Best Electric Tankless Water Heater For Whole House

There is always a demand for hot or warm water, especially during the cold seasons. In times like this, people will ever want to keep warm, and it is expedient to have a device that can help with that. By using a tankless water heater, you can achieve this. However, sorting one of the Top tankless instantaneous water heaters is not an easy task. So we have made things straightforward. Through this whole article, you will come to know the complete buying guide, and critical things you must know while buying one, and our top 10 shortlists of tankless water heater available in the market. In this article, we discussed the best electric tankless water heater.

In this text, we will be letting you know electric tankless water heater reviews available in the market. We are also going to expose you to some of the key features and essential things to watch out for when you want to purchase this tankless water heating device.


Ecosmart eco 11 electric tankless water heater​

Ecosmart eco 11
Price$ $ $
Dimension3.8 x 8 x 11.5 inches
Weight6.5 pounds
Watt13,000 Watt
Capacity2 Gallon/m
Power SourceElectricity  220-240 Volt

Bosch mini-tank water heater​

Bosch mini-tank water heater
Price$ $ $
Dimension13.8 x 10.8 x 13.8 inches
Weight16.5 pounds
Watt1440 Watt
Capacity2.5 Gallon
Power SourceElectricity 110-120 Volt

Rheem RTE 13 Electric Tankless Water Heater 4 GPM​

Rheem RTE 13 Electric Tankless Water Heater
Price$ $ $
Dimension7.2 x 7.2 x 7.2 inches
Weight7.35 pounds
Watt13,00 Watt
Capacity4 Gallon/m
Power SourceElectricity  220-240 Volt

Stiebel Eltron tankless electric water heater​

Stiebel Eltron tankless electric water heater
Price$ $ $
Dimension21.7 x 20.1 x 9.6 inches
Weight16.5 Pounds
Watt18,000 Watt
Capacity5 Gallon/m
Power SourceElectricity 220-240 Volt

ECO MINI Electric Tank Water Heater​

ECO MINI Electric Tank Water Heater
Price$ $ $
Dimension16.2 x 11 x 11 inches
Weight15.8 pounds
Watt1440 watt
Power SourceElectricity 110-120 Volt

Bosch electric tankless water heater​

Bosch electric tankless water heater
Price$ $ $
Dimension12.2 x 3 x 6.5 inches
Weight5 pounds
Watt3200 Watt
Capacity0.5 Gallon/m
Power SourceElectricity 110-120 Volt

Takagi Indoor Tankless Water Heater​

Takagi Indoor Tankless Water Heater
Price$ $ $
Dimension6.7 x 13.8 x 20.3 inches
Weight38 pounds
Capacity6.6 Gallon/m
Power SourceElectricity 110-120 Volt

Rheem Tankless Water Heater​

Rheem Tankless Water Heater
Price$ $ $
Dimension4 x 9 x 13 inches
Weight8 pounds
Watt13,000 Watt
Capacity1.5 Gallon/m
Power SourceElectricity 2200-240 Volt

Atmor tankless electric water heater​

Atmor tankless electric water heater
Price$ $ $
Dimension9.5 x 4.1 x 11.4 inches
Weight4.65 pounds
Watt14,000 Watt
Capacity2.3 Gallon/m
Power SourceElectricity 220-240 Volt

Titan tankless water heater​

Titan tankless water heater
Price$ $  $ 
Dimension13.8 x 9.8 x 4.8 inches
Weight7.95 pounds
Watt11,000 Watt
Capacity1,3 Gallon/m
Power SourceElectricity 220-240 Volt

Tankless water heaters are called instantaneous water heaters because they help raise the temperature of liquids in no time. Just as the name suggests, a tankless water heater produces hot or warm water directly. It has no storage tank associated with it. Unlike storage water heaters, there are no energy losses involved. With a tankless water heater, you can generate up to 5 gallons of hot water in one minute. Also, an electric tankless water heater is more cost-effective than a storage water heater. The parts of this device are readily available. Hence, any faulty component should replace duly. If well managed and adequately maintained, an electric tankless water heater can last for up to twenty years.


1. Ecosmart eco 11 electric tankless water heater ​

Ecosmart eco 11

Ecosmart is one of the leading producers of electric tankless water heaters. If you do not reside in a prominent place, the ECO 11 is perfect for you. With this device, it is possible to generate two gallons of water in sixty seconds. It doesn’t hold hot water. As the liquid gets heated, it passes through it. The ECO 11 enjoys rave reviews by its users on Amazon. It is because it reduces heat loss and energy loss drastically. Invariably, this implies that you spend less amount of money on heating water. A whopping 64% of users have given this product a 5-star rating. The fact that you use this device doesn’t mean you will pay a massive sum as electricity bill. However, it helps you save money due to reduced energy loss.


