Ecosmart Tankless Water Heater Reviews – Picking The Best One For Your Needs


We have reviewed our top 9 choices below and also done in-depth reviews by brands, but if you are in a rush:

Here’s our top choice:  EcoSmart ECO 36 36kw 240V Electric Tankless Water Heater (View on

Tankless hot water heaters offer a twist on traditional hot water heaters that have bulky tanks that take up a lot of space. Some of the top models on the market today come from EcoSmart, a company that specializes in making electronics that produce less waste, cost less to operate and are better for the environment. Its tankless water heaters are great for home use, but the company makes pool heaters and other products too.

Though the EcoSmart ECO 36 36kw 240V Electric Tankless Water Heater is the best tankless water heater from the company, we recommend that you view and compare all its top models.


The EcoSmart ECO 36 36kw 240V Electric Tankless Water Heater is the best EcoSmart tankless water heater and also the largest available from the company, which makes it great for larger homes. Designed to help you save up to 50% on your water heating bills, the ECO 36 features stainless-steel components and parts made from copper that will last for a decade or more. It requires just 240 volts to run and features a silver knob that turns in two different directions to adjust the temperature as well as a digital screen with a bright display on the front.

RankProductReview Score
1EcoSmart ECO 36 36kw 240V Electric
9.9Buy on Amazon
2EcoSmart ECO 27 Electric
9.8View Product
3EcoSmart ECO 24 24 KW at 240-Volt
9.8Buy on Amazon
4EcoSmart ECO 18 Electric
9.5Buy on Amazon
5EcoSmart ECO 11 Electric
9.3Buy on Amazon
6EcoSmart 8 KW Electric
8.8Buy on Amazon
7EcoSmart POU 6 Point of Use Electric
8.6Buy on Amazon
8EcoSmart POU 3.5 Point of Use Electric
8.4Buy on Amazon
9EcoSmart ECO MINI 2.5-Gallon 120V
8.3Buy on Amazon

Best EcoSmart Tankless Water Heater

1. Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

If you want to see an almost instant reduction in your energy bills, you can install this EcoSmart ECO 36 36kw 240V Electric Tankless Water Heater and save up to 50% in the coming year. Designed for larger homes, this tankless water heater has more power and can provide you with enough hot water for use in both your bathroom and kitchen, and it can actually provide enough hot water for use in more than one bathroom. Though the box makes it look like a larger water heater, it actually has a compact size that is a fraction of the size of other tankless heaters.

Many shoppers love EcoSmart tankless water heaters because each one has such a great design that will please the eye of anyone who walks by and anyone who uses it. That design features a solid black front with a digital screen on the top and a silver knob on the bottom. It requires just 240 volts of power, which allows it to work with a standard circuit breaker, though it also requires three 40 breakers too.

EcoSmart designed the ECO 36 with ease of use in mind, and you’ll find that it installs so easily that you can do the work yourself without hiring any professional contractors to help. The silver knob on the front makes this incredibly easy to use too because you simply press the button to turn the water heater on and off. Another helpful benefit is that you can rotate the knob in one way to increase the heat and in the opposite direction to decrease the heat, and the digital screen on the front of the water heater has a backlit display that lets you view the temperature, even when the lighting conditions are poor or low.

2. EcoSmart ECO 27 Electric Tankless Water Heater

Traditional water heaters take up so much space that you might have a hard time finding room for your belongings and other things you need to store, but this EcoSmart ECO 27 Electric Tankless Water Heater eliminates this problem because it requires up to 12 cubic feet less space than traditional tank water heaters do. You can install it right on a wall in your basement, laundry room or another space in your home and use the included connections to hook the water heater up to your plumbing lines. It does a good job of pulling water in and running that water across heated components made from copper and other metals before releasing the heated water back into the system.

Older water heaters usually just have a button or a dial that you turn from low to medium or high without actually showing you the temperature, but the ECO 27 shows you the specific temperature on its digital screen. As that screen has a backlit design, you’ll never again worry that you cannot see that temperature because the room is dark or there isn’t much light available. The dial on this water heater turns effortlessly with just a little pressure, and you can select the temperature down to a precise degree.

If you want to switch from Fahrenheit to Celsius degrees, you can give the dial a soft touch or push, and pushing it again will bring back the original degree type. Though it provides lots of warm water for most homes, the amount it provides will depend on the groundwater outside. When used in a home in a warmer climate, the water heater is capable of producing more water for use in multiple sinks and from multiple faucets than when you use it in a home in a cooler climate.

