Best Electric Tankless Water Heater

In the past, even the best electric tankless water heaters on the market did not last long, and their lack of durability and longevity gave this type of appliance a bad name. These units were also generally known for not being able to keep up with the water heating demands of a full, busy household. Simply put, they were not considered worth the investment by most technicians and homeowners. However, this has all changed in recent years.

Thanks to technological advances and further development through trial and error, electric tankless water heaters are now one of the best options if you are looking for a water heating option that uses less energy than your current system. Let’s quickly cover some key aspects of the technology used in the best electric tankless water heaters. Then, we’ll look specifically at a wide range of the most prominent models out there today.

Electric Tankless Water Heater FAQs

The technologies used in striving to design the best electric tankless water heater are still new to most of us. Therefore, you may have some questions regarding how these heaters actually work and why they may be a better option than your classic water heater with a large tank. Here are some questions that are bound to arise.

1. What Is an Electric Tankless Water Heater?

2. Does an Electric Tankless Water Heater Require Maintenance?

3. Hard Water vs. Soft Water

4. What Happens When Your Power Goes Out?

How We Reviewed

In our search for the best electric tankless water heater, we evaluated many models from different makers. Our parameters included features, pricing, availability, warranty coverage, and overall value based on notable pros and cons we discovered for each.

Overall Price Range of the Best Electric Tankless Water Heaters

As with other household appliances, prices vary widely for the best electric tankless water heaters. Spending more will typically get you benefits such as faster heating and water delivery, greater energy efficiency, more convenient controls, and reduced maintenance requirements.

Water Heaters We Reviewed

Our Top Picks of Heaters

2.8 out 5 stars

Stiebel Eltron 231045 Mini 2 Point of Use Tankless Electric Water...
  • Extremely compact design saves space
  • Sleek design is appealing and can be mounted in plain sight
  • Minimum flow to activate unit: 0.21 GPM 0.8 l/min and internally restricted to 0.32 GPM

Features

This is a strong candidate for the best electric tankless water heater if you are looking for a small, compact unit that can fit almost anywhere in your home. If you live in a smaller home with little or no storage space and want to use an electric tankless water heater, this is indeed a great option for you. It has a sleek design that does not look like an industrial piece, allowing it to be installed virtually anywhere without creating an eyesore.

Warranty

This product has a leakage warranty of seven years and a damage-or-defect warranty extending for three years.

Pros

  • Compact design
  • Easily mounted during installation
  • Energy savings vs. older technology

Cons

  • Water temperature may be inconsistent
  • Low rate of delivery, measured in gallons per minute (GPM)

3.1 out 5 stars

Bosch Electric Tankless Water Heater - Eliminate Time for Hot Water -...
  • 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

Features

This may be the best electric tankless water heater for you if you are looking for one that can be used either residentially or commercially. This heater has a built-in water movement sensor to make sure the temperature of the water going out is consistent. There is virtually no loss of energy when the device is not in use, making it a great energy-saving option.

Warranty

This device has a five-year limited warranty and a two-year limited warranty on additional accessories.

Pros

  • Consistent hot water delivery
  • Great for residential or commercial use

Cons

  • Expensive for some budgets
  • Cannot be plugged into a standard outlet, but must be hard-wired with a breaker

4.1 out 5 stars

Eccotemp EM-2.5 Electric 2.5-Gallon Mini Tank Water Heater
  • Compact design fits virtually anywhere, easy and ready to install
  • Adjustable temperature control 50 Degree-140 Degree
  • Temperature/Pressure relief valve included

Features

This is one of the best electric water heaters to check out if you are looking for a “mini” option. It comes in various sizes, including 2.5 gallons for solo users and couples, 4 gallons for medium-sized households, and 7 gallons for larger households. Again, like other heaters listed here, this one is designed to blend into your decor unobtrusively. It can be placed on the floor or easily mounted on a wall with the heavy-duty brackets included.

Warranty

This product has a five-year limited warranty.

Pros

  • Compact design
  • Floor-standing or wall-mountable
  • Various tank sizes available

Cons

  • Must turn this unit upside down to flush
  • Low water pressure

4.4 out 5 stars

Stiebel Eltron Tempra Plus 29 kW, tankless electric water heater with...
  • Proven reliability
  • No venting required
  • Sleek design fits anywhere

Features

This is one of the most technically advanced and, therefore, one of the best electric tankless water heaters on the market. It is equipped with a flow monitor to ensure constant and reliable temperatures, and there are various controls on the outside of the tank enabling you to regulate the heat level and other operating variables.

Warranty

This product carries a three-year warranty to protect the buyer against defects in the device or any materials or components that come with it.

Pros

  • Top-quality design and construction
  • Ability to set the flow level

Cons

  • Expensive for the product category
  • Large size can make fitting the unit in your home a challenge

2.4 out 5 stars

2.3 GPM Electric Tankless Water Heater. IHEAT S-12 replaces Model...
  • iHeat S series is a lead free certified product. Manufactured in complete stainless steel.
  • Maximum current 240V: 56 Amps. Require Breaker 1x60 Amps Double-Pole. And Wire Gauge: 1 x #6AWG
  • Advanced Power Modulation through Micro-Processor. Complies with USA & Canadian Safety Standards

Features

This electric tankless water heater is made of stainless steel and certified lead-free. This differentiates it from other tankless hot water heaters that are made of plastic or other materials that may not be as durable. The stainless steel helps avoid deterioration of the tank. Also, this design is very compact, which makes it great for people with diverse lifestyles as well as light commercial applications.

Warranty

This product comes with a three-year warranty covering any internal or electrical issues that may arise and a five-year warranty that covers leaks.

