Consumer Electronics Water Heaters

Best Electric Tankless Water Heaters for 2018

Are you searching for the best electric tankless water heater for 2018?

First of all, you have a made the right decision by choosing an electric tankless water heater over a traditional water heater.

Second, you’ve come to the right place.

We have done hours of research so that you don’t have to.

In this post, we’ve given you the best electric tankless water heaters that are currently available on the market. We have also explained why they are better than other models out there.

Let us not waste any more time and get right in.

Best Electric Tankless Water Heaters – Comparison Table

Here you can see the best 9 electric tankless electric water heaters available in the market for the year 2018.

Don’t have the time to read everything? Don’t worry.

Jump to our Editor’s Choice

If you do have the time, let’s take a good look at these electric tankless water heaters with a little more detail.

Stiebel Eltron Tempra 29 Plus

Stiebel Eltron Tempra 29 Plus

This one is an easy pick.

The Stiebel Eltron Tempra 29 Plus model is best suited for a house with high hot water demand. We say this because it comes with three heating modules.

The water heater is excellent when it comes to energy efficiency which is an astounding 99%.

The electrical requirements for this model are 240 volts and 100 amps. You will need to use two 50 amp circuit breakers.

The Tempra 29 plus starts from a temperature of 86F and can go up to a maximum temperature of 140F with a water flow of about 8 gallons per minute. But the water flow will depend on the initial temperature of the water.

The model is well built and doesn’t feel cheap.

The device has a display which shows the temperature of the water. There is also a dial which enables you to select an output water temperature according to your needs.

Make no mistake, this model here is an expensive one to most consumers out there. But it is one of the most reliable and the most efficient tankless water heaters, and that’s why we called this an easy pick.

Pros

  • Silent Operation. Makes no noise whatsoever.
  • Control over the temperature of water. Get hot water that matches your needs.
  • Very efficient in energy conservation. Can help in sizeable bill reduction.

Cons

  • Expensive than most tankless water heaters

EcoSmart ECO 27

The EcoSmart ECO 27 model is one of the best electric tankless water heaters out there.

If you are living in a small flat or if your household has less than five members, then this model here is an excellent choice.

The water heater is rated at 36KW and 240 volts. It has four heaters, each with a capacity of 9KW.

You will need a 200 amp total service with three 40 amp double pole breakers. Make sure that your house meets this requirement before making a purchase decision.

There is a digital display that displays the temperature of the water output. You can also adjust the output temperature according to your needs.

If the inlet temperature is less than 37F, then the hot water output would be low at about 2.7GPM. But if the inlet water temperature in your area is higher, then you can expect a better GPM.

The EcoSmart ECO 27 can give a maximum of 7 GPM which is pretty good for the price.

The ECO 27 model is super energy efficient at 99.8%. This will translate into a 50% cut concerning your bills.

You can also avail a lifetime warranty for parts when you do the installation professionally.

Pros

  • Excellent option for medium households with 3 to 5 people.
  • An affordable option when compared to higher end tankless water heaters.
  • The water heater comes with a solid build quality and is durable.

Cons

  • Not a great choice for a large household. If you have more than 5 people, then GPM will go down considerably.

Rheem RTEX-18

The Rheem RTEX-18 is a reliable electric tankless water heater that comes with a good reputation.

This water heater is a neat choice for a medium-sized household. You can run one bathroom and one sink at the same time without losing hot water.

The Rheem RTEX-18 model is rated at 240v and requires two 40 amp breakers.

The model comes with an external digital thermostatic control with an LED display which allows you to adjust the temperature in increments of 1F.

The heater comes with an industrial build and is compact. It can fit in your house without taking a lot of space. There are two heating elements made of copper.

The Rheem RTEX-18 can give you a GPM of 2 at a low inlet temperature. If the inlet temperature is high at about 62F or above, you can expect 3 to 4 GPM.

With a 99.8% energy efficiency, you can expect a considerable saving in your electricity bill.

