Best Electric Tankless Water Heater Reviews 2019!

Electric Tankless Water Heaters

Does the freezing cold weather prevents you from indulging in a long and relaxing bath? Do you wish to escape the lowest temperatures when you go to take a shower? All of us know how peaceful it feels when you step into a bathtub full of hot water after a long and tiring day at work.

This is where the new age electric tankless water heater comes into play. From providing you with instant hot water as soon as you open your faucet, to a compact and energy efficient design. These tankless water heaters solve all your hot water problems, making your daily routine easy, less time consuming and more convenient. Here are the top picks!

Best Electric Tankless Water Heater in 2019

Below are the reviews of 10 best electric tankless water heaters in 2019. We have mentioned the product features and listed out pros and cons to let you know everything in detail.

1.  Stiebel Eltron Tempra Plus 24kW Electric Tankless Water Heater


Advanced Flow Control Technology

This Tempra Plus model has a German patented Advanced Flow Control technology that automatically reduces output flow to maintain the temperature ensuring a constant supply of hot water.

Digital Display

This unit comes with a high-resolution digital display, allowing you to monitor the changes in temperature with ease.

Dynamic Design

It has a compact and dynamic design which makes it fit to be installed at any place you want. It also occupies much lesser space than any other conventional model, making it a perfect small electric water heater.

Reduced Energy Usage

This model minimizes the energy consumption up to 20% when compared to the standard tank type, and due to the on-demand heating, standby heat loss is eliminated, making its energy efficiency close to 100%.

  • Doesn’t take up huge space
  • Provides savings on electricity bills
  • Easy to use and allows precise adjustment of temperature
  • Quiet working condition
  • Difficult to install this water heater yourself as it requires heavy duty wiring
  • Needs a 240v power supply


2.  EcoSmart ECO 27 Electric Tankless Water Heater Review

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology
2,421 Reviews
EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology
  • 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


Digital Control Panel

This model comes with a digital control panel which allows you to adjust the temperature of the water output in 1-degree increments, giving precise control.

Saves 50% Heating Cost

Coming with a self-modulating flow sensor technology, this model heats the water only when it senses a flow, which in turn saves electricity consumption 50 times more than any normal water heater.

Best Electric Tankless Water Heaters

80-140 Degree F Temperature Range

In areas where the incoming water temperature can drop to 37 degrees Fahrenheit, the Eco 27 can heat up to 3 gallons of water per minute (GPM) which should accommodate up to 2 of your family members showering at the same time without running out of hot water.

  • Saves 50% water heating cost
  • Endless hot water supply even in cold climates
  • Easily replaceable heating elements
  • Can’t pipe hot water at high flow rates
  • Strict policy of warranty


3.  Rheem 240V 2 Heating Chambers RTEX-13 Residential Tankless Water Heater

Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY
51 Reviews
Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY
  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand


Thermostatic Control

It comes with an external thermostatic control which is adjustable with raises of 1 degree Fahrenheit range. It also has a stylish design with digital LED display.

Durable Heating Elements

It has long-lasting copper immersion elements and self-modulating power control with a serviceable field.

Short Waiting Time

This unit heats the water so instantly that it does not take even a minute for hot water to come out of your faucet or shower.

Small Flow Rate

With a flow rate of 4 gallons per minute (GPM), this unit makes it perfect for a small house or a studio apartment with limited people, as they can enjoy endless hot water.

Energy Efficient

This heater is 99.8% energy efficient and also comes with a budget-friendly price.

Easy installation

The multiple stranded wire makes its installation much easier and it takes approximately an hour to install it completely.

  • User-friendly
  • Budget-friendly
  • Great for a small house
  • Energy-efficient
  • Easy installation
  • Not suitable for a big family, as it supports only one shower-head or a faucet at a time.


4.  EcoSmart ECO 11 Electric Tankless Water Heater Reviews

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
2,421 Reviews
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
  • Lifetime warranty
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater


Constant Hot Water Supply

This unit heats water up to 105 degrees Fahrenheit and is most suitable for areas with incoming water temperatures above 67 degrees.

Small Size

This is a small electric water heater, and it can fit easily in your cabinet or can be mounted on any wall. It won’t take up huge spaces.

