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10 Best Electric Tankless Water Heaters And Their Reviews For 2021

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Tim Rhodes

Looking for the best electric tankless water heater available?

High flow rate, the amount of hot water and other factors are extremely important when considering a whole house tankless water heaters.

This is especially true for those living in colder climates and for those needing a lot of heating power.

That’s why we’ve put together this buying guide to give you the best electric tankless heater that will be best for you in the long run.

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Last update on 2021-04-20 / Affiliate links / Images from Amazon Product Advertising API

10 Best Electric Tankless Water Heaters Reviewed

Here’s a list of the top 10 best electric tankless water heater systems rated and reviewed.

Below you’ll find out their features, how they work and which one is right for you.

1. Ecosmart ECO36 36kW 240V Point of Use Whole House Electric Tankless Water Heater

Sale
Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater
  • Sleek and compact design with digital output temperature display
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Manufactured in United States
  • Pipe Fittings:3/4 inch NPT
  • Required Breaker:4 x 40 A

Last update on 2021-04-21 / Affiliate links / Images from Amazon Product Advertising API

Ecosmart Eco is undeniably by far the most energy-efficient and cost-saving whole house electric tankless heater system in the market.

It features temperature rise control mechanisms, making it easy to detect water heating temperature rise changes of less than one-degree Fahrenheit.

Its recommended breaker usage is at four by forty amperes (A).

This means it runs on an extremely low supply of electricity.

We recommend installing a sediment filter on the incoming water line to protect the unit and to filter out mineral deposits.

Ecosmart Eco is 90% smaller compared to other tanksystems suitable for small homes or an apartment.

If you’re looking for a tank system that will help save money and reduce heating bills, this is a great choice.

This electric water heater keeps up with hot water needs for the majority of households.

ECO3636 gives favor to those shoppers who want the best whole house electric tankless water heater that’s best in size and compactness.

Definitely the best tankless water heater out of our tankless water heater reviews, and plumbing experts will agree.

Pros & Benefits:

  • Can save up 90% of space compared to other tank-type systems
  • Copper and stainless steel components
  • Simple to use with its bright LED (light-emitting diode) indicator lights
  • Best point of use electric water heater on this list

Check Price and Reviews on Amazon


2. Stiebel Eltron Tempra 24 Plus 36kW Electric Tankless Water Heater

Stiebel Eltron Tempra Plus 36 kW, tankless electric water heater with Self-Modulating Power...
  • Digital temperature control
  • Proven reliability. No venting required.
  • DRAWS 150 A. Requires minimum 300 A electric service. Dimensions (H x W x D): 14.52" x 16.54" x 4.61"
  • Sleek design fits anywhere
  • Save at least 15-20% on the hot water portion of your electric bill.Requires 240 or 208-Volt. Reduce water flow rate...

Last update on 2021-04-21 / Affiliate links / Images from Amazon Product Advertising API

This Stiebel Eltron Tempra Plus water heater is one of the leading electric tankless water heater system in the market.

It’s powered by one hundred fifty amperes (A) of electricity and is eco-friendly be reducing flow rate.

The Stiebel Eltron Tempra 24 Plus will save up to 20% off the incoming water heating portion of your electric bill.

Furthermore, its Easy Setup function makes you feel at ease in installation.

Not only that, but the Stiebel Eltron Tempra 24 Plus has a sensor that measures the slightest changes in heat level.

This makes sure you receive perfectly heated water every time you use it.

The Stiebel Eltron electric tankless water heater offers advanced flow control for about five gallons.

This is enough to supply the correct amount of water heating to the entire home

This electric tankless water heater might be an ideal choice for you if you are living alone or sharing a one-bathroom apartment.

Pros & Benefits:

  • Highly durable and corrosion-resistant with its dual stainless steel build
  • Can easily be installed by a single person with its easy setup function
  • Certified energy star and eco-friendly by reducing flow rate
  • Stiebel Eltron Tempra brand

Check Price and Reviews on Amazon


3. Rheem RTEX-13 240V Heating Chamber Residential Electric Tankless Water Heater

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
  • External adjustable digital thermostatic control with LED display (+/1 degree accuracy
  • Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
  • Simple installation – 1/2 NPT adapters included; side 1/2 inch Compression water connections
  • 99.8% energy efficient. External controls to adjust temperature in increments of 1°f. Water-Saver Shower Head – 1.5...
  • Threaded for easy replacement, simple installation, digital temperature display 54 A. 13kW Model Flow Rate: up to 3.17...

