The 8 Best Electric Tankless Water Heaters in 2022      

The Best Electric Tankless Water Heaters

It’s snowy outside, and the temperature is below freezing. Would you prefer to go to your kitchen to heat the water for any purpose? No, right?

Electric Tankless Water Heater relieves this kind of suffering and you can get as much as warm water when you need it. As this is fully different from the traditional tank water heater, you can get warm water on your demand effortlessly.

How Does An  Electric Tankless Water Heater Work?

The way a tankless water heater works is really simple. Start by turning on the water heater and the hot water faucet at the same time. The burners ignite instantaneously as the cold water is heated in heat exchanger sensors, and the system moves into operation mode. As a result, the procedure will continue until you turn off the faucet.

Here’s a simple video that shows how a tankless water heater works after it’s been installed. It also includes a tour of the tankless water heater. So, to discover more about some of the tankless water heater’s incredible capabilities, watch the video.

Here we come up with the best electric tankless water heaters researching their technical features and reviewing customers’ user preferences.

We have emphasized on their these features to determine the best tankless water heater-

  • Self-modulating technology
  • Thermostatic temperature control
  • Upfront cost
  • Installation ease
  • Noisy or silent appliance
  • Compact design
  • Energy efficiency
  • Space saving ability
  • Flow rate             

The 8 Best Electric Tankless Water Heaters

1. Stiebel Eltron Tempra 36 Plus Tankless Water Heater

2. EcoSmart Tankless Water Heater 18 KW

3. ECOTOUCH Point-of-use Tankless Water Heater

4. Rheem RTEX-18KW Tankless Water Heater

5. Stiebel Tempra 24 Plus Tankless Water Heater

6. Rheem Performance 27KW Electric Tankless Water Heater

7. Titan Electric Tankless Water Heater

8. Bosch Electric Mini Tankless Water Heater

1. Stiebel Eltron Tempra 36 Plus Tankless Water Heater

Stiebel Eltron Tempra 36 Plus Tankless Water Heater

Product Details:

ManufacturerStibel Eltron
Power sourceBattery Power
ColourWhite
weight1 pound
StyleTempra 36 plus
KW36
Dimensions4.63 x 16.63 x 14.5 inches
Installation methodMounting
Output water temp. range86°F – 140°F
Advanced Flow Control TechnologyYes
Flow rate monitorYes
Energy efficiency99%+
SizeCompact
CertificationETL listed, CSA and ISO certified
Warranty7 years manufacturer’s warranty against leakage / 3 years against defects in workmanship & materials.
Price$842.45

Key Features:

  • It is engineered mainly for high flow rate applications.
  • As It has advanced Flow control technology, it can manage water flow when the water demand goes beyond the heater capacity.
  • Microprocessor-controlled temperature regulation helps to read and control the temperature on the LED screen.
  • True thermostatic temperature control maintains the excess heat automatically.
  • Intelligent self-modulating technology ensures energy savings constantly.
  • This is more suitable for your home because of its small and compact design besides no venting is required also.

Pros and Cons:

✔Completely a silent appliance

✔Never run out of hot water 

✔Pre set temperature button is available

✔Easy to install and use

      × Upfront cost is high

      × Not fit for old home

Consider the following points before purchasing this product:

You should consult with a professional plumber when you are setting this appliance for the first time because this is the permanent setup. Know the exact temperature rise in your region and flow rate which will be sufficient for your highest water demand.

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2. EcoSmart Tankless Water Heater 18 KW

EcoSmart Tankless Water Heater 18 KW

Product Details:

ManufacturerEcosmart
KW18
Dimensions18″ x 14″ x 3.75″ inch
Installation TypePoint-on-use
ColourWhite
Power SourceCorded Electric
Capacity2.5 gallons
Flow sensor technologySelf-modulating
Water Temperature Range80°F to 140°F
Temperature controlDigital
Energy efficiency:99.8 %
CertificationCSA and UTL listed
WarrantyLifetime
Price$402.38

Key Features:

  • Self-modulating technology modulates the energy consumption to meet the excess hot water demand.
  • The digital temperature control gives you relief from setting the temperature repeatedly. Because it has an automatically resettable thermostat feature.
  • Heat exchangers and elements ensure almost 99.8% energy efficiency.
  • The simple and compact design is easy to use and install.

