11 Best Electric Tankless Water Heaters For Your Home In 2024

The idea that you can carry your water heater anywhere may seem wild, but the best tankless water heaters are designed to be easily portable. Due to the lack of a storage tank, they are compact and quick to heat, and you can carry them on trips and enjoy a hot, refreshing shower anytime, anywhere.

A tankless water heater is easy on the pocket and much more energy-efficient than conventional water heaters, thus making them an excellent option during the winters. Keep scrolling as we have listed the top professional-grade tankless water heaters with superior heating capacities that are worth every penny and give you a few tips on choosing the perfect one.

In This Article

11 Best Tankless Water Heater

1. Best Durable:Ecosmart ECO 18 Electric Tankless Water Heater

The Ecosmart electric tankless water heater will never let you run out of hot water when used correctly. It has a stylish appearance and does not take up much space, and can be mounted on the wall. The unit weighs 14 pounds and measures 3.63x14x17 inches. Compared to traditional tanks, it is 90% smaller and has highly advanced self-modulating technology. It uses energy to heat the incoming water only when needed, and thus, can save time and up to 50% of your hot water bill. If you want to find out more about this product and its usage, make sure to check out this review on YouTube.

Color: White | Product Dimensions: ‎3.63 x 14 x 17 inches | Item Weight: ‎14 pounds | Material: ‎Plastic

Pros

  • Field replaceable elements
  • Lifetime warranty for residential use
  • Simple operation
  • Tested and certified by NSF
  • Highly durable

Cons

  • May not have remote temperature control 

2. Best Anti-Freezing Protection:Camplux Tankless Water Heater

4.3
Camplux Tankless Water Heater Image: Camplux

The expert-approved Camplux tankless water heater has an oxygen-depletion sensor protection function and energy-saving technology, making it suitable for use in a well-ventilated room. It has a compact structure and a foldable handle, so it can be used outdoors too.

The maximum power output is 28,000 Btu/hour, the propane gas pressure is 0.4psi, and offers an output of 1.32 gallons/minute of hot water. The device weighs 14.08lb and measures 11.42×4.33×14.8 inches. If you need further convincing, check this YouTuber’s review out.

Product Dimensions: ‎12.8 x 6.1 x 21.65 inches | Item Weight: ‎23.4 pounds | Material: ‎Iron,Metal,Copper | Wattage: ‎20 KW | Color: ‎White

Pros

  • Anti-freezing protection
  • Energy saving
  • Easy to use
  • Simple installation
  • Approved by CSA 

Cons

  • May overheat, causing a fire
protip_icon Point to consider
On average, most gas-fueled tankless water heaters generate higher hot water flow rates than their electric counterparts (1).

3. Best Easy-To-Install:Rinnai Tankless Water Heater

Why We Think It's Worth Buying

The 362 reviews on Amazon indicate that this product has a loyal following.

The Rinnai tankless water heater, a trusted product, with ThermaCirc360 technology recirculates water through your pipeline to quickly deliver hot water. The heater is designed to optimize energy usage and conserve water, playing a significant role in the sustainable reliability mechanism. The average service life of Rinnai tankless water heater is 20 years. It weighs 45.6 pounds, and the overall dimensions are 14.04×9.27×26.9 inches. Check out the review of this product on YouTube to know why it is one of the best out there.

Product Dimensions: ‎17.5 x 30 x 13 inches | Item Weight: ‎45.6 pounds | Color: ‎V65iN - Natural Gas/6.5 GPM

Pros

Cons

  • May require a venting system 
Ecosmart ECO 18 Electric Tankless Water Heater
Best Durable
Camplux Tankless Water Heater
Best Anti-Freezing Protection
Rinnai Tankless Water Heater (Rinnani or Rinnai?)
Best Easy-To-Install
Color White ‎White ‎V65iN - Natural Gas/6.5 GPM
Dimensions ‎3.63 x 14 x 17 inches ‎12.8 x 6.1 x 21.65 inches ‎17.5 x 30 x 13 inches
Weight ‎14 pounds ‎23.4 pounds ‎45.6 pounds
Material ‎Plastic ‎Iron,Metal,Copper-
Wattage- ‎20 KW-
Rating
Reviews4,370203362
Price$429.74$269.99$757.48

4. Best For Silent Operation:Stiebel Eltron Tankless Water Heater

4.5

Why We Think It's Worth Buying

About 1,390 reviewers on Amazon have given their seal of approval to the product.

