10 Best Electric Tankless Water Heater Reviews

Best Electric Tankless Water Heater

Plentiful and reliable hot water is essential for survival, and tankless water heaters are the most recent innovation that hit the household scene. While the name tankless does tell part of the story of a full front, there is a lot more that you need to understand when you are deciding whether a tankless water heater is right for you or not.

Most people have tanks style water heaters that have not changed much since Indo plumbing became a regular part of home construction. An energy source, typically electricity, natural gas, or propane, warms the water stored in the tank until a thermostat shuts off the energy source that presents the temperature level. As a thermostat tank turns on the energy source again, warming the water brings it up to the temperature even if no hot water has been used from the taps.

10 Best Electric Tankless Water Heater Review

Keeping the significance of time in mind, we have performed our research on the best electric tankless water heaters and shortlisted the top 10. All of them are maintained in quality and will be very helpful to you.

  1. Best Recommended Overall: Ecosmart ECO 36
  2. Best Runner Up: Ecosmart ECO 11
  3. Best for Copper immersion: Rheem RTEX-24
  4. Best Residential: Rimko Electrical Tankless Water Heater
  5. Best Having Smart Technology: Marey ECO180
  6. Best Space-Saver: BOSCH Tronic 30000
  7. Best Field Replaceable: Echosmart POU 3.5
  8. Best Energy-Efficient: Ecosmart ECOMINI6
  9. Best for Self-patented Technology: Ecosmart ECO 24
  10. Best Full-range Temperature Control: Eemax EEM24013

1. Ecosmart ECO 36



  • 99.8% energy efficient.
  • Digital output temperature display.
  • Have great temperature control.
  • Self-modulating technology.


  • Choking hazard.

Ecosmart ECO 36 comes with a uniquely sleek and compact design having a digital display for outputting temperature. Life-enhancing eco-friendly electric tankless heaters enable you to enjoy every bit of winter and share the affection of endless hot water. Its elevated energy department saves up to 50% of the heating cost than a regular tank heater.

Being 90% smaller than traditional water tanks, Ecosmart’s sleek yet elegant design can free your ground space for more depository. ECO 36 prevails in a 36-kilowatt tankless water heater ideal for a compartment or even for a whole house application.

It involves only three steps for having extensive hot water, determining water temperature, how many applications your unit can run, and determining the electrical infrastructure. It can touch the lower temperature of 37°F. It precisely has a straightforward installation method that can happen in no time.

2. Ecosmart ECO 11

Ecosmart ECO 11


  • Self-mounted technology.
  • Lifetime warranty.
  • 99.8% energy efficient.


  • No power source.

Ecosmart Eco 11 tankless water heater comes with a lifetime warranty. You can save up to 60% off your water heating cost and will never run out of hot water with an ecosmart tankless water heater. It is patented with self-modulating technology and has a unique sleek design.

Being 99.8% energy-efficient, it is not only easy to install but also provides tech support. Ecosmart provides life in a housing tankless electric water heater that can deliver endless hot water while saving your time and energy.

It is a technologically advanced product that can be used at any size of the environment. Easy to install in a dependable and compact design, it can see more space than a traditional water tankless heater. Digital temperature control up to 80°F to 140°F, Ecosmart Eco 11 features the most advanced self-modulating technology.

When it comes to its installation, it required a minimum 125 amp electrical panel with a 160 amp double pole breaker. It involves the basics of determining the water temperature, determining how many applications that unit can run in one time, and your company’s specification and electrical infrastructure. This water heater is best suited for heating up to 2 gallons per minute. The digital temperature control feature allows you to adjust your temperature in an increment of 1°.

3. Rheem RTEX-24

Rheem RTEX-24


  • 99.8% energy efficient.
  • Robust copper immersion.
  • Digital temperature display.
  • Digital thermostatic control.


  • Must be careful when circuits are connected.

Rheem RTEX-24 is an on-demand and consistent residential electric tankless water heater with self-modulating power control that can provide continuous hot water. It can manage 24kW of flow rate, which is up to 5.9 GMP approximately. Having a compact and stylish design comes with digital temperature control to increase the temperature of 1°F, ranging from 80°F to 140°F.

It is up to 99.8% energy efficient. It comes with a vital copper immersion heating element that can increase the durability rate. Simple installation allows you to place it on the right spot with the need of ¾ inches NPT water connections.

It has an external digital thermostatic control with an LED display that makes it a more advanced electric tankless water heater. You can adjust the power according to your needs.

4. Rimko Electric Tankless Water Heater

Rimko Electric Tankless Water Heater


  • Temperature control feature.
  • 99.8% energy efficient.
  • Switching between Fahrenheit/ Celsius.
  • Saves 60% water heating cost.
  • Ten security technology systems, including auto-off.


