Best Electric Tankless Water Heaters 2018

Best Electric Tankless Water Heater 

Best Tankless Water Heater – Living comfortably in the contemporary world can often times be very expensive. Machines are being built to make our daily tasks easier, but usually at the cost of our wallet and the planet’s well-being. It’s a good thing, however, that people are becoming aware of the fact that we can have our cake and eat it too, with innovative inventions that are energy efficient, go easy on our money, and allow us to live in modern, 21st century bliss.

Inventions such as electric tankless water heaters (also known as demand-type water heaters) are changing the way we go about our lives. What’s so great about tankless water heaters, you ask? It’s simple.

When you want to shower with hot water, your heating tank heats up and stores the water so that it’s ready to use at your disposal. They can either heat up the water electrically or with gas. This is all well and good, but it causes a lot of inconveniences. First of all, the energy used to store and keep the water heated while you don’t use it is extremely costly. And not only do you have to wait for the water to heat up to use it, it eventually runs out and leaves you with the cold water. This has been a problem for many large families. In the mornings, those that take a bath or shower first end up using up all the hot water and leave none for the rest.

However, it no longer has to be this way with tankless water heaters. Tankless water heaters heat up the water directly so that you can have hot water ready whenever you need it, without the wait, and without the hassles of a storage-based water heater.

We’ve managed to find the top 10 best tankless water heaters and reviewed them down below. If you have any further questions about tankless water heaters, don’t worry. We’ll answer them further down.

1. Stiebel Eltron Tempra: Best Electric Tankless Water Heater

Stiebel-Eltron-Tempra-Best-Tankless-Water-HeaterThis German-built water heater is one of the best out there. Stiebel Eltron have been pioneers in tankless heater technology for 90 years and are still the leading tankless water heater manufacturers in the world. This specific model has various features like:

Temperature control: You can control the heat and have the heater deliver the water with any temperature between 86 and 140 degrees.

Tempra advanced flow control: This feature automatically sends the hot water at the perfect temperature.

Anti-scalding: You can set the temperature to a certain heat so you can prevent scalding and keep you and your loved ones safe.

Pros & Features:

  • Temperature control
  • No fluctuating heat due to the advanced flow control
  • No ventilation required when installing
  • Doesn’t make a sound


  • Might cost extra for installation
  • Might experience a weaker water flow, especially when running two showers at once

2. EcoSmart ECO 27Best Budget Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater

One of the few problems with tankless water heaters is that, if you buy the wrong one, it cannot produce the sufficient amount of energy to heat up the water and there is a noticeable drop in performance. This mostly happens in cold climates when people don’t buy an electric, tankless water heater with enough voltage to heat the water in nearly freezing temperatures. The EcoSmart ECO 27 is perfect for those living in colder climates. Here are the features:

Self-modulating technology: With this incredible patented technology, the EcoSmart adjusts the energy needed to heat water depending on how much water the user actually uses. Because of this, the EcoSmart water heater has been able to reduce people’s electricity bill by 50%.

Lots of power: The ability to heat up 3 gallons per minute is why this tankless water heater in particular is favored among those with larger households and colder climates.

Compact design: It doesn’t need much space for it to be installed.


  • Only needs as little as 12 cubic feet to be installed
  • Self-modulating technology saves you a lot of energy and money
  • Great for cold weather
  • Lifetime warranty
  • Allows you to set the temperature between 80 to 140 degrees


  • Warranty will be void if you install it yourself, so you will need to pay extra for installation fees
  • Slight delay in heat temperature

3. Takagi: Best Indoor Tankless Water Heater

Takagi T KJr2 IN NG

A good option for smaller homes is the Takagi tankless water heater, made by a Japanese company. It runs on natural gas. Here are the features:

Temperature check: The system automatically keeps the temperature in check so there’s consistency with the water temperature.

Air fuel ratio sensor: This allows the water heater to keep track of harmful pollution.

No failure: The heater has freeze protection and it also automatically shuts down when the temperature gets too high, reducing the risk of failure and ensuring longevity.


  • Great for small houses and apartments
  • Extremely easy to set up yourself
  • Durable
  • Great with warm weather


  • Warranty will be void if you install it yourself
  • Not good for larger households
  • Expensive to install if you decide to hire someone
  • Chances of a gas leak if overworked too much (more than two showers at the same time)

4. Rinnai RL75iN – Best Natural Gas Water Heater

Rinnai RL75iN Natural Gas Tankless Water HeaterThere is only one word that can describe the Rinnai water heater: Heavy duty. This tankless water heater is not only used in residential areas, but also in commercial areas due to its astonishing 7.5 gallon per minute capacity. Let’s take a look at the features:

Large capacity: This tankless water heater is capable of heating water from 3 showers and a sink at once, so it is great for larger homes.

Easy to use controller: The simple controller is Wi-Fi ready and allows you to control the temperature with the push of a button.


  • Compact design
  • Large capacity
  • Can be powered by propane if you don’t like to use natural gas


  • Very expensive
  • Professional installation is mandatory
  • Delay in receiving the hot water

5. Titan SCR2 N-120Best Point of Use Tankless Water Heater

Titan Electric Tankless Water HeaterA popular option for those with small apartments in warmer climates is the Titan water heater of 220 volts. Check out the features:

Simple: The Titan water heater is extremely simple, more so than other tankless water heaters. The temperature control panel is placed at the front of the system.