Stiebel Eltron tankless electric water heater has advanced flow control German patented technology, preventing water temperature fluctuations and bringing endless comfort. Compared to traditional water heaters, it saves up to 20% of electricity. It also has a digital display to provide an accurate temperature reading and is known for its highest standards and reliability. 

Wattage: 18000 watts | Color: White | Product Dimensions: ‎4.63 x 16.63 x 14.5 inches | Item Weight: ‎0.01 ounces |Material: ‎Copper | Wattage: ‎18000 watts

Pros

  • Prevents irregular temperature rise and fall
  • Small and compact
  • Silent operation
  • Easy to install
  • Endless hot water 

Cons

  • May not have an installation kit

5. Best Energy Efficient:Ecotouch Electric Tankless Water Heater

The tried- and -tested Ecotouch tankless electric water heater has a self-adjusting control function, which can maintain a stable temperature outlet, ensuring the best energy efficiency of about 98%. The electric heater also has a digital display and touch control panel to make temperature setting easy.

This is suitable for colder climates as you don’t need to wait for the cold water to heat because it can continuously provide hot water of 110°F or higher within a few seconds. For safety, the internal water and electricity lines have been kept separate, thus preventing leakage or accumulation risk and enhancing longevity.

Wattage: 6500 watts | Product Dimensions: ‎15.4 x 10.3 x 2 inches | Item Weight: ‎8.83 pounds

Pros

  • Easy to install
  • Simple operation
  • Efficient design
  • Helps lower energy consumption
  • Over high temp protection
  • Electric leakage protection

Cons

  • Connection quality not up to the mark
protip_icon Quick tip
In general, most tankless water heaters generate about two to five gallons of hot water per minute (1).

6. Best Self-Modulation Technology:Rheem Tankless Water Heater

Why We Think It's Worth Buying

Join the 1,118 satisfied buyers on Amazon who have said the product meets their needs and expectations.

Rheem tankless water heaters, known for its proven performance, have an eternal digital thermostatic control with an LED display. This water heating unit also offers self-modulation technology to align hot water requirements with power output. The flow rate is around 4.4 gallons per minute, and it helps deliver hot water round the clock. The unit weighs 14.8lb, and the dimensions of this device are 18.25×3.5×14.5 inches.

Shape: ‎Rectangle | Product Dimensions: ‎18.5 x 14.5 x 3.5 inches | Item Weight: ‎14.78 pounds | Material: ‎Stainless Steel | Wattage: ‎18000 watts | Color: ‎Gray

Pros

  • Silent operation
  • Easy to install
  • Digital temperature display
  • Replacement model 

Cons

  • May not be energy efficient

7. Best Compact:Marey Tankless Gas Water Heater

Do you experience frequent power outages in your area? The Marey tankless water heater is the right choice because it works on propane gas and not electricity. Just adjust the size according to your requirements, and you will never run out of hot water. Also known as an on-demand water heater, it can save up to 87% of energy and save electricity bills. The Marey water heater weighs 21lb and measures 6.9×13.6×23.6 inches. This tankless gas water heater can work on a 2D battery, and you can start the device with power ignition.