3. Ecosmart ECO 24 KW Electric Tankless Water Heater

EcoSmart tankless hot water heaters like this ECO 24 24 KW at 240-Volt Electric Tankless Water Heater, also called the ECO 24, use the ambient temperature in a home to help heat the water and bring the water to a higher temperature faster. The way it works is pretty simply too, but the warmth and speed that you enjoy will depend on where you live. Warmer climates keep the groundwater at a higher temperature, which allows the water to come out hotter, but the groundwater in cooler climates is a little cooler, which means that the water will take a little longer to come up to the temperature that you desire.

Designed to utilize less space, the ECO 24 uses up to 90% as much space as traditional water heaters with tanks do, which gives you more room for storage. It has an On Demand feature that guarantees you never run out of hot water, and this feature allows the water heater to heat water already in the line to ensure that it comes out faster at the temperature you specified. Though this water heater is suitable for use in commercial buildings, EcoSmart offers a lifetime warranty on this model when installed in residential buildings.

Thanks to the temperature knob on the front, adjusting the temperature on this water heater is something you can do in seconds. Not only does this knob let you change the temperature by one degree at a time, but you can also press down on the knob and switch back and forth between Fahrenheit and Celsius settings. It has a high flow rate that heats more than two gallons of water each minute, and EcoSmart guarantees that this model will work in cooler climates like the Midwest and other areas where groundwater temperatures can reach the freezing point.

4. Ecosmart ECO 18 Electric Tankless Water Heater

Whether you like your water to come out of the tap steaming hot, or you prefer a lower temperature that won’t scald your skin, this EcoSmart ECO 18 Electric Tankless Water Heater is a good choice. It has a temperature range of 80 degrees to 140 degrees Fahrenheit, and every member of your family can easily adjust the temperature range based on their own individual preferences. When used in warmer climates with warmer groundwater temperatures, this water heater can supply enough water to run two showers and two sinks at the same time, though the supply you get will vary based on the groundwater temperature.

As a 99.8% energy efficient hot water heater, the ECO 18 will use much less energy than you currently use and will let you see savings on your next energy bill. The manufacturer includes installation instructions inside the box that walk you through the steps of installing the water heater to help you do the job all on your own. This water heater also has a self-modulating design that allows the water heater to make changes of its own based on your settings to keep the water temperature high.

EcoSmart makes a number of tankless hot water heaters that will work in homes all across the country, but the manufacturer recommends that you check a chart it created to see where you live and which model is right for your region. The ECO 18 is best for homes in the northern part of the country and in certain parts of the Midwest as well as any region where groundwater reaches a temperature of 40 degrees Fahrenheit or higher. With a maximum flow rate of two gallons per minute, this hot water heater is also suitable for homes where just one tap runs at any one time.

5. EcoSmart ECO 11 Electric Tankless Water Heater

As with other EcoSmart tankless water heaters, the maximum flow rate and temperature of the water that comes from the EcoSmart ECO 11 Electric Tankless Water Heater depends on the temperature of the groundwater outside. When the intake water has a temperature of 75 degrees Fahrenheit or higher, the water heater has a maximum flow rate of 3.1 gallons per minute, but if the groundwater has a lower temperature of below 40 degrees Fahrenheit, it will have a maximum flow rate of 1.3 gallons per minute. You should keep in mind that its maximum flow rate can also vary because of conditions like air temperature and the temperature of your home.

To install the ECO 11 in your home, you must have one grounded pole, a 60 amp breaker and a minimum of 57 amps of power, and using the water heater with less power may result in blown circuits or other problems. Provided that this model works with your home and in your region, it will give you an almost endless stream of hot water that you can use in your kitchen and bathroom as well as in other parts of your home. Internal heat exchangers keep the water circulating around the metal to increase the temperature quickly.

While traditional hot water heater run almost continuously, the ECO 11 automatically shuts itself off when you turn off a faucet and automatically turns itself on when it detects that you need hot water, which will help you save significantly on your electric bill. Many of the elements inside are long-lasting but come out easily to help you make any necessary repairs yourself. It also has a digital temperature control that adjusts the temperature by one degree at a time and a knob you can press and hold to switch to Celsius degrees or when resetting the system.

6. EcoSmart 8 KW Electric Tankless Water Heater

Save on valuable storage space as well as on your electric bill with this EcoSmart 8 KW Electric Tankless Water Heater, which requires up to 12 cubic feet less than a traditional tank water heater does and slashes your water heating bills by up to 60% too. Though called a whole home water heater, it’s best for homes with just one bathroom because it has a flow rating of around 1.5 gallons of water per minute. EcoSmart recommends the ECO 8 for use in homes where the groundwater temperature climbs into the high 60s or low 70s, and while you can use it in other regions, you’ll find that this reduces the water temperature and the flow rate.