There is a one-year warranty for parts and a five-year warranty for the heating chamber.

Pros

  • Easy installation and won’t take up a lot of space.
  • Cheaper bills thanks to the 99.8% energy efficiency.
  • More affordable than other high-end models.

Cons

  • Can only run one bathroom and a sink at a time. If you run more points, water will only be warm and not that hot.

SioGreen IR260

If you are looking for a budget tankless water heater for your small household, then the SioGreen IR260 might fit the bill.

SioGreen IR260 is a bit different than other electric tankless water heaters.

This water heater makes use of infrared for heating, so there is no contact with metals. This, in turn, prevents the possibility of corrosion and limescale deposits.

If the water in your region is hard, you should be facing the limescale issue with your heaters. In this case, the SioGreen IR260 is a good solution.

The heater is rated at 240 volts and 6KW. The total amperage draw is 30A.

There are four power levels that range from 1.5KW to 6KW. You can adjust the temperature of the water between these levels to match your needs. There is also a temperature display which is handy.

Being an on-demand water heater, it will not produce more hot water than you need.

The water heater doesn’t take up a lot of space. Installation is straightforward, and you can do it without any professional help.

Pros

  • There are no metals which means you don’t have to deal with problems like corrosion.
  • The model is best suited in areas with hard water. The IR technology will not gather limescale deposits.
  • The SioGreen IR260 is much cheaper than other electric tankless water heaters in the market.

Cons

  • The water heater may not be a good choice for a medium or a large household.


Ecosmart ECO 36

EcoSmart ECO 36 is a flagship offering from EcoSmart.

We’ve already discussed the younger brother ECO 27. The ECO 36 model is more powerful and is one of the best electric tankless water heaters you can find.

The rating of the heater is 36KW and 240 volts. The amperage draw is 150 amps, and you will need four 40 amp double pole breakers.

You have control over the temperature and can adjust the temperature in 1-degree increments.

Let’s talk about the performance of the ECO 36.

Being a premium water heater, this model can be considered as a solid option for the whole house.

You can use this water heater for a medium household with 5 to 7 people. Two people can use water continuously without losing hot water.

When the inlet water temperature is low at about 37F, you can expect a GPM of 3.5, and that’s pretty impressive. At inlet temperatures of around 70F, the GPM can go as high as 7.5 GPM.

Like its younger brother, the ECO 36 also comes with a lifetime warranty for its parts when installed by a professional.

Pros

  • Copper and stainless steel components offer durability and long life.
  • 99.6% energy efficiency which will reduce a good portion of your electricity bill.
  • You can get the perfect temperature you fancy as you can adjust the temperature by increments of 1F.

Cons

  • Even though installation is simple, you still will have to get it done professionally to obtain the lifetime warranty. If not, the warranty can become a bit tricky.

Rheem RTEX-13

Rated at 240 volts and 13 KW, the Rheem RTEX-13 is an electric tankless water heater that is perfect for your medium-sized household.

This tankless water heater comes with a nice, solid build and is very compact for what it does.

You can easily fix it above the sink as it won’t take up a lot of space.

There are two copper heating elements that are both durable and self-serviceable.

How well does this heater perform?

Well, for a moderate inlet temperature, you can expect a GPM of 4 which is not too shabby.

If you want to operate two showers at once, then the GPM will go down. But you can work on the sink and use a shower at the same time without any considerable drop in the water output.

There is a digital display that shows you the temperature of the outlet water. You can use the knob control below the screen to adjust the temperature to tailor your needs.

If there are not more than four members in your household, then this heater will take good care of your hot water needs.

The heater comes with an energy efficiency of 99.8%. Expect a bit savings in your next electricity bill.

Pros

  • One of the most affordable electric tankless water heaters on the market.
  • The heater is very compact and doesn’t take up a lot of space.
  • Installation is very simple. No need to call for professional help.

Cons

  • Not a good choice for a household with more than 5 members.