  • Easy to install
  • Impeccable heating capacity
  • Sufficient water supply capability
  • Elegant design
  • Sphere parts available


  • Complain of low performance after years
  • Hard to regulate temperature
  • Noisy operation

2. Bosch mini-tank water heater

Bosch mini-tank water heater

This electric water heater is versatile. Either it can mount on the wall or the floor. Also, it can be installed independently or in conjunction with a significant hot water source. This water heater is available in various sizes, and its design is lovely. It is a water heater that can use in kitchenettes, pool houses, garages, and basements. This water heater is durable and lasts long. It is because it is quite easy to maintain. It has a thermal efficiency of 98%. What this means is that there is no energy loss in the form of heat; the device is very well insulated. The design is attractive and beautiful. It can blend perfectly with any existing furniture. It is Mountable on the floor, shelf, wall, under a sink, or within any space.


  • Installation is seamless and secure.
  • Elegant design.
  • Energy-saving.
  • A pressure/relief valve included in the package


  • Users complain about longevity.
  • Produce cloudy and rusty water after a few months of use.
  • It is not unconnected with the anode rod.

3. Rheem electric tankless water heater 4 GPM​

Rheem RTE 13 Electric Tankless Water Heater

This rheem electric tankless water heater is ideal for all kind of homes. It can use in a mobile home. As long as the minimum electrical requirements can fulfil. It doesn’t consume a great deal of electrical power since power only drawn when you need to raise the temperature of a particular volume of water. If there is a problem during installation, you can refer to the user manual. It is sturdy, and the on-unit temperature control allows you to determine the appropriate heating temperature. With this water heater, you are sure to get hot water when and how you need it. Some users have reservations about the constant increase in the price of the product. At a point in time, the amount of the product has raised 81% comparing the past.


  • LED’s let you monitor the functionality of the water heater
  • The design of the heater improves its compactness


  • Price is slightly high.
  • Limited time warranty.
  • Complain about inadequate customer support.

4. Stiebel Eltron tankless electric water heater

Stiebel Eltron tankless electric water heater

This product enjoys rave reviews on Amazon. It developed with the highest level of technology. Its components include a hinged cover, advanced flow control, as well as a flow sensor. With this water heater, you do not have to spend so much on electricity bills because it is a piece of energy-saving equipment. It is quite inexpensive, and it has high thermal efficiency. It means that there is no problem with temperature fluctuation. The Stiebel Eltron Whole House heater is ideal for any home.


  • The parts are replaceable.
  • 3-years warranty for all parts
  • Easy to install and put together
  • Reduce electric bill
  • The temperature of the water can easily control through the dial


  • A little drop in water pressure affects the efficiency of this heater
  • Maintainance costs not included in the warranty
  • Users who reside in Florida say this device is not favourable for use in their area due to the composition of water

5. ECO MINI Electric Tank Water Heater

ECO MINI Electric Tank Water Heater

This heater is characterized by low electricity consumption. It features gauge steel, gauge junction box, requires a thermostat, and it is UL listed. It plugs into a 120V outlet. Hence, it does not make use of a battery. It is made from quality metal and it is powder-coated. To simplify the process of installation, the heater comes with a wiring diagram. The thermostat does not come with the unit, it is sold separately. More than one of this unit can be connected together. It can be used in a bathroom and any other place that requires warmth in the house. It works very well for a 10’ x 12’ room.


  • Very much compatible with reverse osmosis water
  • The design is sleek and attractive
  • Portable and space-saving.
  • Reduce electric bills.
  • Parts are replaceable. (1-Year warranty included)


  • Some users complained of the pressure valve. They say a little force causes it to leak.
  • Installation requires plumbers help.
  • A few users opined that it doesn’t fit into a 120V outlet.

6. Bosch electric tankless water heater​

Bosch electric tankless water heater

This tankless water heater is available in a wide range of sizes. Also, the fact of the elegant design ensures it can fit into different places such as the kitchen, under the sink, and the garage. You do not need to incorporate a pressure or temperature relief valve during the process of installation. If there is a constant need for hot water in places such as your pool house, laundry room, kitchenette, powder room, and many others. Then, this electric tankless water heater is ideal for you. This unit comes with a 5-year warranty.


  • Quite affordable
  • Easy to install
  • The parts are replaceable and readily available
  • You can either mount it vertically or horizontally to save space


  • No thermostat or temperature regulator
  • There is a bit of pressure drop across the unit
  • It cannot fit into a conventional wall plug

7. Takagi Indoor Tankless Water Heater​

Takagi Indoor Tankless Water Heater

Takagi produces various models of tankless water heater, but this is the smallest in size. If you need radiant heat in a small residential apartment, this is the water heater you need. Frankly, you may not get the best out of this product if you live in a relatively big house. There are thermistors in the group that allows you to keep track of temperate changes. Installation and setup instructions are easy to understand. You can install this unit by yourself. It is not hard to do


  • Temperature control by the thermostat.
  • Easy installation.
  • Straightforward control


  • Only ideal for indoor use
  • It may not be suitable for use in cold weather conditions
  • So many users raised eyebrows about the warranty policy

8. Rheem Tankless Water Heater

Rheem Tankless Water Heater

It is another super unit from Rheem. The company is known for producing quality heating and cooling equipment and has been in existence for over a hundred years. If you’ve chosen this water heater, you do not need an overflow line. With this attractively designed tankless water heater, you can never run out of hot water. It doesn’t require a battery. Hence, no battery included. Digital temperature display lets you keep track of temperature changes appropriately.