An included 1/2-inch compression fitting makes it easy to hook this water heater up to your system, but it also comes with an adapter for using it with other systems. If you have any questions, or you have problems following the included instructions, you can contact EcoSmart directly and get installation help. As the ECO 8 is smaller than other hot water heaters from the company, you’ll find that it requires less power and that you can install and use it with just a 40 amp breaker and the 100 amp electrical panels found in most apartments.

Though it uses less power and is smaller than other water heaters, it still comes with the backlit digital display screen on the front that is a trademark of EcoSmart water heaters. Using the silver knob lets you select between a Celsius and Fahrenheit read out and change the temperature by a single degree at a time. It also comes with a lifetime warranty that remains in effect as long as you install it in a residential home.

7. Ecosmart POU 6 Point of Use Electric Tankless Water Heater

There are multiple larger EcoSmart tankless water heaters that are perfect for homes with a lot of square footage, but when you live in a smaller home with just one or two bedrooms, you need something smaller like this EcoSmart POU 6 Point of Use Electric Tankless Water Heater that won’t lead to you wasting a lot of water. Designed to work with either a 220 volt breaker or a 208 volt breaker, it comes with instructions in the box that show you how to install it in your own home. It has a flow controlled heater that essentially means it will automatically adjust the heat and flow rate based on the number of faucets running or the amount of water that you need.

This is easily one of the smallest tankless hot water heaters on the market, and EcoSmart recommends that you install it underneath a sink to get the maximum benefits of the heater. An included sink aerator adjusts the speed and strength of the water coming out and reduces the flow rate down to just 0.5 gallons of water per minute. When used in other applications, it has a maximum flow rate of one gallon of water per minute.

Though it might be a little too small to supply hot water to every room in your home, it’s large enough for use in a guest room bathroom, a half bath or even a recreational vehicle. You can even install and use it with a wet bar to clean up after parties and to keep water on hand for drinking. Suitable for use in areas where groundwater temps climb above 70 degrees Fahrenheit, it will also work in homes and vehicles with inlet water temperatures around 40 degrees Fahrenheit.

8. Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater

One of the smallest EcoSmart tankless water heaters that works in both buildings and vehicles is this EcoSmart POU 3.5 Point of Use Electric Tankless Water Heater, which the manufacturer designed to work with electrical systems. This water heater is so small and compact that you can install it inside a cabinet, beneath a sink or in another hard to reach place. The backlit display on the digital screen is clearly visible in all conditions and shows the current temperature you selected, and the power button has a convenient location right to the side of this screen.

The maximum flow rate of the POU 3.5 is just 0.5 gallons per minute, which is a little too low for showers or baths but strong enough for washing your hands, doing dishes and cleaning. It comes with a sink aerator that attaches to the outtake valve, which directs the flow of water into the sink at the same speed and strength. That aerator makes this water heater a good choice for use in motor homes and wet bars.

As it is so small and compact, this electric tankless water heater will also work in cabins and smaller homes that rely on generators, and if you install it in a more traditional home, you only need a 30 amp breaker. It has a temperature range that climbs up to a maximum of 105 degrees Fahrenheit, and it will still release water at its maximum flow rate when turned all the way up. This tankless water heater comes with a lifetime warranty when used in homes, but it is also suitable for commercial buildings like a retail shop, restaurant or doctor’s office.

9. Ecosmart ECO MINI 2.5 2.5-Gallon 120V Electric Tank Water Heater

The EcoSmart ECO MINI 2.5 2.5-Gallon 120V Electric Mini Tank Water Heater is the absolute smallest hot water heater available from EcoSmart and also one of the smallest hot water heaters from any manufacturer available on the market today. Small feet on the base lift this water heater and keep it from sitting right on the floor, which keeps the heat from burning or damaging your floor. You can use it as a point of use heater and install it right where yo want it or as a buffer heater that lets you store and keep hot water on hand.

It also has an easy to use design that features a switch on the front you turn from one side to the other. A red light comes on when the water heater is off, but the green light on the opposite side comes on as soon as you turn it on. Unlike standard hot water heaters meant to supply enough hot water for a room or whole home, this one stores just 2.5 gallons of hot water inside that you can use for any number of applications.

The ECO MINI 2.5 requires a standard 120 volt outlet to run, which means that you can use it in your home or in a recreational vehicle like a motor home, and you can even use an adapter to hook it up to the cigarette lighter in that vehicle. A pressure relief valve lets you quickly release the pressure inside to keep the MINI from overheating, and its in-line design lets you connect this to a larger tankless heater or a traditional hot water heater for use as an emergency back up.

Our Top Winner

The EcoSmart ECO 36 36kw 240V Electric Tankless Water Heater really is the best of the best when it comes to EcoSmart tankless hot water heaters. As the largest hot water heater available from this company, it provides enough hot water for your kitchen as well as one or more bathrooms.

You can also read about our other models reviews here: