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8 Best Tankless Water Heaters

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Hot showers will never be interrupted again. Enjoy continuous, on-demand hot water with an unlimited supply, when you want it without wasting any energy when not needed with these electric tankless water heaters.

1. Best Electric Tankless Water Heater: EcoSmart – ECO 18 Electric Tankless Water Heater

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ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating...
Ideal for providing hot water for small homes and apartments or larger point-of-use applications.

Top Features:

  • Endless hot water
  • Energy-saver
  • Space-saver

Technical Details:

  • Style option: 2 options
  • Material: Plastic, copper
  • Warranty: Lifetime
  • Weight: 14 pounds
  • Dimensions: 3.63 x 14 x 17 inches

The EcoSmart – Electric Tankless Water Heater has a copper and stainless components that are very durable. It can provide between 1.8 and 4.3 gallons per minute depending on the inlet water temperature.

Most of the reviewers say that they are very happy with this heater. It works really well and it heats up pretty quickly.

A few reviewers complained that it needs a plumber to install. Some say that they have bad customer service.

The heater’s dimensions are ‎‎‎3.63 x 14 x 17 inches. It weighs 14 pounds.

View EcoSmart – Electric Tankless Water Heater on Amazon.

2. Best Indoor: Stiebel Eltron – Electric Tankless Water Heater

Top Features:

  • Silent operation
  • Space and energy saver
  • Continous flow

Technical Details:

  • Style option: 12 options
  • Material: Plastic, copper
  • Warranty: 7 years
  • Weight: 1 pound
  • Dimensions: 4.63 x 16.63 x 14.5 inches

The Stiebel Eltron – Electric Tankless Water Heater is a small, sleek designed, eco-friendly that provides endless hot water for your whole house. One electronic switch will activate the hot water heater and it’s noise-free while in use.

Most of the reviewers say that it is worth every penny. It can produce unlimited hot water and works really well.

A few reviewers complained that it has defects upon arrival. Some say that the buttons are damaged.

The heater’s dimensions are ‎‎‎4.63 x 16.63 x 14.5 inches. It weighs 1 pound.

View Stiebel Eltron – Electric Tankless Water Heater on Amazon.

3. Best Value: ECOTOUCH – Electric Tankless Water Heater

Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital...
Provides instant and endless hot water with a minimum energy cost.

Top Features:

  • More hygiene
  • Smart modulation
  • Sleek and compact

Technical Details:

  • Style option: 3 options
  • Material: Glass, copper
  • Warranty: 5 years
  • Weight: 6.87 pounds
  • Dimensions: 15 x 11.02 x 4.84 inches

The ECOTOUCH – Electric Tankless Water Heater comes with a digital display and a touch control panel. The water heater supplies instant, consistent, endless, and adjusts power input based on flow rate and temp setting in real-time.

Most of the reviewers say that it is the quality of the heater is great. It works well, is fast, and has unlimited hot water.

A few reviewers complained that it has some problems with the plumbing design. Some say that it doesn’t last long.

The heater’s dimensions are ‎‎15 x 11.02 x 4.84 inches. It weighs 6.87 pounds.

View ECOTOUCH – Electric Tankless Water Heater on Amazon.

4. Best Natural Gas Water Heater: Rinnai – Tankless Hot Water Heater

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Rinnai Tankless Hot Water Heater / V75IN / Natural Gas / 7.5 GPM, Indoor Installation
Offers the most advanced technology with comfort and value.

Top Features:

  • Optimal water pressure
  • Enhance scale detection
  • Energy and space efficient

Technical Details:

  • Style option: 12 options
  • Material: Alloy steel, copper
  • Warranty: 10 years
  • Weight: 45.6 pounds
  • Dimensions: 14.04 x 9.27 x 26.9 inches

The Rinnai – Electric Tankless Water Heater has a high-performance up to 7.5 GPM hot water flow rate for a powerful, constant stream. It conserves energy as it heats only when necessary.

Most of the reviewers say that it is a dependable tankless unit. Best built and reliable over time.

A few reviewers complained that it is difficult to install. Some say that it never gives the accurate hotness of the water.

The heater’s dimensions are ‎‎14.04 x 9.27 x 26.9 inches. It weighs 45.6 pounds.

View Rinnai – Electric Tankless Water Heater on Amazon.

5. Rheem – Electric Tankless Water Heater

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Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, small, Gray
Hot showers will never be interrupted again with this water heater.

Top Features:

  • Digital thermostatic control
  • Advance self-modulation
  • Durable Copper immersion

Technical Details:

  • Style option: None
  • Material: Alloy Steel, copper
  • Warranty: 2 years
  • Weight: 14.8 pounds
  • Dimensions: 18.25 x 3.5 x 14.5 inches

The Rheem – Electric Tankless Water Heater has robust copper immersion heating elements with a brass top that increases durability and is threaded for easy replacement. It has continuous hot water that is on-demand for single point-of-use or multiple applications.

Most of the reviewers say that it is the digital dial control is nice. It works fine and gives what you need.

A few reviewers complained that there are internal defects. Some say it can’t handle the flow.