Color: White | Product Dimensions: ‎6.9 x 13.6 x 23.6 inches | Item Weight: ‎21 pounds

Pros

  • Simple installation
  • Uses propane gas as fuel
  • Efficient design
  • Helps reduce energy consumption
  • Five-year warranty
  • Hardware included
  • Compact saves space

Cons

  • May not have vent pipes

8. Best Overheating Protection:Gasland Tankless Water Heater

The Gasland tankless water heater weighs 14.65 pounds and measures 11.8×6.1×17.3 inches. It is small in size, easy to carry on vacations, and can save up to 11.5% of energy. The device has passed the CSA certification and has an anti-freeze protection drain plug that can drain the remaining water to prevent freezing when not in use or cold areas.

Protection from overheating at temperatures exceeding 167°F can ensure home safety. It is ideal for outdoor use, but you can use it indoors if you install a ventilation duct or a flue pipe.

Handle Material: ‎Metal | Shape: ‎Square | Batteries: ‎2 D batteries required | Product Dimensions: ‎15.4 x 11.8 x 5.9 inches | Item Weight: ‎16.46 pounds | Material: ‎Iron,Metal,Copper | Wattage: ‎11000.00 | Color: ‎White

Pros

  • Easy installation
  • Excellent customer service
  • Compact and lightweight
  • Battery-powered
  • Safety-tested to meet US and Canadian standards
  • Easy to use

Cons

  • May not be suitable for high altitude areas above 3300ft
protip_icon Quick tip
If many water fixtures are used simultaneously at home, such as the dishwasher and shower, it’s better to install more than one tankless water heater to maintain a decent water flow rate in each tap (1).

9. Best Easy-To-Program:Eemax Electric Tankless Water Heater

The Eemax electric tankless water heater can provide hot water quickly and continuously. It is equipped with advanced self-adjusting technology, indicating that the device can automatically adjust the required energy according to the hot water demand.

Make sure you purchase the size according to the hot water requirements and check it carefully before installation. The electrical model weighs 8.08lb and measures 11.5x 8×3.75in. The compact size of the heating device saves on storage space.

Color: Blue | Product Dimensions: ‎11.5 x 8 x 3.75 inches | Item Weight: ‎6.96 pounds | Material: ‎Stainless Steel | Wattage: ‎13 KW

Pros

  • Simple installation
  • Easy to program
  • Five years warranty for leaks and one year for parts
  • Great energy saver 

Cons

  • Suitable for sink and not shower

10. Best Safety Functions:Biselong Electric Tankless Heater

This professional grade electric tankless hot water heater is specially designed for bathing as it can maintain a constant water temperature. It has an in-built smart chip that calculates the required power base for the water flow without disturbing the water temperature, thus saving energy and your bill. You can use this instantaneous water heater for the kitchen, bathrooms, school, hospital, and hair salon. Tested by many reviewers, the digital display allows you to see the water temperature, and the touch control panel enables easy adjustment of temperature. It measures 7.4×2.5×11.8 inches and weighs 5.13 lbs.

Color: White-7.0Kw | Product Dimensions: ‎14.4 x 8.6 x 2.4 inches | Item Weight: ‎6.41 pounds | Material: ‎Pe | Wattage: ‎7 KW

Pros

  • Compact design
  • Energy saving
  • Multiple safety functions
  • Quick heating
  • 360 degrees installation
  • 1-year warranty

Cons

  • Ineffective temperature control

11. Best State-Of-The-Art Technology:Rinkmo Electric Tankless Water Heater

*The prices provided in this article are based on the latest available information. However, they may vary due to changes in pricing by the seller and/or promotional offers.

The Rinkmo electric tankless water heater is extremely safe because the hot water and the electric hose are separated to prevent rust and explosion. Using the Rinkmo heater, you can save on power bills. It also supports LED alarm, which reflects as LL or HH, when the inlet water temperature is lower than 37°F or higher than 167°F.

Silicone wire ensures heat resistance and durability. The machine weighs 11.2l pounds and measures 18x14x3.7 inches.

Wattage: 24000 watts | Product Dimensions: ‎13.12 x 3.12 x 17 inches | Item Weight: ‎22.5 pounds

Pros

  • Low maintenance
  • Saves energy
  • Compact design
  • State-of-the-art technology
  • Continuous supply of hot water 

Cons

  • May not be suitable for showers

How To Choose The Right Tankless Water Heaters?