Easy Installation and use

In order to install this heater, all you need is a 60 Amp power supply and a #6 copper gauge wire. The automatic and resettable thermostat makes it easier to use as well.

Lifetime Warranty

The manufacturer offers a lifetime warranty for all EcoSmart electric tankless water heaters, which covers the electronic elements, and the heat exchanger on the water heater. Please keep in mind that this warranty is provided only for the water heaters which are used for residential purposes and are installed by a licensed professional.

  • Compact size
  • Consistent hot water
  • Easy installation and use
  • Energy efficient
  • Lifetime warranty
  • The flow rate has to be lower in colder climates to ensure constant hot water supply especially with more than one pipe running.
  • In order to get a lifetime warranty, the unit must be installed by a licensed professional.


5.  Titan SCR2 N-120 Tankless Electric Water Heater Review


Hard Water Resistance

Many good brands cannot deal with hard water condition and often breakdown, but this unit is hard enough to deal with it.

Self-Modulating Flow Sensor Technology

This model heats water only when it senses flow and has a minimum of 0.5 GPM of flow rate. Thus it adjusts power consumption in harmony with the hot water demand making it smart and cost-effective.

10 Year Warranty

This unit has a 10-year warranty on the water carrying component and a 1-year warranty on other components which makes it a safer choice in the long run.

  • Works on hard water
  • A great deal of warranty
  • Compact size
  • Cost effective and energy efficient
  • Quick and easy installation
  • High inlet water temperature makes it almost useless in colder climates
  • For colder countries, the heating may take a bit longer as compared to the warmer countries


6.  Eemax EEM24018 Tankless Water Heater

Eemax EEM24018 Electric Tankless Water Heater, Blue
36 Reviews
Eemax EEM24018 Electric Tankless Water Heater, Blue
  • Tankless water heaters provide a continuous Supply of hot water and only heats the water you need, when you need it
  • Instant, consistent and endless hot water


Easy Installation

The 3-foot electric cable and ½” CF water connectors make the installation of this water heater easier.

Durable and Easily Replaceable Components

Copper immersion heating elements with brass top increase the durability of the water heater and they are threaded for easy replacement as well.

Compact and Stylish

This model is compact in size and looks stylish which allows it to fit well at any place in your house. It is also resistant enough with digital temperature control in increments of 1 degree Fahrenheit ranging from 80 to 140 degrees Fahrenheit.

Can run 3 things simultaneously

This water heater produces hot water for running 3 things simultaneously, depending on the climate.

  • Self-modulating technology
  • Compact and stylish design
  • Easy to use and install
  • Cost-saving and energy efficient
  • Endless supply of hot water
  • May show some amount of sensitivity to flow rate and water temperature depending on whether you live in a colder or warmer climate.


7.  Marey ECO150 Tankless Water Heater with Smart Technology

Marey ECO150 220V/240V-14.6kW Tankless Water Heater with Smart Technology, Small, White
33 Reviews
Marey ECO150 220V/240V-14.6kW Tankless Water Heater with Smart Technology, Small, White
  • Unit requires 220v~240v and (1) 70 amp double pole breaker
  • ETL approved


Smart Technology

This water heater comes with an LCD display panel allowing you to set the exact desired water temperature thereby optimizing energy consumption.

Stylish and Compact

It supports two faucets or one shower at the same time, while occupying little space and looking stylish at the same time.

Corrosion Resistant Elements

It includes a German-designed and patented heating element with a stainless steel water channel, making it highly corrosion resistant and it is also able to eliminate hard water.

Easy Installation

Its installation is pretty easy and you can use it for indoor point of use as well as outdoor travel use since it is extremely lightweight, weighing only 10.1 pounds.

  • Easy to use
  • Stylish, compact and lightweight
  • Corrosion resistant elements
  • Can eliminate hard water
  • Easy installation
  • Less energy consumption
  • Not suitable for whole house use


8.  Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8)

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8)  - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted
1,131 Reviews
Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted
  • CONVENIENT HOT WATER HEATER: 7 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 17.5 W x 17.5 H x 14.5 D Inches
  • INSTALLED VERTICALLY OR HORIZONTALLY: This larger model can be mounted vertically (7 gal. of water supply) or horizontally (5.1 gal. of water supply)- vertical orientation is installed with the cold and hot lines on top of the unit


Fits right under your sink

This 7 Gallon mini tank fits right under your sink where you need it.