Last update on 2021-04-20 / Affiliate links / Images from Amazon Product Advertising API

The Rheem RTEX-13 is great for those who want a simple whole house electric tankless water heater system that runs on electricity alone.

Rheem RTEX-13 gives you 99.8% energy efficiency with its external hot water temperature control mechanism.

Mainly due to its heating chambers, this system adjusts the inlet water temperature setting with only one-degree Fahrenheit increase.

My favorite part is that you can complete the installation process in just merely an hour.

Rheem RTEX-13 water system also has a bright LED (light-emitting diode) indicators for easy adjustments and tweaks.

Furthermore, its compact size helps save space.

The RTEX-13 unit’s magnificent gallons per minute (GPM) performance and exceptional compact build make it a wise choice for most larger households.

The Rheem RTEX-13 has a flow rate of up to 3.17 GPM, which means it’s great if you really demand hot water.

Pros & Benefits:

  • Space saver with its ultra-compact form factor, making it easy for interior design
  • Satisfactory value for tankless heaters
  • Affordable Price
  • Great for multi-unit buildings
  • Flow rate of up to 3.17 GPM
  • Unique heating chambers
  • Whole house electric tankless water system

Check Price and Reviews on Amazon


4. Bosch Tronic Thermotechnology- WH27 6000 C

Bosch Thermotechnology - WH27 Tronic 6000 C Electric Tankless Water Heater - Eliminate Time for Hot...
  • CONVENIENT TANKLESS HOT WATER HEATER: 26.9 kW tankless whole house electric water heater provides hot water when needed,...
  • EASY INSTALLATION: Can be installed virtually anywhere for commercial or residential applications
  • CONSISTENT TEMPERATURE: Polymer encased elements & built-in flow sensor ensures constant output temperature
  • STABILITY & CONTROL: External temperature control knob & superior temperature stability and control
  • GREAT EFFICIENCY: 97% thermal efficiency with minimal stand-by loss

Last update on 2021-04-21 / Affiliate links / Images from Amazon Product Advertising API

The Bosch Tronic WH27 gives you the premium performance you pay for an upscale price point.

It may cost you more than the other rival devices, but it can produce close to an endless supply of hot water at a lesser energy consumption rate.

If not for its high price, you could say that Bosch WH27 is the best whole house electric tankless water heater system on the market.

This is due to its highly efficient nature and better groundwater temperature control capabilities.

The device weighs just 20 pounds, making it easy to set up on any household wall or surface.

The bigger deal here is that with Bosch WH27 you can cut your costs up to two-thirds off your monthly hot water bill.

This is because when the hot water faucet in your kitchen is opened, cold water begins to flow into the tankless heater.

A great choice for those looking into quiet and low-profile whole house electric tankless water heaters at a low cost and self-modulating technology.

This whole house electric tankless water heater keeps up with hot water needs for the majority of households.

Pros & Benefits:

  • Fantastic manufacturer’s warranty policy
  • Has a compact and lightweight tankless heaters design
  • Does not require ventilation or external airflow
  • One of the best whole house electric tankless water heaters

Check Price and Reviews on Amazon


5. Titan SCR2 N-120 Electric Tankless Water Heater 220V

Last update on 2021-04-21 / Affiliate links / Images from Amazon Product Advertising API

The N-120 version of Titan hot water heater system outdone all of its older versions.

It is a speedy two hundred twenty volts (V) electric tankless water heater built to supply your home or office with an ample amount of hot water at a very low price tag.

Weighing only eight pounds, there is no wall or surface it cannot be installed on, and with a tan steel finish, it blends well with any room’s style.

Titan provides you up to sixty Hertz (Hz) or eleven point eight kiloWatt (kW) of extremely hot water flow rate to satisfy your demand for hot water.

