8 Best Electric Tankless Water Heater 2024 – Reviews & Guide

More and more people are going for electric tankless water heaters nowadays as they are space-saving and efficient when compared to the space-hogging classic water heaters.

Since cutting edge technology has made water heating efficient and economical. It makes perfect sense to go for an electric tankless water heater.

As there are numerous brands out there vying for your attention, choosing the best electric tankless water heater can be dicey for some.

To help you we make an informed choice while buying the best tankless electric water heater, our expert panel has reviewed the following top rated heaters.

Best Electric Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater claims to save up to 50% on your water heating costs with its patented self-modulating technology.

Its dimensions are 17H x 17W x 3.625D inches. It has 3/4-inch NPT pipe fittings.

It contains copper and stainless components that are efficient, durable and easy to replace.

It is compact and stylishly designed to handle on demand water heating. It can handle around 6 gallons (22.71 liters) a minute- meaning you can run four showers and a sink simultaneously! If you choose the right size for your requirements, you will never run out of hot water.

The EcoSmart ECO 27 Electric Tankless Water Heater heats the water as it passes through. No need for storing water like in the conventional tank-type water heater.

This best electric on demand water heater turns on only when you need hot water and is incredibly energy efficient.

Best Electric Tankless Water Heater

Made with German Engineering, the Stiebel Eltron Tankless Water Heater assures a continuous and unlimited supply of hot water on demand. Its sleek design takes less space, is attractive and requires no venting!

The Advanced Flow Control technology ensures that the water stays hot throughout and does not store water like the bulky conventional water heaters.

For the maximum efficiency and accurate temperature delivery, the Stiebel Eltron incorporates digital displays.

It also has pre-set temperature buttons for temperature memory settings. It delivers constant energy savings with its intelligent self-modulating technology.

The Stiebel Eltron Tankless Water Heater weighs one pound and has the dimensions of 4.6 x 16.6 x 14.5 inches.

The operation is silent and hassle-free. Its copper sheathed heating element is housed in a copper cylinder. What’s more, it adheres to the highest standards of safety, comfort, and reliability.

EcoSmart ECO 11 Electric Tankless Water Heater

If your home is in a location where the incoming water is 67 feet (20.42 meters) and above, many electric tankless water heater reviews consider EcoSmart ECO 11 as the best electric tankless water heater for all your hot water needs.

This model can heat up to 2-Gallon of water per minute. It has digital temperature control that allows you to set your temperature in increments of 1 Degree.

EcoSmart ECO 11 claims to save up to 50% of your water heating costs.

Its patented self-modulated design offers continuous hot water while saving energy. These tankless water heaters are 99.6 % energy efficient with a Uniform Energy Factor of 0.98.

Due to the EcoSmart ECO 11 Electric Tankless Water Heater’s compact design, it does not take up too much space like the conventional storage water heaters.

It comes with a limited lifetime warranty and easily replaceable elements. The product dimensions are 3.8 x 8 x 11.5 inches and it runs on 240 V AC and 13000 watts of power.

best whole house electric tankless water heater

It was Stiebel Eltron who invented the tankless water heater around 90 years ago. The Stiebel Eltron conforms to the highest safety, comfort, and reliability in the industry.

You will never run out of hot water, unlike conventional space-hogging water heaters. It is among the best whole house electric tankless water heater out there.

German engineering has made it one of the best tankless electric water heater out there. The advanced flow control tech gives you a constant supply of hot water.

The intelligent self-modulating technology optimizes energy use and ensures savings in electricity.

The whole house electric tankless water heater runs silently and is sleek and compact. It has a solid copper heating chamber.

Its dimensions are 16.5 x 4.5 x 14.5 inches and it runs on 240 V electricity with 29000 watts of power.

It has a 7-year leakage warranty and a 3-year warranty for parts.

Marey ECO150 Tankless Water Heater with Smart Technology

The Marey ECO150 Tankless Water Heater employs Smart Technology to program the exact desired water temperature thereby optimizing energy consumption.

It has a flow-switch activation mechanism for producing constant temperatures with as little as .5Gpm/5Psi.