  • May lose control over changing hot/ cold water.

Rinku electric tankless water heater is a 3 Kilowatt 240 volt instant residential electric water heater suitable for bathroom bathtub or even for the whole house appliances.

It requires 2x 40 amp breakers and 2x 288 buyers for its installation and can handle 0.4 GPM water flow per minute. There is no need to preheat before using a hit. Being 99.8% energy efficient, you can find your water heating cost reduced by d up to 60%.

You can get hot enough water within 3 seconds. Its smart modulating technology provides a stable water temperature for the whole house using a. Remco electric tankless water heaters come in a compact size that can save this space and give more to your area.

Being easy to install and easy to operate, it will provide you the turning button to switch between Fand Celsius. How to stop temperature allows the water heater to stop automatically when it gets over-temperature or low water pressure. Featuring fault auto-detection, it is sensitive enough for leakage protection.

5. Marey ECO180



  • Smart Technology maximizes energy saving.
  • Digital panel display design.
  • Does not contain any fabric.
  • Corrosion-resistant reduces hard water.


  • Installation must be from professional.

Marey EVO180 is 18 kilowatts 220-volt self-modulating multiple points tankless electric water heater that will work incredibly for the whole territory. The exact desired water temperature can be adjusted by using its smart technology.

Easy management and a simple adjustment on the LCD panel will help you to program it accordingly. As the water never touches the heating element, it is the perfect solution for multiple points of use in any area.

Providing 36 °s F at 4.0 GPM will allow you to have various point-of-use even in hot climates. In the colder regions, this unit can reach up to 80 °s F at 1.53 GMP at one point of use. It can handle the water flow rate of up to 5 gallons per minute.

It is explicitly designed with a patented-heating technology that will help corrosion-resistant and reduce chlorine and calcium formation in the water. When it comes to its installation, a professional plumber can be done as it requires 2x 50 amp breakers.

6. BOSCH Tronic 3000



  • Three space-saving applications.
  • 98% energy efficient.
  • Temperature control feature.
  • No storage tank required.


  • Temperature output not available.

BOSCH Tronic 3000 electric tankless water heater that can generate hot water in no time. Considered as a 7.2k point of use under sink tankless water heater available in four different compact sizes so that you can mount it under your sink into your cabinet or even onto the wall due to its attractive design.

Being 98% efficient, it ensures the safety and an extended lifetime warranty. Provide the hot water directly without any use of a storage tank. Being a small, lightweight, electric tankless water heater will be an excellent choice for small spaces. You can use it whether you need it in a basement, kitchen, station, utility room, or even a garage. Reliable enough and backed by a limited 54 warranty on the heating element and one-year limited warranty on other components.

The Tronic 3000 from BOSCH electric tankless heater is good enough as it requires low maintenance with less wait for the water to be hot.

7. Ecosmart POU 3.5



  • Digital temperature control.
  • Field replaceable elements.
  • Implicate tech support.
  • Advanced self-modulating technology.


  • Never use with multiple mixtures.

Ecosmart POU 3.5 is an excellent product from the stream of Ecosmart that provides endless hot water and saves up to 50% off water heating cost. Compact design helps in saving more storage space than regular water heaters. Digital temperature control can allow you to adjust the temperature between 80 °s F to 140 °s F. Featuring advanced self-modulating technology has a maximum flow rate of 0.5 gallons per minute and includes 0.5 gallons per minute.

Featuring advanced self-modulating technology has a maximum flow rate of 0.5 gallons per minute and consists of 0.5 gallons per minute sink aerator. To get the endless hot water from Eco POU 3.5, you have to follow three smart steps determining your water temperature according to your location, the flow rate of application, and the electrical infrastructure.

When it comes to its installation, it requires a minimum 100 amp electric panel with the 1x 30 amp single pole breaker connected to 10 AWG wire. 

8. Ecosmart ECOMINI6

Ecosmart ECOMINI6


  • No need for recirculating lines and pipes.
  • 99.8% energy efficient.
  • Digital output display.
  • Temperature control feature.


  • Might have low flow shower.

Ecosmart Ecomini6 comes with a sleek and compact design that is popular for saving water by eliminating hot water’s weight from reaching the faucet. There is no need for costly circulating lines and pumps for installing.

You can directly install the heater at the sink, and by simply typing into the waterline, you can get the hot water coming out. Lightweight and compact enough, it takes almost a minute to get its job done and let you save water by getting hot water immediately.

Being 99.8% energy-efficient, this Ecosmart Ecomini6 is rated at 12 amps for voltage and 1440 watts. A dedicated circuit is recommended using a 30 amp breaker, and it comes with three feet cord. This electric tankless water heater weighs only 24.9 lbs. it comes with an excellent warranty of 6-year narrow leaves and 2-year limited parts.