Pros and Cons:

✔Plenty of hot water instantly

✔Easy to adjust

✔Energy savings

✔Space savings

      ×need to install an isolation valve

      × Scale buildup is necessary

Consider the following points before purchasing this product:

Not suitable for that region where the incoming water temperature is below 62 Degree F. Ecosmart 18 kW tankless water heater has a remote for temperature control but that is sold separately. Register the product within 30 days after purchasing for a valid warranty and tech support the product.

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3. ECOTOUCH Point-of-use Tankless Water Heater

ECOTOUCH Point-of-use Tankless Water Heater

Product details:

Manufacturer Ecotouch
StyleDigital Display
ColourWhite, Black
Flow rate1.5 GPM
Power SourceAc
KW5.5
Installation TypePoint-on-use
Flow Sensor TechnologySmart Modulation
Overheating ProtectionYes
Touch Control panelYes
Energy Efficiency 98%
Remote ControlYes(only for black model)
Price$123.99

Key Features:

  • This is innovative especially for the sink.
  • Protected from over-temperature, leakage, and dry heating as well.
  • As the water and electricity lines are separated from each other, we need to worry about safety.
  • supplies sufficient hot water instantly at your sink.
  • Smart water heating technology relieves you from checking the temperature and flow rate repeatedly.
  • It’s too easy to set up the temperature and flow rate perfectly because of the digital display and touch panel.
  • Very easy to set up in your kitchen, hospital, office, school, or any other place where a hot water supply is needed for a short period.

Pros and Cons:

✔Possible to install at any place

✔Eliminate the wastage of energy

✔compact as an oatmeal box

✔Overheat Protection

           ×Only Suitable for bathroom and kitchen sinks

          ×Not is suitable for a large family.

          ×Slightly noisy while turning the faucet.

Consider the following points before purchasing this product:

Normally you won’t get so warm water, the water that comes from the faucet remains lukewarm. If you have 5/6 members in your family, that will not be adequate to supply sufficient hot water. This heater will be best for 2/3 members of a family.

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4. Rheem RTEX-18KW Tankless Water Heater

Rheem RTEX-18KW Tankless Water Heater

Product details:

ManufacturerRheem
PerformanceOn-demand, consistent
KW18
Fuel typeElectric
Highest Temperature Rise4.4 GPM
digital thermostatic controlyes(external)
Flow Sensor TechnologyAdvanced self-modulation
Installation TypeEasy
Power adjustingYes
Energy efficiency99.8%
Mounting locationwall
Energy staryes
Price$426.32

Key features:

  • It can maintain the temperature automatically besides controlling the temperature at a constant level because of its digital thermostatic control feature.
  • As it has two copper immersion heating elements that can hold durability.
  • Self-modulation technology ensures the proper balance between temperature rise and flow rate.
  • The highest flow rate 4.4 GPM meets the demand for hot water instantly.
  • Simple installation minimizes your labor cost.

Pros and cons:

✔Easy replacement

✔LED display

✔Use the power that you need to heat the water. 

✔No venting required

✔Optimized operation

           × Can’t be used in a recirculated system.

           ×Flame or ignition failure for sometimes

Consider the following points before purchasing this product:

Electrical Plugs are only designated for us, if you stay apart from the US then you might need any adaptor to use this heater. So check the product’s compatibility before purchasing. Most of the customers are so impressed with its amazing performance.

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5. Stiebel Tempra 24 Plus Tankless Water Heater

Stiebel Tempra 24 Plus Tankless Water Heater

Product Details:

ManufacturerStiebel Eltron
Power sourceBattery powered
KW24
Flow control technologyadvanced
Digital Temperature DisplayYes
Preset Temperature buttonYes
Output water temperature  range86°F – 140°F
Savings and Water Flow MonitorYes
Self-modulating technologyyes
Installation typemounting
Warranty7 years on leakage and 3 years on parts
Price$699.00

Key Features:

  • Advanced Flow control technology maintains the water flow constantly.
  • It is completely a noise-free application.
  • The small and sleek design saves space in your home.
  • Easy to operate because of the digital display, preset temperature, and memory button.
  • No venting is required.
  • An eco-friendly unit helps to save energy with self-modulation technology.
  • You can see your energy cost and how much you save energy as well.
  • No need to rush out of hot water.

Pros and cons:

✔Can reduce the flow instantly if hot water demand increases.

✔Energy saver

✔Solid copper heating system

✔Highest standard for reliability

           × Isolation valve can’t be got with heater, you have to buy it separately.

Consider the following points before purchasing this product:

If you have a high water demand in your family, don’t choose this. Consult with an expert plumber while setting up the heater, because this is the permanent fitting.