The Marey Eco150 is ETL approved. It is sleek and compact while being extremely efficient. With 14.6kW units, it can comfortably handle two simultaneous points of use.

It can increase the incoming water temperature up to 41°F at a water flow rate of 2.5GPM.

It is a top rated tankless water heater which includes a German-designed, patented heating element with a stainless-steel water channel.

The Marey Eco150 has a 5-year warranty and needs to be installed by a professional.

It has digital temperature control which is easy to program. It runs on 220 V AC and 14.6kW of power.

Its dimensions are- 8.7 x 3.5 x 14.2 inches. It is perfect for smaller houses that have lesser points of use.

best tankless electric water heater

The Eemax EEM24018 is a compact tankless water that is perfect for small homes where hot water needs are comparatively less.

It has incorporated the self-modulating technology for efficient and intelligent water heating. It is made up of resistant material and looks stylish.

The Eemax EEM24018 Electric Tankless Water Heater has incorporated a digital temperature control that can raise the water temperature in increments of 1°F ranging from 80°F to 140°F.

It is one of the easiest to install tankless water heaters out there.

The Eemax EEM24018 is made out of stainless steel and has a dimension of 17 x 14 x 3.8 inches.

It runs on 240 V electricity and has a warranty of 5 years for leaks and 1 year for parts.

Best Electric Tankless Water Heater

This sleek tankless water heater is as big (or small) as an oatmeal box! The ECOTOUCH Electric Tankless Water Heater comes with a digital display and touch control panel.

All you need to do is set the temperature and turn on the tap!

All electric tankless water heater reviews consider it a top rated tankless water heater for a single point use.

The ECOTOUCH Electric Tankless Water Heater heats 1.2 GPM water from 67℉ to 109℉. Great for wet bars, strip malls, doctor's office, kitchen and bathroom sinks.

With a smart modulating control for stable temp, this water heater adjusts exact power input according to power calculation based on flow rate and temp setting in real-time.

The ECOTOUCH Electric Tankless Water Heater is made up of glass and has a dimension of 14.9 x 10.8 x 4.8 inches. It runs on AC with 240 V and 5.5 KW.

It is, however, important to read the instruction manual to determine the best specs and electrical infrastructure for your use.

top rated electric tankless water heaters

These electric tankless water heaters are available in 4 compact sizes. They can be wall-mounted under the sink or can fit in any cabinet. It has an understated design that fits into any décor. It saves energy and money and is great for small spaces.

It’s been Backed by a limited 5-year warranty on the heating element and 1-year limited warranty on other components. The Bosch Electric Tankless Water Heater is a top rated electric tankless water heaters perfect for a small home.

You get hot water where it is needed and whenever it is needed.

Because the Bosch Electric Tankless Water Heater does not store water, it has 98 % efficiency with minimal stand-by loss!

Most of their models come with high/low KW settings and universal horizontal/vertical mounting options.

Things to consider before buying the Best electric tankless water heater

Energy conservation is the buzzword today. Not only does it keep your power bills down but it also is good for the environment.

It is no wonder many are opting for the best electric tankless water heater that they can afford over the space-hogging conventional water heaters.

The electric tankless water heater reviews tend to confuse. When you are looking to buy an on-demand hot electric water heater, these are the things to consider-

  • Incoming water temperature

If where you stay the incoming water temperature is cold, it will drastically affect the flow rate of your inline electric water heater. Cold water flows through the electric heating element and gets heated.

If the incoming water is too cold, it will take a longer time to heat with the same power and so the flow rate will be low. You need to go with units that are powerful enough to handle low water temperatures in cold areas.

  • Number of points of use

If you live in a large house with multiple points of use, you need to go for a whole house electric tankless water heater which is considerably more powerful than the ones that are used for smaller dwellings.

More power translates to higher flow rate and thus you can easily run 3-4 showers and hot water faucets (for washing machines, sinks, etc.) simultaneously without experiencing a drop in the flow rate or temperature.

  • Ease of use and smart technology

The best tankless electric water heater today has a host of advanced electronics that controls the flow rate and heat giving you a consistent supply of hot water while saving on energy consumption.