2-year Warranty

You get a 2-year warranty on its components.

Glass lined tank

It has a glass lined tank which offers great insulation, with 94% thermal efficiency and prevents rusting.

Compact design

It comes with a compact, lightweight and space-saving design which makes it easier to be installed in small spaces. It can be mounted on the wall either vertically or horizontally.

Temperature and Pressure relief valve

It comes with a temperature and pressure relief valve which enhances the safety this water heater provides you with.

  • Compact, lightweight and space-saving
  • 2-year warranty on its parts
  • Glass lined tank for better insulation
  • Temperature and pressure relief valve for enhanced safety
  • Vertical or horizontal mounting options
  • Not able to provide continuous hot water due to small tank size
  • Since it needs to be hard-wired into the house’s electrical system, an experienced professional is required for installation.


9.  iHeat Tankless S-14 Tankless Water Heater

iHeat Tankless S-12 240V 54A 12KW Stainless Steel Enclosure 7.2' by 11' by 3' 1/2'CPT 36' AWG#6 Electric Water Heater, 7.5 lb
38 Reviews
iHeat Tankless S-12 240V 54A 12KW Stainless Steel Enclosure 7.2" by 11" by 3" 1/2"CPT 36' AWG#6 Electric Water Heater, 7.5 lb
  • The heat tank less stainless Steel construction is a perfect fit for any applications near the ocean, like beach front properties, yachts, small boats, resorts and outdoor kitchens
  • Heat tank less s series can also be used in highly sterile applications like commercial kitchens, hospitals, clinics, and even schools where cleanliness is of the highest importance


ixp-4 Water Proof construction

This water heater is manufactured in complete stainless steel promising an ixp-4 waterproof construction.

Can be used in highly sterile locations

It can be used in highly sterile applications as well such as commercial kitchens, hospitals, clinics and even schools where cleanliness is of the highest importance.

Waterproof interactive touchpad

Waterproof construction enables you to easily control the temperature using the waterproof interactive touchpad this model provides you with.

3 GPM heating capacity

This heater provides a 3 GPM heating capacity which is equivalent to 2 showers at 1.5 GPM each, or 1 shower and 3 sinks at 0.50 GPM each simultaneously, or any combination which equals to 3.0 GPM.

  • Waterproof construction
  • Can be used in highly sterile applications
  • 60% saving on water heating costs
  • 3 GPM heating capacity
  • Heats up water quickly and provides unlimited hot water
  • In colder climates, it heats a lesser volume of water which causes it to be used in point of use applications.


10. Bosch Tronic 6000 C Series Tankless Electric Water Heater

Bosch Electric Tankless Water Heater - Eliminate Time for Hot Water - Easy Installation
195 Reviews
Bosch Electric Tankless Water Heater - Eliminate Time for Hot Water - Easy Installation
  • CONVENIENT TANKLESS HOT WATER HEATER: 26.9 kW tankless whole house electric water heater provides hot water when needed, for as long as needed
  • EASY INSTALLATION: Can be installed virtually anywhere for commercial or residential applications


Convenient whole home water heater

This 26.9kW electric tankless water heater provides hot water when needed, for as long as needed instantly.

Can be used for both commercial and residential purposes

This water heater can be installed anywhere, indoors or outdoors for commercial or residential purposes.

Consistent temperature

This model comes with polymer encased elements and a built-in flow sensor which ensures constant output temperature even for 1-3 major applications at a time, even during peak use.

External temperature control knob

External temperature control knob provides temperature control and stability.

  • Whole house water heater
  • On-demand hot water
  • Constant output temperature
  • Temperature control knob
  • 20+ years life expectancy
  • Needs to be hard wired in the house’s electrical system and thus requires installation by a professional.


What is an Electric Tankless Water Heater?

As the name suggests, they are water heating machines powered by electricity which do not use a tank to store water each time you switch them on.

Also, as we all know how important it is becoming to minimize the use of any product which causes harm to the environment, these Electric Tankless Water Heaters are an eco-friendly solution! Since they do not require any ventilation facilities unlike the gas water heaters, no greenhouse gases such as carbon dioxide are emitted.

