The Best Electric Tankless Water Heater

An electric tankless water heater is the most affordable option for homeowners looking to retrofit their system. Just like the gas-powered models, electric systems will allow you to save a lot of money on your energy bills, plus it will give you constant hot water on demand without the limitations of a tank. It doesn’t matter if you live alone in a studio apartment or in a bustling household with many bathrooms, there are specific electric tankless electric water heaters that will suit your needs. Now if you are looking for the best electric tankless water heater, we recommend you get the Ecosmart ECO 27. This is by far, the most popular electric tankless water heater, and for good reason. Keep reading to understand why it is considered the best electric tankless water heater today.

Main Characteristics

The Ecosmart ECO 27 is one of the most powerful electric tankless water heaters. It is self modulating and more technologically advanced than most of the electric tankless water heaters on the market today. It has the capacity to provide hot water to a large home and can even handle a large tub or a Jacuzzi. That's how powerful it is. It can heat water at 3 gallons per minute which makes it very ideal for places with water temperatures that are below 40 degrees Fahrenheit. This water heater can produce hot water on demand and in sufficient quantities. This is especially great if you and other family members need to use hot water at the same time. This electric tankless water heater has internal jumpers which limit the heat output to a temperature of 105 degrees Fahrenheit. For the uninitiated, that means that it will never heat your water higher than that. It also means that your children and the elderly who live in the house won't get accidentally burned by scalding hot water.
You will also be able to control the temperature of the hot water by using the digital temperature control in one degree increments. Furthermore, this water heater has a 99.8 percent energy efficiency rating, so you can cut energy costs by as much as 50 percent. The reason why it has a high energy efficiency is because of the self modulating flow sensor technology. This technology modulates the energy consumption which will help conserve energy while still meeting the desired heating needs of the user.

Pros and Cons


  • Very reliable in heating the water
  • Very easy to operate
  • Parts are covered by a lifetime warranty
  • Easy cleaning and maintenance


  • There is a slight delay before the water that comes out gets hot
  • Requires a minimum of 200 amp total service with three 40 DP breakers to provide protection for 240 volts
  • It does not cover warranty on labor
  • A bit complicated to assemble


This heater has a stylish and advanced design which looks very pleasing to the eyes. It is also designed to save space since it is not a bulky water heater. Due to its design, you can install it under cabinets, or in closets, so they are out of your way. Aside from it being space saving, this water heater is also designed to be safe and rupture proof, so you need not worry about flooding. Lastly, this electric tankless water heater has been configured to accommodate cold climates.

Special Features

What makes this water heater stand out from the rest is its Self-Modulating Technology. As mentioned above, this feature will allow the unit to use less energy to heat the water. This will in turn save you money on your monthly electric bill. In fact, the ECO 27 can cut your electric bill by as much as 30% if you switch from your traditional water heater. This is also the largest and most powerful model with self-modulating technology from Ecosmart’s line of tankless water heaters, so it is great for a large single family home.


The ECO 27 has a limited lifetime warranty for residential use when registered properly and installed within 30 days of purchase by a licensed professional.


The EcoSmart ECO 27 is considered the best electric tankless water heater today. This is even more recommended if you live in colder climates. It generates enough power to heat water for your entire family and to provide an endless supply of hot water whenever you need it. It has state of the art technology for energy conservation and is safe and easy to clean and maintain. And it has a lifetime warranty too. What more can you ask for?

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