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6. Rheem Performance 27KW Electric Tankless Water Heater

Rheem Performance 27KW Electric Tankless Water Heater

Product details:

Manufacturer‎Ecosmart US
Power sourceBattery powered
Digital displayYes
KW27
Flow sensor technologySelf-modulation 
Highest flow rate5.3 GPM
MountingWall or under sink
Energy efficiency 99.98%
Warranty5 years on heating elements and 1 year on parts.
Price$620

Key Features:

  • Advanced Self modulating technology maintains the proper temperature.
  • On-demand hot water supplies sufficient water demand.
  • Robust copper immersion heating elements increase the durability of the heater.
  • Eco-friendly features save energy.
  • Digital temperature displays help to see the flow rate and temperature rise at a time.
  • Very simple to install.
  • Compact and sleek design

Pros and cons:

✔Durable

✔Dial control digital display

✔Energy efficient

           × Underpowered for whole home use

Consider the following points before purchasing this product:

Choose the perfect place to mount this heater besides choosing the right size for your home otherwise you will get trouble installing and operating it.

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7. Titan Electric Tankless Water Heater

Titan Electric Tankless Water Heater

Product details:

manufacturer‎Niagara Industries Inc
ModelN 270
materialtitanium
KW27
Power sourceBattery powered
Mounting systemWall, under sink
Water Temperature Range:110°F to 120°F
Max Flow rate4GPM
Digital temperature controlyes
Energy efficiency99.95%
Resettable thermostatManual
Warranty10 years on casing leakage,1 year on parts
Price$ 495.00

Key Features:

  •  Copper-brass inner casing helps to increase durability.
  • Thermostatically temperature control maintains the temperature 
  • On-demand water control 
  • Suitable for a large family if the temperature remains moderate.
  • Space saver
  • A sediment filter is also present
  • Ease of installation

Pros and cons:

✔Step-by-step guidelines help to install the heater on its own.

✔Energy efficient

✔Reliable and affordable

           × Hard to replace the system

Consider the following points before purchasing this product:

Titan has 2 tankless water heaters, one is N120 and another one is N 270. N 120 isn’t suitable for a large family, N270 is recommended for a large family for its advanced features. As this heater is assembled in the UK, so you can keep faith in its unit and performance.

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8. Bosch Electric Mini Tankless Water Heater

Bosch Electric Mini Tankless Water Heater

Product details:

Manufacturer‎Bosch Thermotechnology Corporation
Power source Battery powered
Wattage1400 watts
Capacity7 gallon 
Temperature range65-145°F
Installation typePoint-of-use
Thermal efficiency98%
CFC free foam insulationPresent
Mounting systemWall, floor, or shelf
Warranty6 years on unit and 2 years on parts
Price$277.26

Key features:

  • A 7-gallon water heater meets the hot water demand and perfectly suits under the sink.
  • It can be mounted on the wall, sink or floor easily besides setting it up horizontally.
  • Saves more energy than conventional water heater cause it is CFC-free foam insulation 
  • Sleek and attractive design
  • A glass line tank improves its durability
  • If the temperature rises above  190 °F then automatically temperature control shuts off the device.
  • Temperature and pressure relief valves prolong reliability and safety.

Pros and cons:

      ✔Endless hot water supply

      ✔Fits in a small place 

      ✔External dial permits to control of the temperature from outside easily.

      × Not suitable for shower, bath, or dishwasher together

      × Thread connection isn’t so improved

Consider the following points before purchasing this product:

No drain is available in it.

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The buying guidelines: 

Which size tankless water heater do you need or How to choose the right size water heater for your home?  

  • According to Your Family Member:
Family of 2 members6-8 GPM
Family of 3 members7-9 GPM
Family of 4 members8-10 GPM
Family of 5 members 9-11 GPM
Family of 6 members11+ GPM
  • According to the Temperature Rise:

Before setting up a tankless water heater you need to know about the average temperature of your region. Temperature rise is the difference between winter, groundwater, and the preferred temperature you are going to set up at your home. To know the exact temperature of your tankless water heater, you should check the highest temperature of the groundwater in winter.

  •  According to the highest water demand:

Usually, you need only one tankless water heater in your home. Family members should come first, followed by the water use that is most prevalent throughout the entire house. You may need a lot of water at any occasion or any particular event. So choose sensibly before you are spending a lot of money on installing a water heater permanently.

How to install a tankless water heater?