Types of Electric Tankless Water Heaters

If you are confused regarding which type of electric tankless water heater works for you, here we have divided them into three different categories to help you understand the different types of electric tankless water heaters available for your house:

Electric Tankless Water Heater Reviews

1. Whole House Electric Tankless Water Heaters

As the name suggests, these water heaters are meant to be sufficient for the needs of a whole house. If you have a house in which two bathrooms are used at the same time, while dishes are being washed in the dishwasher or clothes are being washed in the washing machine; you should opt for a whole house electric tankless water heater with 5 GPM to 8 GPM of flow rate, as it would meet the hot water demands of your entire house.

Also, depending on the size of your house, you can choose a large flow or a small flow type electric tankless water heater. If you have a house with three or four bathrooms, large flow type works the best for you; and if you have a small house with a single bathroom, a small flow type should be your pick.

2. Portable Electric Tankless Water Heaters

When looking for a water heater which you can carry anywhere with you easily while going out for camping or traveling, you should go for a portable electric tankless water heater which is lightweight and has a small flow rate making it easier to carry and can be even used on an RV (recreational vehicle). Thus, if you are a camper and you want an electric tankless water heater which can be conveniently carried along on any journey, look for a portable electric tankless water heater.

3. Outdoor Electric Tankless Water Heaters

These tankless water heaters are installed outdoors i.e. on the outside wall of the bathroom. Since they are installed outdoors, they are equipped with freeze protection system which protects the machine from being frozen during bad weather. Some of them also come with an enclosure such as the rain cap, in order to prolong their service life. The benefit that these electric tankless water heaters provide is that they don’t take up any space inside your house.

Electric Tankless Water Heater Costs

If you decide to buy an electric tankless water heater for your house, what are the costs it will incur?

Electric Tankless Water Heater Installation, MaintenanceCost and Buyer Guide 2019

1. Operational Costs

Basically, electric tankless water heaters are extremely low on operational costs. Since they work on the on-demand water heating principle, they save a lot of energy and ultimately a lot of money. Unlike the traditional tank water heaters which heat the water on standby. Thus you save a lot of money on the electricity bills by installing an electric tankless water heater.

2. Maintenance Costs

The traditional water heaters require a lot of maintenance despite having a lower lifespan. Also, they have to be completely replaced in case of any failure. But the electric tankless water heaters solve both these problems. They have a much longer lifespan. And although they require maintenance, most of them come with a warranty in case of any breakdown. The spare parts of these electric tankless water heaters are easily available and thus they can be easily replaced.

Electric vs. Gas Tankless Water Heaters

Let us now look at the major differences between an electric and a gas tankless water heater.

#1. Efficiency

The efficiency of a gas tankless water heater peaks at 80-85%, whereas electric tankless water heaters are 98+% efficient. This makes electric tankless water heaters more efficient than the gas models.

#2. Operating Cost

Generally, both electric and gas tankless water heaters cost approximately the same to operate, especially when you consider the recommended annual maintenance that gas appliances require. This will also depend on the cost of electricity and natural gas in your area since there are many regions where natural gas costs are extremely high due to lack of supply in the region. Thus, in such areas, an electric unit is significantly cheaper to operate.

Electric Vs Gas Tankless Water Heater

Moreover, prices of natural gas tend to fluctuate more dramatically than the prices of electricity and most of the economists agree that gas prices are expected to rise significantly in the coming years, whereas in most of the areas, electricity prices should be relatively stable or rise at a much slower pace. But you should also remember that electric tankless water heaters are more energy efficient, so much of the cost difference between the fuels will be nullified.

#3. Prices, Installation and Maintenance

When talking about initial product costs, electric tankless water heaters cost significantly less than the gas models.

Gas tankless water heaters have a complex venting and combustion air supply requirement, especially when installed in a confined space. Also because of their high gas consumption, the existing ventilation systems are rarely adequate. All of this can make their installation expensive. Electric tankless water heaters are quite small and do not require ventilation of any exhaust gases. Therefore, the installation of an electric tankless water heater is generally much cheaper than that of a gas tankless water heater.

