Best Electric Tankless Water Heaters

Systems for heating, cooling, and plumbing are all changing. Tankless electric water heaters are at the cutting edge of the plumbing industry and have swiftly taken over as the industry standard. However, deciding which water heater to get and which is the finest might be challenging.

Because there are so many alternatives, picking the finest electric tankless water heater may be challenging. Making the proper decision seems unattainable with everything to take into account. Your selection will be easier after reading this article, which compares the top electric tankless water heaters currently available.

You can select the ideal water heater for your house using the information in this article as a reference. We’ll discuss everything to consider, including size, price, and everything else.

Tempra Best Electric Tankless Water Heaters

The Advantages of a Tankless Water Heater

The advantages of electric tankless water heaters must be understood before we examine the best models. Even if you aren’t contemplating purchasing this kind of water heater, you may after learning what they are capable of.

Energy Savings

Electric tankless water heaters are significantly more energy-efficient than traditional water heaters since they continuously create hot water. Electric water heaters without tanks are between 25 and 30 per cent more efficient than those with tanks or storage.

Spending less on utilities

You may significantly reduce your monthly energy bills by increasing efficiency. Traditional water heaters heat water continuously and operate nonstop to maintain a hot temperature. Tankless heaters, on the other hand, only run while they are heating water.

While the energy savings are impossible to measure, most electric versions have a minimum 98% efficiency rating or more.

They accomplish this as needed, so tankless water heaters only sometimes operate to keep water at a stable temperature.


Typically, tank-style water heaters will last anywhere from 8 to 14 years. However, tankless electric water heaters may last 15 to 25 years with proper maintenance and care.

Continuous Hot Water

One of the finest characteristics of tankless water heaters is the continual hot water supply as long as the water heater is running. Most standard water heaters can only hold between 30 and 50 gallons of hot water at a time, and they take 1 to 2 hours to create new hot water.

Space Saver

Tankless water heaters feature smaller designs that occupy less room than tanked water heaters and look considerably nicer. You may mount them on a wall that is out of the way and doesn’t intrude on the living space.

Easier to Maintain

Although tankless electric water heaters should still need yearly or bi-annual maintenance, they require less than standard water heaters. It would be best to flush a tankless water heater every two years, but this is a straightforward operation that takes a trained plumber less than an hour.

So that you know the fantastic benefits of having an electric tankless water heater in your house, let’s delve into the top alternatives on the market!

Best Overall Electric Tankless Water Heater Option

Stiebel Eltron 239223 Tankless Water Heater – Tempra 29 Plus – Electric, On Demand Hot Water, Eco, White, 23

Stiebel Eltron 239223 Tankless Water Heater

Stiebel Eltron Tankless Water Heater

If you’re looking for the greatest overall electric tankless water heater, go no further than the Stiebel Eltron Tankless Water Heater. This water heater is one of the most powerful on the market and can create unlimited hot water for four individual showers simultaneously.

Although most homeowners prefer the bigger versions, the Stiebel is also available in a tiny form, great for individual rooms or close locations.

This water heater can output up to 7.5 gallons per minute and heat water to 140 degrees Fahrenheit. Best of all, Stiebel Eltron Tankless Water Heaters are 99% efficient and relatively reasonable for how excellent they are.

Most versions are available for less than $800, so you won’t break the bank when you get one.

This water heater can output up to 7.5 gallons per minute and heat water to 140 degrees Fahrenheit. Best of all, Stiebel Eltron Tankless Water Heaters are 99% efficient and relatively reasonable for how excellent they are.

Most versions are available for less than $800, so you won’t break the bank when you get one.

Most bigger versions require a 240-volt circuit, consuming at least two or three breaker spots in your panel box. We welcome you to read our Stiebel Eltron review.

Best Electric Tankless Water Heater for a Budget

EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology

EcoSmart ECO 18 Electric Tankless Water Heater

EcoSmart Eco 18 Tankless Electric Water Heater

You nevertheless want to trade quality for price when it comes to tankless electric water heaters. However, not everyone can break the bank for their water heater, so it’s essential to have backup solutions.