  • The LED display allows you to monitor the functionality of the unit
  • It works well for a regular size washer
  • Easy to install.
  • Reduce electric bill
  • Elegant design.


  • Although it works well, you may not be able to do two things at a time with this heater.
  • Quite a few users are unsure of its longevity.

9. Atmor tankless electric water heater

Atmor tankless electric water heater

If you live in a small to medium-sized home, this water heater is what you need. This heater uses advanced technology for self-modulation and regulation of water temperature. It can be installed anywhere, whether indoor or outdoor. If you install this heater, you wouldn’t have to wait too long to use hot water. The fact that heating only takes place when the faucet turns on means energy savings and the cost of electricity reduction. The digital panel allows you to control the entire unit just how you want it.


  • You can run up to 4 applications at a time
  • No venting required
  • Easy to setup
  • No need for insulated piping or ducting
  • The heating elements are replaceable


  • Instant hot water is only possible if you install to the point of use
  • It doesn’t come with a pressure relief device
  • Some users aren’t satisfied with customer support.

10. Titan tankless water heater | Titan N-120​

Titan tankless water heater

It is one of the most sought after electric tankless water heaters in the market today. On Amazon, a whopping 66% of users have given it a 5-star rating. The design of this electric tankless water heater is pleasant to the eye. There is a product warranty of just one year on this heater. It cannot compare with other electric water heaters that offer a lifetime warranty. Some users have issues with the digital heat selector that kept changing positions.


  • Portable
  • Space-saving and smart design
  • Reduce electric bill.
  • Durable


  • Warranty for a limited time considering others.
  • Some user face issue with the digital temperature selector

How To Choose An Electric Tankless Water Heater?

In this era of technology, the tankless water heater is a magical, revolutionary innovation. Confidently its enough qualified to replace the majesty of traditional water heaters. However, it is a fundamental rule that each coin has both sides. In the case of a tankless water heater, the law has not changed.  This unique type of instantaneous water heater includes some limitations & drawbacks too. So before you invent one of them inside your home, you need to know some essential facts. We are going to take you through the funnel to let you make crystal clear about the item. This knowledge will help you ensure your decision to buy the best electric tankless hot water heater for your home.

What are the limitations of a tankless water heater?

Well, to make these things understood, we need to know the technology behind this. You have to realize what happens inside a tankless water heater first. Then you able to spot out the logical answer.

The nob you twist to come out the water from the tankless water heater contains the switch of heating elements.  Those heating elements are mainly electric coil or gas burners.  When the water flow starts, the heating elements start working. As the water is flowing through the heating component, the cold water is getting hot. The technical term is as simple as that.

Now think logically, in case of massive water flow, the heating component won’t be able to raise the temperature accurately.  On the other hand, if you demand a certain level of heat, the heater will fail to supply water according to your family’s necessity.

So the tankless water heater has a limit of supplying water in a particular volume as well as raising the temperature at a certain level.

Key things to consider before spending on an electric tankless water heater


Most of the best electric tankless hot water heater isn’t overly pricey. They are pocket-friendly and cost-effective. You wouldn’t want to spend all you’ve got on one equipment; it is a stupid thing to do. The average price of an electric tankless heater ranges between $200 and $650 depending on functionality and product components.

Energy efficiency:

Efficiency has to do with the output you derive from equipment. Before you splash the cash on any heater, be sure that it can serve its intended purpose. An electric tankless water heater that can deliver an efficiency of up to 95% is okay. There are quite a number of them in the market. Electric tankless water heaters help you minimize cost by getting rid of energy losses. That should be the aim. When the heater draws little electrical power, it should be able to deliver an equivalent amount of heat energy.

Safety features:

This is important for both you and your family. You wouldn’t want to spend on something that will expose you and your loved ones unnecessarily. Domestic accidents such as electric shocks and fire can emanate from an electric tankless water heater. Hence, it is essential to make the correct choice. Do not spend on what will bring harm to you.

Heating capacity:

Have it at the back of your mind that heaters are made with volume and space the primary consideration. An electric tankless water heater that built for a little bathtub would not work well for a more significant area or capacity. Know what you want out of an electric water heater before you decide to buy one.


There are many sellers and manufacturers of tankless water heaters in the market today. Hence, it has become more challenging to pick an ideal heater. Also, the risks and financial implications of buying a wrong product means one has to be meticulous before making a choice, and that is the whole essence of this text. We have given you an insight into what some of the best electric tankless water heaters have to offer. Also, weighed their advantages and disadvantages. Analyzing many things we have tried to make you see what you stand to gain or lose. All these efforts are to help you narrow your options.

We hope that Our electric tankless water heater reviews will help you make an informed choice when next you want to spend on an electric tankless water heater.