Gas tankless heaters need to be inspected annually by a trained technician to ensure safe fuel combustion and performance and are often difficult to service because of their complex fuel controls and heat exchangers. Whereas, electric water heaters require very less maintenance, are simpler to troubleshoot, diagnose, and repair.

#4. Environmental Impact

Gas tankless water heaters emit greenhouse gases and increase the reliance on fossil fuels, whereas electric tankless heaters do not emit any greenhouse gases and their compact size also minimizes the environmental footprint in manufacturing and ultimate disposal. Thus, electric tankless water heaters are more environment-friendly than gas tankless heaters.

Electric vs. Propane Tankless Water Heater

Propane is another gas which is used as fuel. This makes propane tankless water heaters almost the same as natural gas tankless water heaters. Therefore, all the differences between the electric and gas tankless water heaters also make the differences between the electric and propane tankless water heaters.

Pros and Cons of an Electric Tankless Water Heater

Pros and Cons of Electric Tankless Water Heater with Ratings


  • Most of the electric tankless water heaters are 98+% energy efficient.
  • These tankless water heaters are safe to operate.
  • Since they do not emit any greenhouse gases, they are environment-friendly as well.
  • Most of the electric tankless water heaters are compact in size and thus they save a lot of space.
  • Most models come with a digital display which makes them easier to be used by everyone.
  • The on-demand water heating technology which they use saves a lot of time and energy.
  • The electric tankless water heaters are easy to maintain as they have parts which are easily replaceable and often come with a warranty as well.
  • They have a life expectancy of more than 20 years.


  • Since these water heaters are powered by electricity, they are susceptible to power outages. So you won’t have access to hot water in case of bad weather, storms, etc. whenever your power is out.
  • The initial cost incurred while the installation of an electric tankless water heater may be higher than that of other types of tankless water heaters.
  • These water heaters may not be able to provide enough hot water for an entire household or for multiple purposes at the same time. However, you can purchase a larger unit, but again, the costs would be increased.

Buying Guide: How to Choose the Best Tankless Electric Water Heater?

With all the information we provided you with, we hope that it became easier for you to narrow down your choice of the best water heater available in the market. However, each household has a different set of requirements and thus choosing a water heater which suits all the needs of your house becomes important. This is why we have laid out this perfect buying guide so that you can choose the best water heater according to your unique set of requirements. We have answered all the basic questions which must come to your mind while looking for buying an electric tankless water heater.

#1. Is it really worthwhile?

There are indeed enough reasons which make purchasing an electric tankless water heater worthwhile. With the number of advantages it has over any other water heater, is it even a valid question?

#2. What factors to keep in mind?

Some of the factors that you should keep in mind while buying it are-

  • Flow-Rate

Since these water heaters are tankless, you need not worry about the size or capacity of the tank, but you must estimate the amount of water you require for your daily use. Accordingly, you must choose a model with a suitable flow rate. For instance, a dishwasher requires 1-2.5 GPM of water, while a bathroom faucet requires 1.5 GPM of water. Therefore, you need to choose the model with a flow rate which matches your water usage needs.

  • Size

Depending upon the area in which you need to install your water heater, you must choose a model which is sized accordingly. If the area is small, you need to choose a model which is compact in size.

  • Energy Efficiency

There are models of water heaters which come with high energy efficiency percentages, and some are also equipped with condensing technology. So you must take a look at all the features a particular model promises to be equipped with.

  • Location of your House

The location of your house is an important factor to consider before buying any water heater. If you live in the southern part or the warm areas, you can choose the unit according to the exact flow rates, but if you live in colder climates, remember that the flow rate tends to lower down to 2-3 GPM. So you will have to choose a unit with a higher flow rate.

  • Price

One must always consider the price before buying anything. But this should not always be the primary concern. You must keep in mind your budget, but you should avoid buying the low priced, inferior quality water heaters as it risks the safety, performance and durability of the equipment.

  • Warranty

Before you purchase any model of water heater, make sure you know about the details regarding its warranty period and maintenance services.


We hope that we have done our best to provide you reviews of electric tankless water heaters, and now you know for sure which one suits your household needs. So what keeps you waiting? Get one of these best tankless electric water heater right now!

Last update on 2019-07-19 / Affiliate links / Images from Amazon Product Advertising API

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