What’s best is that this hot water heater will heat the water supply only when you need it, so no need to worry about your electric power usage for unnecessary heating.

I could recommend N-120 to those who need a fast solution for cutting costs and are always concerned about energy bill prices.

Pros & Benefits:

  • Can pump out 4.0 GPM even with its compact form
  • Great efficiency rating of 99.5%
  • Easy to install and looks great on walls
  • Up to 60 Hz of hot water flow rate to take care of low flow
  • Whole house electric tankless water system
  • Heats incoming water supply when you need it

Check Price and Reviews on Amazon


6. Sio Green IR260 POU Infrared Electric Tankless Water Heater

Last update on 2021-04-21 / Affiliate links / Images from Amazon Product Advertising API

This electric tankless water heater system takes the market by storm with its high-tech infrared features while saving your money on monthly utility bills.

It has models ranging from thirty amperes (A) and 3.4 kiloWatt (kW) up to eighty amperes (A) and eighteen kiloWatt (kW), which perfectly suits your household needs.

The IR260 POU also earned its place as one of the best electric tankless water heater system using innovative technology.

With its no-coil and no-metal design, maintenance and corrosion will never be a problem and for some homeowners.

The amount of energy savings are even higher each month when heating water.

The IR260 POU impressively has a compact form with less than twenty inches in length making it easy to install anywhere in the house.

If you want a reliable hot water heater that does not require a lot of energy to maintain, IR260 POU makes a great solution.

Pros & Benefits:

  • Will provide hot water only when you use it to avoid power waste
  • Offers a 100% Satisfaction Guarantee or your money back
  • Eliminates the need for quartz-based components with infrared heating

Check Price and Reviews on Amazon


7. EcoSmart Eco 27 Whole House Gas Tankless Water Heater

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EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self...
3,282 Reviews
EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self...
  • Savings of up to 50% on water heating costs. Dimensions :17H x 17W x 3.625D inches ;Pipes fittings :3/4 inch NPT
  • Digital temperature control in 1-degree increments allows control of hot water; Activation Flow: 0.3 GPM
  • Copper and stainless components designed for efficiency, durability and easy replacement.
  • Compact size saves valuable storage space, while the stylish and advanced design is pleasing to the eye and Copper and...
  • Prior to purchase & installation, please verify that this model is the right size for your hot water needs and...

Last update on 2021-04-20 / Affiliate links / Images from Amazon Product Advertising API

One of the newer natural gas tankless water heaters by EcoSmart Eco 27 is an exceedingly energy-efficient whole house electric tankless water heater best suited for a single-family household.

Unlike an electric water heater, the Ecosmart Eco 27 point of use natural gas tankless water heater.

It also has a feature that offers meticulous groundwater temperature control.

Because of this, the Eco 27 electric tankless water heater will automatically adjust the level of energy needed.

This is based on the volume of water used and the groundwater temperature you set.

Ecosmart Eco 27 gas tankless water heater claims that you can run Eco 27 up to one bathroom sink and a total of three showers at the same time having no water pressure issues.

Furthermore, this unit has a maximum activation flow rate of 6.5 GPM (gallons per minute) that can give you a satisfaction guarantee for its price.

It’s more than capable of handling a 1.5-bathroom hot water demand.

The Ecosmart Eco 27 gas tankless water heater is also equipped with auto thermal protection to intercept the hot water heaters from overloading and overheating.

Pros & Benefits:

  • With a 99% efficiency rating
  • Highly adjustable, Eco 27 electric tankless water heater allows you to specifically choose the inlet water temperatures
  • Reasonably priced and relatively low maintenance
  • Maximum activation flow rate of 6.5 GPM
  • Whole house electric tankless water heater
  • Handles 1.5-bathroom hot water demand
  • Gas tankless water heater

Check Price and Reviews on Amazon


8. Stiebel Eltron Tempra Plus 29kW Electric Tankless Water Heater

Stiebel Eltron Tempra Plus 29 kW, tankless electric water heater with Self-Modulating Power...
  • Proven reliability
  • No venting required
  • Sleek design fits anywhere
  • Save at least 15-2% on the hot water portion of your electric bill

Last update on 2021-04-21 / Affiliate links / Images from Amazon Product Advertising API

It is one of the most sought-after whole house electric tankless water heaters in the market.