The EcoSmart Eco 18 Tankless Water Heater is more economical than the Stiebel but doesn’t lose quality for a lesser price.

The EcoSmart Eco 18 is the smallest of four tankless water heater alternatives in this series of products. You may also select from Eco 24, 27, or 36. The total gallons of water consumed each minute range from 2.7 to 6.5.

The Eco 18, the smallest version, is ideal for compact houses with just one or two bathrooms and a small number of tenants.

However, you should make a wider choice if your home is larger and consumes a lot of hot water at once. Regarding pool heaters, the EcoSmart brand is quite well-liked, but their tankless water heater range is dominating the market. They have a lifetime warranty and are small, effective, and inexpensive.

The main drawback of EcoSmart is the lack of a tankless water heater option that can accommodate large households. Compared to most of its rivals, its biggest water heater only generates 6.5 gallons per minute.

Water heaters that are EcoSmart consume the same amount of power as their bigger equivalents. The majority of EcoSmart water heaters, however, cost $100 to $200 less than comparable models. Please read our evaluation of Ecosmart.

For smaller homes, the best electric tankless water heater

EcoSmart ECO 11 Electric Tankless Water Heater. The EcoSmart is a powerful tankless heater for kitchens or bathrooms and features 13KW at 240 Volts with Self Modulating Technology.

Best Electric Tankless Water Heater for Smaller Homes

Tankless water heater EcoSmart Eco 11

EcoSmart makes the finest electric tankless water heater for small households and the best tankless water heater at a reasonable price. A water heater typically producing more than 7 gallons per minute may only be necessary for some. Smaller houses may easily get by with the EcoSmart Eco 11 Tankless Water Heater.

The efficiency of this water heater is 99.8%, and it can pump out 2 to 3.1 gallons of water per minute. That is just enough water to run a shower and a second faucet concurrently.

For married couples living in an apartment or modest house, though, that’s more than plenty. Like other tankless water heaters, the EcoSmart Eco 11 can heat water to a high temperature.

The drawback of this water heater is that it has difficulty operating throughout the winter in colder areas. Your shower water might be warmer if the incoming water temperature falls below 72 degrees, which it probably will in colder regions.

However, this water heater is quite well-liked compared to most other alternatives and consumes less power.

Most Effective Electric Tankless Water Heater for Bigger Homes

The EcoSmart and the Stiebel electric tankless water heaters are excellent choices for houses of all sizes. Depending on the size you select, some individuals will need help to keep up with larger houses. Look at another wonderful choice for larger homes to delight you and your family.

Eemax EEM24036 Electric Tankless Water Heater, 36Kw, Blue

Best Electric Tankless Water Heater for Larger Homes

Tankless water heater Eemax 36kW

One of the lesser-known yet excellent solutions for a whole-house water heating system is the Eemax 36kW Electric Tankless Water Heater. The Eemax can deliver hot water to at least five showers at once at 36,000 volts.

This water heater will provide a steady hot water supply to each bathroom for as long as you live in a house with five bathrooms, a rare luxury.

The Eemax 36kW can generate up to 6 gallons of hot water per minute and is reasonably priced.

Eemax also provides a one-year warranty on each part and a five-year warranty against leaks. This water heater may independently increase or decrease the electric flow, using only what is required.

As with all sizable tankless electric water heaters, you should anticipate using at least three breaker slots in your main electrical panel. You should know that Eemax struggles to keep the hot water flowing in chilly locations.

The maximum flow rate drops to 3 gallons of water per minute if the incoming water temperature is too low.

Best Electric Tankless Water Heaters for Point of Use

Bosch Thermotechnology 7736505870, 7.2kW, Bosch US7-2R Tronic 3000 Electric Tankless Water Heater

Best Point-of-Use Electric Tankless Water Heaters

Electric Tankless Water Heater Bosch Tronic 3000

The Bosch Tronic 3000 Electric Tankless Water Heater is ideal for use in kitchens and bathrooms.

A temperature rise of 45 to 65 degrees may generate as much as 0.8 to 1.1 gallons of hot water every minute. Consider this if you reside in a colder climate where the groundwater is hard. It is incredibly space-efficient (98% efficient), compact, and has a small footprint.