Here are some factors that you should consider before buying a tankless water heater.

  1. Flow rate: It depends on your hot water requirement and household size. If you have a larger household and high water consumption, you need an instant water heater with a high maximum flow rate. Some heaters have multiple water outlets, while others provide only one tap. You can figure out the number of pipes that require access to hot running water to estimate the flow rate.
  2. Fuel type: Gas tankless water heaters heat water faster but may not be as convenient to carry as electric equipment. The gas needed for fuel requires a lot of space and proper installation of vents, so it is suitable for large houses. Regular post-installation maintenance is also essential. On the other hand, electric tankless water heaters are energy-efficient and provide lesser flow rates. They are stylish and require little space. The maintenance cost also is relatively less.
  3. User-friendly: Always buy a tankless water heater that is easy to use, has multiple safety features, and low noise levels. Modern technology used in these heaters ensures ease of operation. Digital displays, auto adjustment mechanisms, and other functions are always selling points.

Frequently Asked Questions

1. Can a tankless water heater work for a whole house?

A whole-house tankless water heater or centralized water heater can supply hot water to many fixtures and appliances, including showers, faucets, garage taps, dishwashers, and washing machines.

2. How do I know what size electric water heater I need?

The size of the tankless water heater required is calculated keeping in mind the flow rate — how many fixtures or appliances need a hot water supply and how much — and the temperature required to be raised by the heater.

3. How does a tankless water heater work?

Once the tankless water heater is installed at a fixed place, you can connect it to your desired fixtures and appliances that require hot water using hot water lines. These heaters have two fuel types and run either on electricity or gas, with electric heaters being more cost-effective and compact.

4. How do I flush a tankless water heater?

You should cut off the power and water supplies to and from the heater and rinse the inner parts of the heater with vinegar for 45 minutes using an external pump, garden hose, or bucket. The procedure, which takes about an hour, helps remove sediments from the heater.

5. Do tankless water heaters need a vent?

Tankless water heaters need an exhaust vent to remove the hot air they generate.

Why Trust MomJunction?

We have compiled this list of the best electric tankless water heaters after considering their quality, safety, and features. Picked from the best tankless water heater brands, these best-in-class tankless water heaters are easy to use, portable, and have higher heating power. Several users on various e-commerce sites have also endorsed them. We have included a buying guide and explained the pros and cons of each product to help you make the right decision based on your requirements.

The Bottom Line

With an electric tankless water heater, you can get access to hot water on the go. These nifty devices are compact, portable, and save more energy than traditional water heaters. You can also choose from several options that are different in size, performance, and style. Our top choices are the Stiebel Eltron Tankless Water Heater, which has a noiseless operation, and the Ecosmart Eco 18 Electric Tankless Water Heater, which has energy-efficient features. You may also consider the Rheem Tankless Water Heater, equipped with advanced self-adjusting technology. However, before choosing the best tankless water heater, assess your water requirement and household size and choose one with a reasonable flow rate. Besides this, ensure it is user-friendly with features such as an easy-to-read digital display and auto adjustments.

Infographic: Features To Check In An Electric Tankless Water Heater

A water heater is an essential home appliance for hot water for household activities, especially during winter. An electric tankless water heater is a good option if you have less space and also do not wish to store the hot water. Explore the infographic below to learn other features of a good tankless heater.

What Features Should A Good Electric Tankless Water Heater Have (infographic)

Illustration: Momjunction Design Team

Get the high-quality PDF version of this infographic.

Download Infographic in PDF version


References

MomJunction's articles are written after analyzing the research works of expert authors and institutions. Our references consist of resources established by authorities in their respective fields. You can learn more about the authenticity of the information we present in our editorial policy.
  1. Tankless or Demand-Type Water Heaters
    https://www.energy.gov/energysaver/tankless-or-demand-type-water-heaters

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