Pros

  • Great for residential or commercial use
  • Affordable

Cons

  • Only for indoor use
  • Takes a while to heat up

4 out 5 stars

Features

This 220V Titan heater is one of the best affordable options we found. For this smaller-capacity tankless water heater, it is extra-important to determine how close you will position the unit to your source of water flow, as this may influence your buying decision.

Warranty

This product comes with a three-year warranty covering any internal or electrical issues that may arise and a five-year warranty that covers leaks.

Pros

  • Sufficient supply for about two hot baths
  • Good for indoor use

Cons

  • Complaints of hot water coming out cold or lukewarm
  • Heater may turn off unexpectedly and require resetting

3.6 out 5 stars

Marey ECO110 220V Self-Modulating 11 kW, Small, White
  • The 220V ECO 11kW unit is ideal for 2 simultaneous points of use in US Southern Regions where the incoming water...
  • German-designed with high quality stainless steel water channel and heating chamber.
  • SMART Technology: Easy management and simple adjustments on a LCD Panel allows you to program the exact desired water...

Features

This is an excellent tankless water heater if you live in a region where water flowing into your home is typically above 70 degrees. However, if you live in a colder region, this unit can only be reliably used to supply a sink with hot water. You will want to consider a larger, more powerful unit if you want to supply hot water to a busy household or multiple rooms.

Warranty

This product from Marey includes a five-year warranty.

Pros

  • Affordable
  • Great for one or two people

Cons

  • Best suited for warmer climates
  • Won’t handle two different water demands at the same time

4.2 out 5 stars

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater
  • 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

Features

If you are accustomed to using digital appliances in your home, then you are probably going to love this electric tankless hot water heater. There is a digital external control that allows you to change the water temperature, and readouts are provided by LED lights so you can read the current water temperature in a dark room. This device is extremely easy to use and an Amazon Choice winner in the category of the best electric tankless water heaters.

Warranty

This product is covered by a standard manufacturer’s warranty. Please seek more details before you purchase.

Pros

  • Affordable
  • Great for one or two people

Cons

  • Best suited for warmer climates
  • Won’t handle two different water demands at the same time

2.4 out 5 stars

Atmor AT-900-03 Single Sink 3kw/110V, 0.5 GPM Point-Of-Use Tankless...
  • Ideal for single sink application in areas with at least 57° ground water temperature
  • Maximum flow rate 0.5 GPM (Gallons per Minute) = 45° F temperature rise. Slower flow rate = higher temperature...
  • Requires a direct connection to a 30 Amp single-phase breaker. Required wire size: 10 AWG. Not a plug-in unit.

Features

This is another solid option among the best electric tankless water heaters if you are looking for a unit to supply a sink only. This heater is not suitable for bath or shower use. If you live in a small apartment and want an alternate water heating source for your kitchen or bathroom sink, to cite one possible application, this Atmor heater is worth a look

Warranty

This product carries distinct two-year and seven-year warranties to protect the consumer against various defects and component issues.

Pros

  • Nearly instant hot water source for sinks
  • Easy installation
  • Affordable

Cons

  • Can only be used on one sink

3.8 out 5 stars

Features

This unit from Sio Green is an appealing, decidedly high-tech tankless water heater. It has digital infrared controls that are easy to read in the dark and enable precise control. The material it is made of ensures there will be no corrosion or bacteria buildup.

Warranty

This product comes with a two-year warranty.

Pros

  • If placed close to a source, this unit is a great source of hot water
  • You can use two water sources at once

Cons

  • Works much better in warmer climates
  • Customer support is questionable, according to reviewers

4.2 out 5 stars

Ariston GL4S Electric Mini-Tank Water Heater
  • Point-of-use 4-gallon mini-tank water heater
  • Provides instant hot water for your sink's faucet
  • No hard wiring needed, simply plug into an outlet; installs independently or with a larger water-heating source

Features

If you are looking for a mini-tank electric water heater, this is a great option. It comes in one size, 4 gallons, which is suitable for most medium-sized households. This product is only to be used to supply sinks; it is not suitable for bath or shower use.

Warranty

This product comes with a 6-year limited warranty.

Pros

  • Great choice if you are looking for a reliable water heater for your sink
  • Can hold plenty of water for sink use alone

Cons

  • Expensive for its functionality
  • Heavy at 17 pounds

3.7 out 5 stars

Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water...
  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM

Features

This is one of the best electric tankless water heaters for residential use. It can be easily installed without the help of a plumber and. It is lightweight at only around 8 pounds and is small in size which makes it great to fit in different areas of your house, especially if you live in a smaller home.

Warranty

This product has no applicable warranty.

Pros

  • Can hold 7 gallons
  • Small size

Cons

  • Claims that it raises water or electric bill
  • Wiring set up may be difficult if you are switching from a tank

3.4 out 5 stars

Rheem RTE 13 Electric Tankless Water Heater, 4 GPM
  • On-unit temperature control, LEDs indicate active element and standby mode
  • Standard 1/2" water connection
  • Rugged brass/copper heat exchanger

Features

This electric tankless water heater has great features and controls to help you regulate water temperature as accurately as possible. It is also great at regulating temperature flow, and all key variables can be changed via the high-visibility controls on the outside of this device.

Warranty

You should investigate the current, applicable warranty provided with this Rheem product before you purchase one.

Pros

  • Works well in motor homes
  • An efficient choice

Cons

  • Power demands cause lights to flicker in some cases

Comparison Table

The Verdict

The best electric tankless water heater for you and your family is definitely out there, now that there are so many options on the market. A projection that households will switch to tankless water heaters more and more in the next 10 years is very prevalent in the media as well. If you are in the process of figuring out which tankless water heater is best for you, we encourage you to put the information above to work, and also to consult your local plumber or electrician.

Visit Us On FacebookVisit Us On PinterestCheck Our Feed