The Bosch Tronic 3000 Tankless water heater is also reasonably priced, which is the best part. If you have plumbing skills, you can buy the water heater for less than $170 and install it yourself.

There is only one need for the Bosch direct connect heater: cold water. It is ideal for places like a pool house, basement, or outside patio where installing a hot water connection is impossible. Even a boat or an RV may have one installed.

The main breaker box or subpanel must be directly hardwired to the Bosch Tronic.

For cold climates, the best electric tankless water heater

Bigger is usually preferable when picking a water heater for cold and freezing weather. On-demand heaters that are larger have stronger heating elements than smaller ones.

The bigger sizes are ideal for cold weather and are available in each water heater we’ve examined.

For instance, while not quite as good as the Stiebel, the EcoSmart Eco 36 and the Stiebel Eltron 36 Plus are excellent for chilly climates.

The Rheem Performance Tankless Water Heater Series, particularly the Rheem 240V Performance Tankless Water Heater, is a strong competitor for electric tankless water heaters.

However, a tankless water heater powered by natural gas or propane will often work better for most individuals living in colder areas.

You can utilize tankless electric models. However, many units placed to offset the output loss will provide the optimum performance.

Additional Top Tankless Water Heaters to Think About

Rheem RETEX-36 Performance 36 kw Self-Modulating 6 GPM Electric Tankless Water Heater

Top Tankless Water Heaters to Consider

Performance Tankless Water Heater by Rheem

The Rheem Performance Tankless Water Heater is the second-best option behind the Stiebel Tankless Water Heater, which won our award for the best overall product.

Rheem is a fantastic all-around business that offers competitive prices for HVAC, plumbing, and electrical equipment. Their Performance Tankless Water Heater is an excellent product, although they’re typically considered a nice middle-of-the-road alternative.

The Rheem Performance model cannot surpass the Stiebel Tankless Water Heater in terms of functionality. Many homeowners favour Rheem Performance since it is even cheaper than the Stiebel.

They generate the same hot water quantity, operate at the same flow rate, and have comparable efficiency ratings. You can choose either choice if you want a great tankless electric water heater.

The 6GPM output Rheem Performance unit seen above weighs only approximately 19 pounds. It has four burners and requires four 220v breakers due to its size.

Therefore, you could require an electrical panel update or a sub-panel. It’s the ideal whole-house electric tankless water heater solution if you reside in a warmer area. Please read our review on Rheem.

Titan N-160 SCR3 Tankless Water Heater Electric 16 KW 220 Volt 66 AMP

Titan N-160 Electric Tankless Water Heater

Electric Tankless Water Heater Titan N-160

Also, consider the Titan N-160 Electric Tankless Water Heater if your scenario calls for a smaller tankless water heater alternative. It is 99% efficient and can produce up to four gallons of hot water per minute (4GPM).

The Titan N-160 is appropriate for a small kitchen or bathroom. You’ll be alright if you reside in a compact home, apartment, or condo with a kitchen and one bathroom. You can reduce the amount of hot water produced by half in regions with groundwater temperatures under 55 degrees.

Although less suited for frigid areas, Titan water heaters are similarly simple to install, maintain, and repair. It is difficult to maintain in cold regions, but the minimum entering temperature of the water should be at least 65 degrees Fahrenheit.

Point-of-use devices are unparalleled in terms of how simple they are to install. After connecting the water pipes, put the device into an electrical socket. Hardwiring is required for larger models.

On the other hand, the Titan is reasonably priced and needs a pair of 60-amp breakers to function. Check out our review of Titan as well.

Purchase Guide

Knowing the best electric tankless water heaters is critical, but making the right choice is also crucial. You should know the finest ways to seek a water heater because not all are ideal in all circumstances.

Size and Volume

Your required size should be one of your first considerations when selecting an electric tankless water heater. Numerous water heater models are available from Stiebel, Rheem, EcoSmart, and most other manufacturers. Size and capacity are mostly determined by flow rate and the number of kilowatts of power needed.

The size of your home and family will determine the size and capacity of the tankless water heater you require. You’ll need a larger water heater if you want to use several showers, faucets, washing machines, and other plumbing fixtures at once.