It features advanced water advanced flow control exclusively to the Tempra line.

The device will make sure of sustainable temperature output, automatically adjusting the flow to lessen or even get rid of fluctuations in water temperature.

You can adjust the temperatures between eighty-six degrees up to one hundred and twenty-five degrees.

Because of the best electric tankless water heaters, you don’t have to worry about flames or fumes, unlike a gas tankless water heater.

It is pretty low in maintenance, you might forget this tankless water heater exists, for some homeowners, the energy savings are even higher each month.

I can recommend this whole house tankless water heater for larger households and if you are on a budget but need to have an upgrade.

Pros & Benefits:

  • Can lower your electric bill as much as 20%
  • Provides enough water to multiple showers at the same time
  • Whole house tankless electric water heater

Check Price and Reviews on Amazon


9. Takagi T-H3 DV-N Whole House Electric Tankless Water Heater

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per...
  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
  • Computerized safety features, No pilot light to have to worry about
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel,...

Last update on 2021-04-21 / Affiliate links / Images from Amazon Product Advertising API

T-H3-DV-N comes with computerized safety features and supplies endless hot water.

It offers a remarkable advanced flow control rate of ten GPM (gallons per minute).

This exceeds any model with its price range and is more than capable of handling a 1.5-bathroom hot water demand.

If you’re looking for a model that delivers you enough amount of water, this is the one for you and you won’t have to wait for your tank heater to heat up some more.

These electric tankless water heaters run on natural gas, making the heat exchangers and internal burners fire up once the sensor detects cold water on the pipes.

It works with a condensing heating system that doesn’t require vents due to intense fumes.

This electric water heater keeps up with hot water demands for the majority of households.

You can never go wrong with Takagi T-H3 DV-N because even if you live in a colder climate it will keep your whole house supplied with hot water.

Pros & Benefits:

  • Can work both for commercial and residential properties
  • More energy efficient compared to other types of gas tankless water heaters
  • With built-in computerized safety features so won’t have to worry about leaks and malfunctions
  • Whole house electric tankless water system

Check Price and Reviews on Amazon


10. Rinnai RUC98in Ultra Series

Rinnai RUC98iN Ultra Series Indoor Natural Gas Tankless Water Heater, Twin Pipe
  • INDOOR installation only. Fuel Type: NATURAL GAS.
  • Concentric or PVC venting option
  • Up to 0.96 Energy Factor/Up to 0.92 Uniform Energy Factor
  • The space-saving design allows Indoor Installation type
  • Ultra low NOx emissions

Last update on 2021-04-21 / Affiliate links / Images from Amazon Product Advertising API

It is the Rinnai’s newest line of electric tankless water heaters that are said to be twice as great as other models in this price range.

You can run the RUC98 in unto several water-based appliances in your homes at the same time without worrying about interruption.

This model by Rinnai is one of the gas-powered tankless water heater system and comes with digital controls located at the front panel and self modulating technology.

The digital controls allow you to adjust the gas and the temperatures and also houses the power button.

It also has lock features allowing you to lock the desired temperature settings preventing other people in the house from making their adjustments.

It also comes with a great 12-year warranty.

While not number one on this list of the best electric tankless water heater reviews, you won’t be disappointed.

Pros & Benefits:

  • Powerful enough to produce hot water to multiple showers at the same time without interruption
  • Offers 95 to 140 degrees water temperature settings higher than the average
  • Comes with a 12-year warranty

Check Price and Reviews on Amazon


Tankless Water Heater Systems Buying Guide

Even with the list I’ve provided, there are also some things you should need to consider when choosing a tankless water heater system.

Sometimes it comes down to more than just simply choosing one of the best units on the market.

Activation Flow Rates

You don’t have to worry about the electric tankless water heater tank type capacity because these models can give you an endless supply of hot water.

However, flow rate might be an issue.

You might want to focus on the activation flow rates when consider a tank water heater, especially if you are living in a larger household.

Tankless Electric Water Heater Models

I love that these systems don’t produce standby energy losses, as opposed to traditional storage heaters.