Titan SCR2 N-120

The Titan SCR2 N-120 is one of the cheapest electric tankless water heaters you can get.

The SCR2 N-20 model is rated at 240 volts and 11.8 KW. You will need a double pole 60A breaker.

The heater comes with self-modulating flow technology that allows you to save up to 50% of your water heating costs.

If you are living alone or if you are in a medium-sized household, then this electric water heater is a good fit.

With an inlet temperature of 55F, the heater can give you a GPM of 3.5. If the inlet temperature is cooler than usual, then the GPM will take a hit.

Usually, you can easily connect a bath and a sink and use them together without any issues. You don’t have to wait more than 30 seconds for hot water to arrive.

Instead of a dial found in other heaters, you have a blue and a red button. These buttons can be used to increase or decrease the outlet temperature of the water.

The heater comes with a 10-year warranty on water carrying parts and a 1-year warranty on other components.

Pros

  • Installation is easy and doesn’t take a lot of time.
  • The heater is super compact and takes very little space.
  • Probably the most affordable electric tankless water heater for a small or medium-sized household.

Cons

  • The temperature controls can be a bit hard to get used to at first.

Stiebel Eltron DHC E-12

The Stiebel Eltron DHC E-12 is the second model in this list from the German manufacturer.

The DHC E-12 is a much more affordable model than the Tempra 29 plus and is less convincing (in comparison) as well.

This water heater comes with a rating of 12 KW and 240 volts. The total amperage draw is 60 amps so make sure you have the right breakers.

You would have probably guessed that this model is a good fit only for small and medium-sized families.

You wouldn’t be wrong.

With dimensions of 4.1 x 7.9 x 14.2 inches, the model weighs just around 6 pounds. It is a compact heater and will fit anywhere without taking up much space.

There is a knob that allows you to adjust the water temperature. You can change the temperature to your liking from 86F to 140F.

The minimum water flow rate to activate the heater is 0.264GPM. You can operate four taps together without any issues.

You can also connect one bath and one faucet and still get hot water.

There is a limited warranty of 3 years on parts which is handy.

Pros

  • Water heater installation can be done by the owner himself.
  • Good option to replace your traditional heater as it is affordable in comparison to other tankless water heater models.
  • Perfect for small and mid-sized households.

Cons

  • Not suitable for areas with hard water.

BOSCH Tronic 6000 C

The BOSCH Tronic 6000 C is a whole house electric tankless water heater that can supply hot water to the entire house whenever there is a demand.

The heater is rated at 18 KW and 240 volts and is suitable for both residential and commercial usage.

This water heater comes with scale prevention technology so you can use this in areas with hard water.

The Tronic 6000 C model is a good fit for households with less than 5 or 4 members.

With an inlet temperature of 55F, the heater can provide an output GPM of 2.6 which should be enough to power a shower and a faucet at the same time.

When the inlet temperature goes does, the water flow does take a hit. For example, when the temperature rise required is about 90F, the output GPM is reduced to about 1.5 which is not that serviceable.

So if you are in colder areas, this heater may not be that great.

The required minimum flow rate to activate the heater is 0.6GPM.

There is a 5-year limited warranty for the heating modules. There is also a 2-year limited warranty for other parts and components against defects in workmanship or materials.

Pros

  • Affordable whole house electric tankless electric heater.
  • Energy efficiency of 97% can help to save a bit on your electricity bill.
  • As it has scale prevention technology, you can use this heater even in areas with hard water.

Cons

  • The installation has to be done by a professional. You will also need a 120 amp circuit breaker for the proper functioning of the unit.

Best Electric Tankless Water Heater – Buying Guide

Not sure which water heater is the right one for you?

No problem.

We have written this buying guide with the idea of helping you to find the best electric tankless water heater that suits your every need.

There are three factors you must consider when looking for a tankless water heater

  • Hot water need
  • Region’s climate
  • Budget

Hot Water Need

First, let’s talk about your hot water need.

