The Ecosmart ECO 18 Electric Tankless Water Heater is one of the top tankless water heaters you can find today. Besides the fact that it can perform well, you can also anticipate it to deliver a high level of convenient user experience.

If you are interested in the whole portfolio of the brand check out our EcoSmart tankless water heaters page!

The product produces up to 2.5 gallons of water per minute. In other words, it can produce amount of water similar to what a shower head generates. Nonetheless, if you are leaving in warmer areas, you will be able to support up to two shower heads using this device.

When it is sized accordingly, you will be able to save a lot of energy. Furthermore, its installation is as simple as creating plumbing connections and setting up a 150-ampere electrical panel.

You will also notice the fact that this tankless water heater is very compact. If you have limited space, this is definitely an outstanding product. Moreover, its small construction is making it very easy to carry around. If you simply want to store it, then there will be no issue as well.

To know more about the product, you should read the excerpt below. Besides what have been mentioned, there are other high-tech features that can be found in this device.

EcoSmart ECO 18 electric tankless water heater front side

Main Features

Ecosmart made it possible to develop a product that will not fall short of user-recommended features. To prove this, here are the major attributes the tankless water heater can offer:

Self-Modulating Heater. You do not need to adjust other controls so that the unit will detect the flow and temperature of incoming water. These tasks can be done by the heater automatically. The unit has sensors that can determine if the water is at the correct temperature range.

Although you will experience up to a 30-second delay, this means that the heater fixes the temperature of the water before dispensing it to your shower head or sink.

Ideal for Warm Ground. If you are living in a place where the climate is often hot, then this is a water heater to consider. When the incoming water has a temperature of 15.56 degrees Celsius, it will be able to generate up to 2.5 gallons of hot water.

Moreover, the device ensures that it will deliver water at a safe temperature of 40.56 degrees Celsius. It eliminates the risk of burning yourself when checking the temperature of the water by hand.


Temperature Control. You can configure the water temperature depending on your preferences. You will find the setting of this device convenient since the increments are by a degree.

Whole House Unit. Compared to the other models under the brand, ECO 18 is an option for bigger families. It can serve your whole house.  This implies that you do not need to install it in every sink or shower directly.

Energy Savings. Ecosmart ensures that you consume only the needed energy for its operation. According to the manufacturer, you can save as much as 60 percent of energy by utilizing the unit.

Less Complicated Installation. You need assorted cables, 125-ampere electrical panel, and a 60-ampere double pole breaker to set up the water heater. As long as you have the manual and tools, you will be able to install the device.

EcoSmart ECO 18 Performance Graph


Apart from the top-notched features of the compact yet useful water heater, you can also reap other advantages in using this product. These may also serve as reasons for you to consider the product even more:

Consistent Hot Water. Since it is tankless, it will always heat up water that goes through its lines. You do not have to worry about delays when using a faucet. For most customers it is an effete convenience to have unlimited supply of water in every possible area of your home.

Space-Saver. There are also numerous reviews of the product highlighting how this unit could save a lot of space at home. This is efficient for homes that have limited area for installing other equipment. Even if you put it in under the sink, installation will still be seamless.

Works on Both Cold and Hot Water. Regardless of the incoming water temperature, it will still deliver hot water according to your preferences. If you believe that your tank has mostly cold water, you simply have to set the temperature relief to full.

Easy Installation. Users have also tried installing the device themselves and experienced success. According to them, you simply have to study about basic plumbing to make it work. As long as you have the accessories necessary, you will be able to operate the water heater.

Affordable. Despite the many features of the product, the heater is still offered at a reasonable price. It can outperform even its more expensive rivals.

EcoSmart ECO 18 dimensions


There are flaws associated with the construction of this water heater. As anticipated, not all water heaters are spotless. Ecosmart models are proof of this. To provide you insights on the shortcomings of the product, here are the following:

Indoor Installation Online. You cannot install this device outdoors. Also, it must not be exposed to harsh elements of the environment.

Poor Warranty Terms. If you will do the installation yourself, you will likely void the warranty. This is why it is recommended that you hire a licensed professional to set up the heater. Furthermore, you must take note of the names on the warranty cards, license numbers, and contact information of the licensed electrician and plumber who took care of the installation.

Take note that the cards must be sent to the company within a month. Otherwise, you may not qualify for the warranty.


Ecosmart ECO 18 Electric Tankless Water Heater is a good choice if you are looking for a basic device. It works without too many complications. Furthermore, despite being considered a simple water heater, it does the work it claims to carry out.

Though it does not store water, which is expected in a tankless water heater, it settles the difference by delivering hot element without delays. Also, user convenience is obviously prioritized in the development of the product.

Despite the flaws of the product, you can actually say that its advantages are still plentiful. Besides, it is difficult to find a perfect water heater nowadays. It is simply about searching for one that could comply with your personal preferences.