The heater’s dimensions are ‎‎18.25 x 3.5 x 14.5 inches. It weighs 14.8 pounds.

View Rheem – Electric Tankless Water Heater on Amazon.

6. Camplux – Electric Tankless Water Heater

Top Features:

  • Digital temperature control
  • High thermal efficiency
  • Forced exaust fan

Technical Details:

  • Style option: None
  • Material: Alloy Steel, copper
  • Warranty: 1 year
  • Weight: 23.8 pounds
  • Dimensions: 12.8 x 5.91 x 20.28 inches

The Camplux – Electric Tankless Water Heater is designed for small to medium hot water production. It has innovative combustion technology and advanced multiple protection systems to ensure your safety.

Most of the reviewers say that it works great when you understand the controls. The water never gets cold and gives endless hot water.

A few reviewers complained that it uses a non-standard vent pipe. Some say it has some faulty wires.

The heater’s dimensions are ‎‎12.8 x 5.91 x 20.28 inches. It weighs 23.8 pounds.

View Camplux – Electric Tankless Water Heater on Amazon.

7. EcoSmart – ECO 11 Electric Tankless Water Heater

Sale
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating...
Saving space, time, money, and allowing you to reduce your overall energy and water use.

Top Features:

  • Endless stream
  • Saves space
  • Saves energy

Technical Details:

  • Style option: None
  • Material: Plastic, copper
  • Warranty: 10 years
  • Weight: 6.5 pounds
  • Dimensions: 3.75 x 8 x 11.5 inches

The EcoSmart – ECO 11 Electric Tankless Water Heater has a 13-kilowatt tankless electric water heater ideal for providing up to 3.1 gallons per minute of hot water. This heater is 99% thermal energy efficient.

Most of the reviewers say that it is a great little water heater. The installation is easy, saves energy, and works fantastic.

A few reviewers complained that the warranty is useless. Some say that they have poor customer support.

The heater’s dimensions are ‎‎‎3.75 x 8 x 11.5 inches. It weighs 6.5 pounds.

View EcoSmart – ECO 11 Electric Tankless Water Heater on Amazon.

8. Eemax – Electric Tankless Water Heater

Eemax EEM24018 Electric Tankless Water Heater, Blue
Enjoy the comfort and convenience of continuous hot water at a lower price.

Top Features:

  • Self-modulating technology
  • Digital temperature control
  • Compact size

Technical Details:

  • Style option: None
  • Material: Stainless steel, copper
  • Warranty: 5 years
  • Weight: 14.27 pounds
  • Dimensions: 17 x 14 x 3.75 inches

The Eemax – Electric Tankless Water Heater provides a continuous supply of hot water and only heats the water you need. This product can be used for any of your residential or commercial water heating needs.

Most of the reviewers say that it is a nice water heater. It is compact and very efficient.

A few reviewers complained that it does not function as instructed. Some say it does not get the water hot enough.

The heater’s dimensions are ‎‎17 x 14 x 3.75 inches. It weighs 14.27 pounds.

View Eemax – Electric Tankless Water Heater on Amazon.

Best Tankless Water Heater Comparison Table

Product nameStyle optionMaterialWarrantyWeightDimensions
EcoSmart – ECO 18 Electric Tankless Water Heater2 optionsPlastic, copperLifetime14 pounds3.63 x 14 x 17 inches
Stiebel Eltron – Electric Tankless Water Heater12 optionsPlastic, copper7 years1 pound4.63 x 16.63 x 14.5 inches
ECOTOUCH – Electric Tankless Water Heater3 options Glass, copper 5 years6.87 pounds15 x 11.02 x 4.84 inches
Rinnai – Tankless Hot Water Heater12 optionsAlloy steel, copper10 years45.6 pounds14.04 x 9.27 x 26.9 inches
Rheem – Electric Tankless Water HeaterNoneAlloy Steel, copper2 years14.8 pounds18.25 x 3.5 x 14.5 inches
Camplux – Electric Tankless Water HeaterNone Alloy Steel, copper1 year23.8 pounds12.8 x 5.91 x 20.28 inches
EcoSmart – ECO 11 Electric Tankless Water HeaterNone Plastic, copper10 years6.5 pounds3.75 x 8 x 11.5 inches
Eemax – Electric Tankless Water HeaterNoneStainless steel, copper5 years14.27 pounds17 x 14 x 3.75 inches

Best Tankless Water Heater FAQs

Can you take a shower with a tankless water heater?

Tankless water heaters provide instant hot water the second you turn on the switch. It is ready to bring heated water to your bathroom faucets, kitchen sink, shower, dishwasher, and washing machine.

Do tankless water heaters need annual maintenance?

Keeping up with maintenance, including tankless water heater cleaning, should take place at least once a year. You may need to take care of other tasks, such as wiping down the exterior of the unit, more often, especially if the area where you install the water heater receives a lot of dust.

Is it worth switching to a tankless water heater?

The big advantage of tankless water heaters is that they use less energy since they only heat up water when you need it. You can save hundreds on your energy bill each year. Because they don’t waste power, you can also enjoy the fact that your home will be more sustainable and eco-friendly.

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