If you are a single guy or a couple living in a flat, then any water heater can do the job for you.

The idea is that you don’t have to spend a lot of money to get what you want.

If your household is made up of 3 to 5 people, then it is a good idea to invest in a decent tankless electric water heater.

Any heater with a rating of 17KW or closer would get the job done.

But if you are a part of a big-sized household, then you need a powerful water heater with a rating of around 36KW.

A heater with that much power will take care of your hot water needs without any hiccups.

Region’s Climate

The climate in your area is another important factor.

If you are in a warm area, the water heater will not have to do a lot of work. In this case, you can go with a not-so-powerful water heater.

But if you are in a colder climate, then a powerful heater becomes a necessity.

The climate in your area will affect not only the output temperature of the water but also the amount of water you get as output.

In a warm area, you can get a good GPM without the heater doing much work. So you will be fine with a heater that comes with a GPM of 2.5 or 3.

But in a cold region, you need to go with a heater that is rated as 6 or more GPM. Only then, you will be able to get around 4 to 6 GPM without any problems.

We recommend that you should go with water heaters that offer 20% or 30% more GPM than what you require.

This way you can get a good supply of hot water even when the heater misses its mark.

Most of the manufacturers have a climate chart on their site. You can check your region in that chart and see what their recommendation is to fine-tune your selection.

Budget

Budget is key to anyone’s heater purchase.

Though you are saving a lot of money when switching from traditional tank water heaters to electric tankless water heaters, you still have to pay a premium.

If you are in a small or medium-sized household, then you can spend less than $350 or $400 for a suitable water heater.

For a large household, you will have to spend more. This is also true for medium-sized families in extremely cold regions.

One thing to remember is that with an electric tankless water heater, you are going to save a lot of money in the long run in the form of electricity bills and maintenance.

So be sure not to make a cheaper purchase to save a few bucks upfront as it can cost you later.

Always go for reputed brands that offer a good warranty even if they cost a bit more than your original budget.

Editor’s Choice

We know that’s a lot of information to take in.

And to ask you to take a decision after all that information is a bit unfair.

That’s why we have one electric tankless water heater that no one can go wrong with.

Our Editor’s Choice is : Stiebel Eltron Tempra 29 Plus

Stiebel Eltron Tempra 29 Plus

Though on the expensive side, you can’t go wrong with this model.

With German engineering at its heart, this Stiebel Eltron Tempra Plus model delivers a good amount of hot water really quick.

You can operate two showers at the same time without losing both hot water and its flow.

You can use this special link below to purchase this model with a discount price.

Benefits of Electric Tankless Water Heaters

Switching from traditional water heaters to electric tankless water heaters gives you a number of benefits.

Let’s discuss them below.

Space Saver

Traditional tank water heaters can take up a lot of space.

The electric tankless water heaters, on the other hand, are very compact.

Most of the heaters are so compact, you can just fit them around your sink. Even if you want them somewhere else, they will not take up much space, and there won’t be any noise, usually.

Energy Efficiency

These modern water heaters consume a lot less energy when compared to the traditional water heaters.

With an efficiency of 98% and above (in most cases), your electricity consumption can nearly half, and this will reflect dearly on the bills as well.

East Installation

If you have the electrical requirements ready, you can install the heaters all by yourself.

Only a few heaters require professional installation, and that too is mainly for warranty reasons.

Instant Hot Water

These electric tankless water heaters can provide you with an instant and endless supply of hot water.

The heater will give you hot water only when you need it. This means the heater won’t heat the water all the times.

Most heaters will provide you hot water within 30 seconds with good water output (GPM).

This is clearly an advantage over the tank water heaters.

In traditional water heaters, it can take a while for hot water to come heating can take up time (depending on the size of the tank).

This problem is non-existent in tankless water heaters.


That’s it from our side.

We hope you were able to find the best electric tankless water heater that matches your needs.

Let us know which model impressed you the most.

Have a horror story about any particular model?

Share that as well. We’d love to hear that from you.

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