Correct Installation of a tankless water heater is very important because without a professional plumber it becomes much riskier. First of all, we need to follow manual guidelines for starting the installation process. Then buy the necessary tools that will be needed in the installation process.

Here’s one video of installing an electric tankless water heater, in this video the plumber has described upfront cost, wiring instructions, shark bite fittings, breaker settings, etc so accurately. Check out the video to get a clear concept about the installation of a tankless water heater.

Difference Between Storage Tank Water Heater and Electric Tankless Water Heater:

Storage Tank Water HeaterElectric Tankless Water Heater
Tanks store up to 40-60 gallons of water.No need to store water.
Large and capable of providing hot water for a variety of uses.Small in size and take a little space in your home.
Stored water is heated to a prior set temperature and can be used when needed.This is the on-demand water heater, you can get warm water just by turning on the faucet.
Usually powered by Natural gas.It is powered by gas or electricity.
It is easier to operate than the tankless system.This is a little bit tricky as advanced technology has been used.
A tank-style water heater powered by gas uses approximately half as much energy as a tankless water heater powered by electricity..  A Tankless water heater that is 34% energy efficient.
It has a release valve that saves you from exceeding temperature and pressure.No Release valve is present.
Not as expensive as a tankless water heater, installation and repairing cost is minimal.Much more expensive than a storage-tank water heater, installation and repair cost is too high.
The average lifespan is about 10-15 years.The average life span is almost 20+ years.

Advantages of an electric tankless water heater:

  • Space saver
  • Long life span
  • Energy-efficient
  • On-demand water
  • Instant hot water
  • Endless hot water supply
  • No need to worry about the tank exploding
  • No need to be concerned about burning yourself with extremely hot water.
  • Less maintenance is enough
  • Environment-friendly

Downsides of electric tankless water heater:

  • Upfront and installation cost is so high
  • the Cold water sandwich effect
  • Incompatible to hold the even temperature when multiple faucets are used at a time.
  • Hard to get lukewarm water.
  • No availability of hot water during electricity outages. 

Our Recommendation for you:

If you have a large family who needs hot water frequently, the Stiebel Eltron Tempra 36 Plus Tankless Water Heater is the perfect choice for you. On the other hand, if you think that you need hot water in your sink or dishwasher then it will be your perfect choice at an affordable price.

Stiebel Eltron Tempra 36 Plus Tankless Water Heater
Stiebel Eltron Tempra 36 Plus Tankless Water Heater

Bottomline:

Though the upfront and installation cost of an electric tankless water heater is so high, the energy and cost savings features will amaze you. The life expectancy of a tankless water heater is over 20 years. So If you’re considering replacing your conventional gas water heater or tank-style water heater, switching to a tankless water heater or installing a tankless heater will be the appropriate choice to provide an unending supply of hot water. 

Frequently asked questions(FAQs):

Q. What is an Electric Tankless Water Heater?

A. Electric Tankless Water Heater is used to heat water simultaneously. When the faucet is turned on the cold water instantly starts to warm as the operating system is being started. You can simply stop the water flow by just shutting off the faucet.

Q. How much does a tankless water heater cost?

A. Before installation of the tankless water heater, the initial cost will be around $300 to $ 3100. The installation cost will be around $6000 on average worldwide.

Q. What are the types of water heaters?

A. Types of Water Heater:

  • Tankless Water Heater
  • Conventional Water Heater
  • Solar-powered Water Heater
  • Condensing Water Heater
  • Heat Pump Water Heater
  • Combined Space & Water Heating System
  • Segregated heating system with hydronic boilers
  • Point of use Water Heater
  • Smart Water Heater

Q. Which electric tankless water heater is more affordable?

A.  ECO TOUCH Point-of-use Tankless Water Heater is the best heater at a reasonable price if you wanna use hot water at your sink only, however, if you need an endless hot water supply at your sink, bathroom, or kitchen then Rheem RTEX-18KW Tankless Water Heater is the perfect choice for you.

Q. Is it worth installing a tankless water heater at my home?

A.  Of course! Though the upfront cost is so high, the way it saves power cost is really so satisfying. The energy efficiency level is also so good. An electric tankless water heater has a 20-year lifespan on average. Therefore you can use it for a long period without any hassle.

Q. Which brand is the best for buying a tankless water heater?

A. Stibel Eltron is the most reliable brand to buy an electric tankless water heater. 

Q. How energy efficient an electric tankless water heater is?

A.  An electric tankless water heater is almost 99% energy efficient. 

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