You can buy an electric water heater or a natural gas-powered tankless water heater system, but you must consider the style that would fit your household or office style.

The important thing is to think about why you need a tankless heater, an electric heater or a gas water heater.

Manufacturer’s warranty offer

One must take a look at the product’s warranty before investing in it.

Some may offer a long term warranty considering its upscale price point.

Energy efficiency or low energy cost rating

Most of us are concerned about energy costs, so it is best to look for energy efficiency ratings to ensure that you get the best deals without spending too much.

Demand for usage

You might want to ask yourself first if you want an electric tankless water heater in one bathroom or the entire household.

Type of electric tankless water heater system

Consider also the requirements, of course, you will need the proper voltage, amperage, and circuit breaker.

Location for installation

You must make sure that your heating systems will be situated not more than 50 feet from the power source, may it be on an interior or exterior surface wall.

Life expectancy

Most water heaters last for 20 years compared to storage water heaters, which makes it twice as much.

Installation process

Almost all of the manufacturers of the electric tankless water heater system offer free installment upon purchase but one must have an uncomplicated user guide.

There are indeed no perfect products and this tankless water heater system is no exception.

But you must out-weigh the downsides for its good points for you to have a comfortable life with these devices.

You might also want to consider why an electric tankless water heater system is something to look forward to than with the tank type.

Here are some comparisons as to why you need to choose the tankless one.

Tankless Electric Water Heater Vs. Storage Tank Water Heater

Even though tankless water heater system have higher purchase costs than the traditional storage-tank water heaters, it will save your money over time because of the decreasing cost in utility and energy bills.

It also has longer useful lives compared to the tank type which you need to replace more often.

If your house has restricted space, you will be in trouble finding the right place to install the tank-type water heaters because of its bulky size compared to the in-demand tankless type with a more compact build.

Moreover, the tank-type water heaters cannot be placed outside of your homes making it space-consuming.

With its adjustable systems, you can easily have hot waters only when you need it using the tankless water heaters making it more energy-efficient than the storage tank water heaters.

No need for you to wait fifteen to twenty minutes for your water to become hot as tankless water heaters give you between two to three gallons per minute.

Very unlikely to the tank-type water heaters because of the larger water volume they must heat.

However, taking showers while doing laundry at the same time can make your tankless water heater system have trouble keeping up with the demand for hot water.

Most especially, if you have multiple showers at home some might have to experience a “chilly” bath.

And if you have the tank water heater, you still need to get a larger one if you want to have multiple showers taken at the same time.

This might sound a good option to relieve the hot water shortage, but your energy bills will alarmingly increase together with the availability of hot water.

Frequently Asked Questions

What is the best electric tankless water heater on the market?

The best electric tankless water heater on the market is the Ecosmart ECO36 tankless water heater.

Since it immensely becomes popular, there are lots of arguments when you invest in electric tankless water heaters.

Are electric tankless water heaters worth it?

An electric tankless water heater is worth it if you need to save on space and live in a cold climate. Electric tankless water heaters tend to be smaller in size and those who live in winter regions.

These water heaters may cost a lot up front, but they’ll definitely save you money over the long haul.

What size tankless electric water heater do I need?

Once again, when buying an electric tankless water heater you don’t have to worry about the size or the capacity of its tank but rather you must focus on the capacity of the incoming flow rate.

Do electric tankless water heaters work in cold climates?

Electric tankless water heaters do work in cold climates, but they may take a long time to heat the water. For this reason, you may not get that endless hot water supply that you’re expecting during the wintertime.

Final Thoughts

When you have a tankless water heater system, getting your hot shower needs is not limited to the capacity of your water heater’s tank, just like what the traditional water heaters do.

But in my opinion, since it only produces hot water when you need it, generally it will save you from spending too much on your energy costs.

And given the fact that it is tankless, you need not worry ever again for leaks and other tank malfunctions.

Overall, electric tankless water heaters give a comfortable solution to your need for hot water simply because most of them are compact, safer, and easy to use.

Electric water heaters are rapidly improving, now all you have to do is to find what your household needs and works best for you.

We hope you’ve enjoyed this article on the 10 best tankless electric water heaters.

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