Best Tankless Electric Water Heater

A tankless electric water heater is the best choice if you are looking for an affordable tankless water heater for your home, which also will save you a lot of money by cutting down your energy bills. On the other hand, it also will allow you to have an endless hot water supply without worrying the limitation of tank size.

Whether you live alone or with family, in a studio apartment or a household with more than one bathroom, there are many options of electric tankless water heaters available to suit your needs.

As you may already know that not every tankless electric water heater is designed equal. Some of the models consume more energy, or some other have a more compact design. So, to choose the right tankless electric water heater for your home, you need to know what you need and what model is suit you the best.

Do not experiment because tankless electric water heaters usually come with a considerably high price. To help you find out your decision, here are some tips and recommendations to consider before you make your purchase.

Electric Tankless Water Heater Products: Comparison Chart

NamePriceRatingkW (Kilowatt)
Stiebel Eltron Tempra 29 is the best electric tankless water heater
View Lowest PriceRead our Review29 kW
Rheem RTEX 13 ranked as #2

Rheem RTEX

View Lowest PriceRead our Review13 kW
EcoSmart ECO 27 ranked as #3

EcoSmart ECO

View Lowest PriceRead our Review27 kW

What to Look When Purchasing Tankless Electric Water Heater

There are dozens of models and types of tankless electric water heater that are available in the market. Here are two key factors that you have to consider before making your purchase.

One of the main reason why people switch from traditional water heater into electric tankless water heater because it saves more energy as its consume less power during operational. Therefore, make sure the efficiency of the electric tankless heater that you are aiming to buy is going to meet your needs

Warranty is an important factor to consider. So, you may want to figure out what kind of warranty it has. Knowing the validity period of the water heater that you are going to buy is also a primary concern.

The durability of electric tankless water heater usually reflects its quality and material and the unit used. Make sure the type of water heater that you are going to buy is durable to avoid the need to repair or replace the parts on the day after. Premium quality of material will make the unit more durable and long length with less maintenance.

Advantages of Electric Tankless Water Heater

Save more energy
The electric tankless water heaters undoubtedly have less operating cost, and it can save up energy consumption up to 20%. There won’t be any standby heat loss that usually occurs in the traditional water heater because with the electric tankless water heater, and the hot water will be delivered on-demand only when you need it.

Save more money
Saving more energy means saving more money. Once you install an electric tankless water heater, you will have lower utility bills. Having this in your house is a smart investment and will save your money in long run.

Longer lifespan
Electric tankless water heaters have longer service life compared to the traditional water heater. The lifespan of these units can typically last 15 years and even more if you have proper maintenance.

Compact measurement
Most of the electric tankless water heater models are designed in a small size. Using these units will not take up many spaces of your house, and you can install it almost everywhere according to your desire.

Fresher and cleaner hot water supply
Because it doesn’t need any tank or storage to keep and heat up the water, the hot water that will be delivered to you is fresh and clean because it’s heated immediately once you want it.

Best Electric Tankless Water Heater Products

The Best Tankless Electric Water Heater is Stiebel Eltron Tempra 29
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Top Pick: Stiebel Eltron Tempra 29

Stiebel Eltron Tempra 29 Plus is one of the best electric tankless water heater that available on the market. Besides the smart and innovative design, it also has an outstanding build quality. Not to mention the efficiency of this unit which makes it become your smart investment for the future.

This model is a perfect choice if you are looking a water heating unit to provide hot water for a more extensive household, such as two or three bathrooms house with high demand for hot water supply.

Moreover, Stiebel Eltron Tempra 29 Plus also has an internal setting which allows this unit in minimizing wasting energy by only using the exact amount of power to heat up a certain amount of water.
Stiebel Eltron Tempra 29 Plus is an excellent choice for high-usage household appliances because you will not need to worry about rationing your hot water usage.

Rheem RTEX 13 is ranked as #2 (budget pick)
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Budget Pick: Rheem RTEX 13

If you are looking for an electric tankless water heater for a smaller house which consists of one to two people, then Rheem RTEX 13 is the right answer for you.

This model is one of the most affordable options but also reliable regarding its quality. It has an ultra-compact measurement which makes it fits even in cramped spaces and almost anywhere in your house, makes this become a great benefit for a smaller house. Rheem RTEX 13 has a high flow rate for the price, which is 4 GPM at its maximum.

Although Rheem RTEX 13 is a new model and hasn’t been on the market for a long time, it already becomes one of the most popular electric tankless water heaters because of its perfect reliability record. However, this is not a good choice if you are living in a cold climate area.


EcoSmart ECO 27 is ranked as #3
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EcoSmart ECO 27

The EcoSmart ECO 27 is considered as the most powerful electric tankless water heater that is available in the market. It is specifically designed to handle an on-demand hot water supply in any climates, include in the coldest climates. However, it also works perfectly well in warm climates.

Most of the buyers buy this model for their vacation properties such as lake houses or cabins. This model is suitable for medium size household. It also equipped with a modulating control system which will adjust its pressure setting and power usage automatically to maintain the energy consumption to be efficient.

As for warranty, EcoSmart ECO 27 has a lifetime warranty, which is the best warranty option. But, if you are looking for an electric tankless water heater that can provide hot water for more than five households at the same time, this model might be not enough for your needs.


A lot of electric tankless water heaters are well-made and well-designed. That is why deciding on what model is the right one for you to buy could be challenging. Picking the most suitable unit for your house is a matter of considering and weighing your overall household needs for hot water supply.

Some factors you may want to look at include the size of your water heater, the price, and also the climate that you live in. Although electric tankless water heaters are easier to install compared to gas-type tankless water heaters, you perhaps still require a professional technician to ensure it is installed correctly and to avoid and faults.

Rheem RTEX 13 is cheapest options if you live in small house with small hot water needs. Whereas Steibel Tempra is the right choice if you live in cold climate. As for EcoSmart ECO, 27 is ideal for the medium-sized home.