Here is a table that displays the flow rates of various plumbing fittings in your home to assist you in making your choice.

Plumbing Fixture Flow Rate in Gallons Per Minute
Dishwasher 0.5-1.5
Bathroom Faucet 2.5
Tub 4.0
Shower 2.5
Toilet 2.2-3.0
Washing Machine 1.0-2.5
Kitchen Faucet 2.5

Using this table, you may determine the right tankless water heater by adding up how many plumbing fittings you intend to run simultaneously.

Overall Effectiveness

The overall effectiveness of the water heater is another important consideration. Despite being far more efficient than a traditional electric water heater, there are still some differences between tankless electric heaters.

For instance, EcoSmartRheem, and Ecotouch are a little more effective than Stiebel and Bosch. However, they are all far more efficient than other varieties, and any of them will help you save your energy costs.


Regarding tankless electric water heaters, one of the most crucial factors is how well they operate in cold areas.

Nearly all tankless water heaters will function well in warmer climates where the incoming water has a temperature of at least 70 degrees Fahrenheit. However, when the incoming temperature is below 65 degrees, the water heater’s performance suffers significantly.

It’s crucial to remember that gas-powered tankless water heaters can be a superior choice in regions with constant freezing temperatures. More than electric ones, gas tankless water heaters may increase the temperature of the water.

Gas water heaters, however, are less effective than electric ones and have higher monthly operating costs.

Costs of Installation and Repair

The fact that electric tankless water heaters are significantly simpler to install than their gas counterparts is another significant benefit of choosing one.

Installation costs are lower than gas water heaters, and the water and electrical connections are easy to use and access. Additionally, installation costs and time are reduced since electric water heaters don’t need vents outdoors.

On the other hand, tankless electric water heaters come in either 120 or 240-volt models. In bigger, tankless water heater types, each burner needs a separate 240-volt circuit. Some even call for three or more specific breakers, which increases the original cost.

Some electric tankless water heaters require two to eight breaker spots in your electrical service panel since they are bigger, more powerful, and have greater flow rates. This can drastically increase installation expenses.

Contrarily, 120-volt water heaters normally only need one or two breaker spots to operate. A normal or GFI electrical outlet can be used with under-sink equipment.

If you have a tiny panel box and are constrained by space and voltage, choosing a smaller tankless water heater is sensible.

Tankless water heater type

Tankless water heaters come in two fundamental varieties: whole-house and point-of-use. As its name suggests, whole-house tankless water heaters are big enough to provide hot water to every room in your house. On the other hand, point-of-use water heaters are often more compact and made to serve water to a specific location.

Tankless water heaters installed under the sink are the best choice for immediately providing limitless hot water. A continual supply of rapid hot water can be installed near a specific bathroom, kitchen, or laundry room.

Before investing in an electric tankless water heater, it’s critical to establish your hot water goals.

electric tankless water heater

Questions and Answers

Electric tankless water heaters’ efficiency is…? Most electric tankless water heaters are between 25 and 35 per cent more efficient than conventional ones.

Tankless electric water heaters: are they worthwhile? Your living circumstances will determine whether or not an electric tankless water heater is useful. It might not be useful to install a tankless water heater if the cost of installation, use, and maintenance is more than the amount of money you would save on electricity.

An electric tankless water heater may be worthwhile if you use a lot of hot water.

Will you save money with an electric tankless water heater? Your monthly utility costs will drop if you use electric water heating, which is also better for the environment. If you choose a tankless water heater over a gas tankless water heater, you should consider paying anywhere from 25 to 50% less per month.

Where may an electric tankless water heater be installed? Tankless water heaters are often placed on walls inside buildings. Similar to how a tanked water heater is put, they are generally placed close to your plumbing supply pipes. If required, you may even put your tankless water heater outside.


Electric tankless water heaters are a cutting-edge innovation in plumbing that is swiftly taking over the country. Because only some have access to natural gas or reasonably priced propane, their only choice for powering their tankless water heater is electricity.

You may choose your electric tankless water heater by reviewing the names and brands on this list and considering the relevant aspects.