digital display that informs you about the output temperature. The water heater includes copper and stainless-steel elements that ensure its durability, efficiency, and straightforward replacement.

A water heater is a reliable option for wet bars, RVs, doctor’s office, bathroom, sinks, and boats.

Listing our favorites:

• It has a compact profile for under-sink installation
• It heats 0.5 gallons of water per minute to 105 F degrees
• It has a digital display
• It includes copper and stainless steel elements

The downsides shouldn’t stress you out:

• It doesn’t heat up fast
• It’s for warm climates

As long as you need a unit for under-sink installation and point-of-usee model, you should give this one a try.

   2. Atmor Electric Tankless Water Heater

Even if the shape and profile may be the selling point of Atmor AT-910-27TP ThermoPro 27kW/240V Electric Tankless Water Heater, the unit doesn’t disappoint in terms of performance either.

The water heater has self-modulating technology for controlling the amount of energy it needs for heating the water. Its compact profile saves space, easing out the installation under the sink or wherever you need.

The digital temperature allows you to set the temperature with increments of 1 degree. The thermostatic control is ranging from 90 to 135 degrees.

The build sustains the performance and value of the unit, with the stainless steel interior being durable and corrosion-resistant. The water heater is going to cut down your energy bills and heat water as low as 37 degrees at 2.2gpm.

The unit is also IP54 certified for maintaining the internal elements safe and dry. It’s a reliable option for small and medium-sized houses and runs up to four applications at the same time.

We’ve shortened our favorites to the following:

• It includes self-modulating technology
• It has digital temperature control
• It presents a compact and ergonomic design for space-saving installation
• It has a durable and corrosion-resistant stainless steel interior

Don’t make a drama out of the negatives:

• You need to install a pressure relief device
• The diagram for installation isn’t user-friendly

More often than not, the unit is going to be a solid choice for under-sink applications, or any other space-limited situations, without ever disappointing with its power or energy efficiency.

Outdoor/outside tankless water heaters

   1. Bosch Electric Tankless Water Heater

Anyone looking for a tankless water heater for outside installation should take a look at the Bosch Electric Tankless Water Heater.

The unit is a dependable model for whole-house use, ensuring hot water whenever you need, for as long as you need. Installing the unit is simple, with the water heater being a proper option for both residential and commercial applications.

Due to the polymer encased elements and the built-in flow sensor, the water heater is going to provide a constant output temperature. It has an external temperature control knob, for impressive temperature stability and control. The element modulation is dependable for controlling a constant output temperature. We should also mention the high-tech flow transducer which sustains the performance of the heater.

Since it presents minimal stand-by, the unit has a 97% thermal efficiency. The heater is small, and you should talk to a professional for installation. The water lines should be copper or at least rated stainless steel. PEX or plastic plumbing line materials cannot be used for the water heater.

Active and running quietly, the unit works “on-demand” and takes you for decades.

Here’s the list of good things:

• It’s robust, compact and runs quietly
• It has a built-in flow sensor and gives constant output temperature
• It’s great for residential and commercial applications
• You can mount it outside

The downsides aren’t significant:

• It’s not thermostatic
• It may not perform great in cold climates

Stay focused on the positive aspects since they’re overcoming the negatives, with the unit being a durable and dependable choice for many.

   2. Rheem Residential Tankless Water Heater

The sturdy build of the Rheem 240V 3 Heating Chambers RTEX-24 Residential Tankless Water Heater makes it a solid unit for outdoor installation.

The unit presents advanced self-modulation function, adjusting its power for the hot water demands. It contains long-lasting copper immersion three heating elements, and the installation isn’t complicated. Operating the unit is also effortless, with external digital thermostatic control with LED display. There are 1-degree increments, and the temperature ranges from 80 to 140 F degrees.

The water heater provides on-demand and continuous hot water. It has a compact and attractive profile, and it’s 99.8% energy efficient. Due to its pattern and small size, finding a place for it isn’t challenging.

The harsh copper immersion heating elements with brass top expand the life span of the unit. They’re also threaded for effortless replacement when necessary.

We should have another look at the positive aspects:

• It has a compact and small build
• It comes with harsh elements that give its durability
• It’s 99.8% energy efficient
• It has a digital display, and it’s easy to control

The cons shouldn’t scare you:

• The risk for flickering lights isn’t null
• Some got the water inlet/outlet labeled wrong

Be that as it may, the unit is a reliable, robust, and energy-efficient water heater that gives you the hot water you need for a fair amount of time. Why not take the plunge?

FAQs about electric tankless water heaters

Q: Do the electric tankless water heater require a vent?

A: Unlike the traditional gas style water heaters and the gas tankless water heaters, the electric tankless water heaters don’t require any venting. It’s an important matter to consider when you don’t know which type of tankless water heater to choose (gas or electric). Since they don’t need venting, the installation costs for the electric tankless water heater are cheaper. The lack of venting also explains the high efficiency (more than 99%), as compared to the gas tankless water heaters (80-85%).

Q: How do you know the right size of an electric tankless water heater?

A: If the chance for running two showers in your home at the same time is high, you may need a five GPM flow rate for having a constant and steady hot water supply. Go with less if you only use one shower at the time.

Q: Should you invest in an electric tankless water heater?

A: When you’re looking in the long run, the electric tankless water heater is worth every single penny. It cuts down the utility bills, and the maintenance costs are rather low. Even if you feel like paying more upfront, they save more energy than the traditional models, in the long run, rending your initial investment to be wise.

Q: What are the typical problems and maintenance problems for electric water heaters?

A: Even if the electric tankless water heaters come with many benefits, there is no such thing as perfect systems, and they don’t make an exception. A failed heating element determine little or no heat, and most parts are affordable to replace. Improper settings and mineral buildup may also alter the performance of tankless water heaters.

Q: Can one install an electric tankless water heater on his own?

A: Installing a tankless water heater isn’t a “do-it-yourself” kind of project nine times out of ten. However, many models may suppose a straightforward installation which any licensed electrician and plumber can perform. The contractor doesn’t need specialized training nor experience with tankless water heaters.