9. Ecosmart ECO 24



  • 99.8% energy efficient.
  • Saves up to 60% water heating cost.
  • Patented self-modulating technology.
  • Lifetime warranty.
  • Temperature control feature.


  • No power source.

Ecosmart Eco 24 comes with 24 kilowatts at 240 voltage is the electric tankless water heater having a lifetime warranty. Patented self-modulating technology and detective design that has an activation flow of 0.3 GPM.

Being 99.8% energy-efficient, it will never run out of hot water and save up to 60% on water heating costs. Ecosmart launches a stream of products that are technological advances and used worldwide in any size. Ecosmart ECO24 has a digital temperature control of 80°F to 140°F with field-replaceable elements, a perfect choice for between 2.5 gallons and 5.8 gallons per minute depending on the water temperature.

Having Ecosmart will bring to the warm water availability on demand. This product of Ecosmart weighs only 11 lbs. This electric water heater hands nicely on the wall and can display the water temperature through a digital output display.

10. Eemax EEM24013

Eemax EEM24013


  • Advanced self-modulating technology.
  • Temperature control features.
  • Implicate tech support.


  • Careful in adjusting the heat.

Relax EEM24013 is an electric tankless water heater capable of providing a regular supply of hot water whenever you need it. Self-modulating Technology adjusts the energy level how much energy to be input is based on the quantity of water required.

This product is specifically designed to handle point-of-use applications and can be used for any residential needs. This Eemax works evenly for one sink in a colder climate or one shower and one sink in warmer weather.

It comes in a stainless steel body and weights. Featuring advanced self-modulating technology, it has the capability of 2.4 gallons per minute water consumption. Moreover, it has a full-range temperature control that is easily adjusted from the front of two units.

Buyer’s Guide – Things To Know Before Buying Electric Tankless Water Heater

Electric tankless water heaters not only provide hot water when you need it but can also associate with other storage devices at your home so that you can turn on your faucet and have hot enough water immediately.

Thus far, it is the best home improvement item you have ever purchased if you are interested in buying an electric tankless water heater, whether for your home, office, or any territory, you must consider some necessary aspects before.

  • Sizing

Whenever you purchase an electric tankless water heater, one of the most important factors to keep in mind is the temperature to flow rate. You should have known how hot your water can get at a given flow rate. To make it easy to understand, the tankless water heaters have a scale that helps to know the maximum temperature.

  • Flow Rate

If you are going to choose an electric tankless water heater that will be enough for the whole house, you will need to find the water heater’s flow rate. Once you have determined average use, it will help you choose the right device to reduce energy costs.

  • Temperature Rise and Digital Display

Before installing any electric tankless water heater, you must have known the groundwater temperature as the more the groundwater temperature is, the more energy an electric tankless water heater will take to make it hot. Each device will vary based on flow rates and temperature rise.

Digital display always helps you monitor the temperature level ll and pressure reading and other considerable information.

  • Recirculation

Recirculation is designed to loop cold water standing in the hot water line back to the unit. The water is pushed through a dedicated return line, and the recirculation delivers the hot water instantly why you wait for it to heat up.

  • Capacity

Capacity should be considered before buying an electric tankless water heater. It is crucial to view the number of gallons of water the heater can deliver. Typically electric water theta can hold more than 55 gallons.

FAQs about Electric Tankless Water Heater

Electrical water tankless heaters are the most widely used water heaters that assist in the typical use of kitchen dishes, laundry, bathing, and space heating purposes. Below are some frequently asked questions that you may have in your mind.

How much does it cost to install an electric tankless water heater?

Tankless water heater saves money in the long run but to make cost at the initial. It mainly depends upon the type of water heater, as well as the sizing and capacity. As well as the production goes higher, an electric tankless water heater cost increases.

What is the best place to install an electric tankless water heater?

Well, it depends upon where you are going to use it. If you want to use it only for dishes, you can install it in your kitchen. If you’re going to use it for the whole house usage, you can inaugurate it anywhere into your house, might be in the backyard, to make it available all over the place.

Is it safe to use an electric tankless water heater?

Electric water heaters are explicitly designed by undertaking safety measures. An energy source warms the water stored in the tank until a thermostat shuts off the energy source.


You cannot imagine a life without having a tankless water heater, as it is the most crucial thing to install at your home. Conclusively, from the above-listed electric tankless water heaters, Ecosmart ECO 36 is the best recommended overall electric tankless water heater that heats water and provides thoroughly and becomes an essential product you need to install into your home. Its sleek yet elegant design can offer you free ground space for more depository.

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