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Best Electric Tankless Water Heaters 2020

February 28, 2020 By Taylor Simons

Electric tankless water heaters are growing in popularity in spite of the large price tag many of them carry. Their popularity can be owed to their compact size, energy-saving features, and good heat output. To help you find the best electric tankless water heater for your home, we came up with 5 top-selling products. For a product to make our list, we focused on certain features such as user-friendliness, heat and energy-saving factors, durability, and overall performance.

5. Rheem RTEX-18 Residential Tankless Water Heater

best RHEEM RTEX 18 Residential electric tankless water heater

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  • Item Dimensions: 4″ x 15″ x 19″
  • Item Weight: 8.5lbs
  • Voltage: 240V
  • Water Connection: ¾” NPT
  • Max Flow Rate: 4.4 GPM
  • Max Temperature Setting: 140ºF (60ºC)
  • Min Temperature Setting: 80ºF (26.67ºC)
  • Certification: ETL, UL
  • Warranty: Heating Chamber: 5 Years | Parts: 1 Year
Pros
Compact design.
Good self-modulation features.
Heats up well in cold weather.
Cons
Can cause LED lights to flicker.
Difficulties heating multiple faucets simultaneously.
Installation instructions aren’t always correct.

Bottom Line

At the start of the list of the best electric tankless water heater is the Rheem RTEX-18. It features an external digital thermostatic control with an LED display. This may better suit those who require a good amount of hot water in chilly conditions, but perhaps not all at the same time. In spite of what it advertises, it doesn’t work as well if you’re trying to run two showers.

4. Titan SCR2 N-120 Electric Tankless Water Heater

best Titan SCR2 N 120 electric tankless water heater

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  • Item Dimensions: 12″ x 10″ x 5″
  • Item Weight: 8lbs
  • Voltage: 220V
  • Water Connection: ½” Standard Pipe
  • Max Flow Rate: 4.0 GPM
  • Max Temperature Setting: n/a
  • Min Temperature Setting: n/a
  • Certification: UL compliant
  • Warranty: Casing: 10 Years | Components: 1 Year
Pros
Good hard water resistance.
Requires no venting.
Easy installation.
Cons
Not meant for cold weather.
Quality control problems.
Some water pressure issues.

Bottom Line

The Titan SCR2 N-120 is a whole-house system that can fit well in a small-medium sized family home. However, it’s advertised as only working best in warm weather conditions. If you live somewhere cold, it’s best to install this just for one room like a kitchen. Even so, it can heat well and fast, and its space-saving design allows it to hang anywhere. It features a basic push-control panel for temperature control.

3. EcoSmart ECO 27 Electric Tankless Water Heater

best Ecosmart Eco 27 electric tankless water heater

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  • Item Dimensions: 17″ x 17″ x 3.625″
  • Item Weight: 14.7lbs
  • Voltage: 240V
  • Water Connection: ¾” NPT
  • Max Flow Rate: 6.0 GPM
  • Max Temperature Setting: 140ºF (60ºC)
  • Min Temperature Setting: 80ºF (26.67ºC)
  • Certification: UL, CSA, and ETL
  • Warranty: Electronics, Exchanger, and Element: Limited lifetime
Pros
True self-modulating system.
Easy-to-use digital temperature controls.
Quiet operation.
Cons
Outside temperature can drastically alter the performance.
May not include the necessary components to install.
Might leak from the bottom of the unit.

Bottom Line

The EcoSmart ECO 27 is known by many to be the best electric tankless water heater out today. It heats water on demand to help save on energy costs, and it promises a high energy efficiency (99.8%). The unit is safe as well thanks to the overheating and overloading protection. This is designed with single-family homes in mind that need hot water for concurrent use. Those with smaller homes may find this too much considering it’s not the most budget-friendly product.

2. Rheem RTEX-13 Residential Tankless Water Heater

best RHEEM RTEX 13 residential electric tankless water heater

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  • Item Dimensions: 4″ x 9″ x 13″
  • Item Weight: 8.5lbs
  • Voltage: 240V
  • Water Connection: ½” NPT
  • Max Flow Rate: 3.17 GPM
  • Max Temperature Setting: 140ºF (60ºC)
  • Min Temperature Setting: 80ºF (26.67ºC)
  • Certification: ETL, UL
  • Warranty: Heating Chamber: 5 Years | Parts: 1 Year
Pros
Simple installation.
Prevents standby heat loss w/ the modulating heat exchanger.
Maintains pre-set temperature well.
Cons
May require you purchase additional components.
Issues delivering hot water to multiple faucets.
Doesn’t handle hard water well.

Bottom Line

Similar to other Rheem products, the RTEX-13 is built with users in mind. Installation is straightforward and the unit itself is easy to control. The self-modulating system is there so you don’t use more hot water than needed. Due to its size and small max flow rate number, the RTEX-13 is the best electric tankless water heater to benefit those in smaller households or even apartments.

1. Stiebel Eltron Tempra 24 Plus Tankless Electric Water Heater

best STIEBEL eltron tempra electric tankless water heater

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  • Item Dimensions: 21.7″ x 20.1″ x 9.6″
  • Item Weight: 16.1lbs
  • Voltage: 240V
  • Water Connection: ¾” NPT
  • Max Flow Rate: 4.0 GPM
  • Max Temperature Setting: 140ºF (60ºC)
  • Min Temperature Setting: 86º (30ºC)
  • Certification: ETL, WQA, ISO
  • Warranty: Leakage: 7 Years | Parts: 3 Years
Pros
Maintains a steady temperature.
Runs quietly.
Easy to control.
Cons
Installation is not always easy.
Large power requirements.
May lower water pressure.

Bottom Line

Last in the search for the best electric tankless water heater is the Stiebel Eltron Tempra Plus. This electric water heater is generous in size, and yet it still manages to provide a small enough footprint to save you on additional space. This best fits with an average or small family home. Anything larger and it may not perform at its highest quality. Also, since it requires a good deal of proper wiring, expert installation is needed for most people. Moreover, you can also check out the Tempra 29 Plus as well.

Wrap Up

As more individuals do away with traditional tanked water heaters, they look to electric tankless ones that have quality performance in a small package. The best electric tankless water heater has much to do with your individual needs. Even still, they offer good performance, are reliable, and easy to use. If you’ve used any of the products reviewed here, let us know how you feel about them.

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