Many come fitted with LED touch panels that are very convenient to operate.

Cutting edge tech has made heating water-efficient, energy-saving and user-friendly as never before. So, it is important to consider if your instant electric water heater has incorporated the latest smart technology.

Check This Differences & Comparisons : Gas vs Electric Water Heater – Differences and Comparisons

Advantages of Electric Tankless Water Heaters

  • Cost-effective

When compared with conventional water heaters, the instant electric water heater is more expensive. But in the long run, it typically lasts longer and saves more energy.

If you are looking at cost-saving and lesser impact on the environment, electric tankless waters are the ones for you.

  • Space-saving

Tankless water heaters are considerably smaller than the conventional ones. That is because they do not have a tank to store and heat water.

It is discrete and can easily fit into your decor. Since it is compact and requires no vent, it can be installed almost anywhere!

Continuous hot water- Inline electric water heaters give you a continuous supply of hot water with consistent heat on demand.

  • Easily replace parts

All tankless electric water heaters are consistent on one fact- these water heaters are built to last and can be repaired easily. Traditional water heaters have leakage issues and sometimes the whole unit has to be replaced.

  • Freshwater all the time

Conventional water heaters have tanks that store heated water. Over time rust and other debris can accumulate resulting in health issues. This is not a problem with tankless water heaters. You get fresh water every time.

Disadvantages of Electric Tankless Water Heaters

  • Initial cost

A tankless water heater can sometimes be 3x the cost of traditional water heaters. But in the long run, they are more cost-effective.

  • Lesser capacity

For large households, it is sometimes better to have two waterless water heaters as the simultaneous demand for hot water reduces its effectiveness. Buying a 6 gpm tankless water heater may be a solution but in many cases an overkill.

  • Higher power

Older households might need to upgrade their power source as they may not support an on-demand tankless waters power requirement.

Limitation of output during cold weather- Cold incoming water will reduce flowrate drastically as water takes more time to be heated.

  • Protection for outdoor units

If you have an outdoor electric tankless water heater, it needs to be shielded or will be damaged due to the elements.

Different Types of Electric Tankless Water Heaters

There are so many types of electric tankless water heaters available but we found that 4 of them are suitable for you.

  • Whole house electric tankless water heater.
  • Portable Electric Tankless Water Heaters.
  • Point-of-Use Tankless Electric Water Heaters.
  • Outdoor Tankless Electric Water Heaters.

Best Uses for Electric Tankless Water Heater

To wind up

Best electric tankless water heaters are your best choice for a cost-effective and long-lasting water heating solution.

While choosing a whole house tankless water heater, you must carefully consider your hot water demand. For a single point of use, smaller capacity will do.

When you live in areas that can get cold, a higher capacity one will give you better flowrates. Maintain your on demand tankless water heater by flushing the inlet pipe twice a year. It will last years and serve you well.


  1. Sharon Gallagher

    Absolutely love the Stiebel Eltron Tankless Water Heater! I got this unit as a backup to my ground source heat pump because I was having control board problems and I had two unused 30 amp circuits and wiring. It was easy to install and works wonderfully.

  2. Angelia Mota

    I’ve owned the EcoSmart ECO 11 for about a month and have been doing great. Excellent performance, consistently hot water, and great energy savings. I installed it myself and it is working beautifully. It paid for itself in energy savings alone. This product is worth every cent. Thanks for the help!

  3. Lisa Entwistle

    Thanks – really useful post, you have mentioned all viable options in this review, and it is appreciated. My favorite heater is Stiebel eltron tankless water. This is exactly what I wanted to eliminate my gas-fired tank water heater. I have solar power, so it makes no sense to burn gas when I am generating my own electricity. The unit is light and easily mounted on a wall. I am happy with it.

  4. Stacy Gonzalez

    Appreciating the time and exertion you have pitched into your website and the depth of knowledge you provide. I honestly enjoyed reading your whole write-up. I am interested in purchasing this ​Stiebel Eltron Tankless Water Heater and would like to know, can this unit supply a 3,700 sq foot home with 3 1/2 baths? Thanks!

Leave a Reply

Your email address will not be published. Required fields are marked *