Stand-by mode: Stand-by mode allows you to stop the function of the heater in case you don’t want hot water but don’t want to go through the hassle of changing the water temperature.


  • Great for warm climates
  • Simple to install
  • Easy to use
  • Affordable
  • Compact
  • Good for rental homes and apartments


  • No remote control
  • Not a lot of water flow
  • Bad for colder climates

6. Eccotemp Systems L5Best Portable Tankless Water Heater

Eccotemp Systems L5 Tankless Water HeaterAll this time, we’ve been talking about tankless water heaters for the inside of your home, but what about outside? Fret not, for the company Eccotemp has your back. This portable tankless water machine is excellent for getting instant water outside your home, so you can wash your car, your pets, or just shower outside with nice, warm water as if you were indoors. Here are the special features for this incredible device:

Shut-off timer: The Eccotemp L5 has a 20-minute automatic shut-off timer, so you don’t waste more energy than you need to when you’re done using it.

Light weight: Since this is for outdoor purposes, the Eccotemp L5 is extremely light (only 19 pounds) and compact, perfect to take for camping trips or just to set up in your backyard.

Accessories: This tankless water heater comes with a shower head and a garden hose adapter.

Easy to understand: There are two dials, one to control the water flow and one that serves as a gas regulator.


  • Great for the outdoors
  • Easy to set up and use
  • Simple manual dials


  • Battery powered
  • Doesn’t do well is extremely cold or windy environments

7. Noritz Indoor Condensing VentEnergy Efficient And Powerful with Condensing Function

Noritz NRC98 DV NG Direct 9.8Highly efficient and durable, this Japanese-made tankless water heater is able to heat a whopping 9.8 gallons of water per minute. Let’s look at the features:

Flexibility: The Noritz NRC98 allows for flexible (not to mention affordable) venting. It can use either PVC or CPVC piping.

Good for cold climates, even better with warmer climates: With norther weather, this tankless water heater can heat up to 2 baths. In southern weather, it can heat up 3 to 3.5 showers.

Switch it up: The digital control panel has an option where you can switch from Fahrenheit to Celsius and back again.

No pressure loss: The Noritz NRC98 is one of the few tankless water heaters that consistently gives you a strong water flow.

Safety first: This tankless water heater is incredibly safe because of the overheat prevention device, heat detector, and fan rotation detector.


  • Flexible installment
  • Good for hot and cold climates
  • Large water heating capacity
  • Great safety measures
  • 18-year warranty


  • Slight delay in receiving the hot water
  • Costs a lot to repair if broken

8. Rheem RTE 13: Best Mini-Tankless Electric Water Heater

Rheem RTE 13 Electric Tankless Water HeaterIf you’re looking for something simple yet efficient for your small apartment, look no further than the Rheem RTE 13. Despite the size, this tankless water heater works just as well as the bigger ones. The features for this system are:

Compact: The light weight, small design is matched great with the fact that this water heater is great for smaller apartments. It lakes up little space and doesn’t get in the way.

Easy to install: You can easily install this tankless water heat even if you have minimal plumbing or electrical experience.

No ventilation needed: No ventilation is needed to install this devise in your home and have hot water instantly at your disposal.


  • Doesn’t take up too much space
  • No ventilation needed
  • Saves up space
  • Easy to use


  • Occasionally inconsistent water flow

9. SioGreen IR288: Best Tankless Water Heater (Hot) Runner-up

SioGreen IR288 POU Infrared Electric HeaterMany water heaters heat up the water in spaces with metallic materials, causing corrosion and eventually depleting the efficiency of the water heater and of the water itself, even going as far as to gather bacteria in the tank and shower-head, especially for those that live in areas where you receive hard water. SioGreen wishes to fix that. Here are the features for the SioGreen IR288 Tankless Water Heater:

No metallic tube: Water heaters usually heat the water through a metallic tube. This can eventually lead to corrosion. SioGreen, however, uses Quartz heating tubes, which are recyclable and prevent hard water deposit build up.

Automatic or manual: You can switch between automatic or manual mode.


  • Works well with colder and warmer climates
  • Easy to install
  • Environmentally friendly
  • Solves most hard water problems


  • Requires professional installment
  • Expensive to install

10. Eccotemp FVI-12-NG: High Capacity Gas Tankless Water Heater

Eccotemp FVI 12 NG High Capacity Gas Tankless Water HeaterAnother great option for those that need instant hot water in their homes is the Eccotemp FVI-12-NG. Let’s take a look at some of the features:

Design: This Eccotemp water heater has a sleek design that helps you save space.

Flexible installation: You can either have this water heater in a vertical area in your home or mounted up on a wall, whichever suits you.

Simple controls: It has simple dials and buttons that help you control the temperature manually.


  • Easy to use
  • Space saving design
  • Many ways to install it
  • Lifetime warranty


  • Requires professional installation
  • Warranty will be void if not cleaned correctly

Why Buy Tankless Water Heaters? Buying Guide

In Europe and the East, many people have already switched to tankless water heaters and North Americans are starting to catch on as well. The many benefits that going tankless gives you makes taking a simple shower, washing the dishes, or washing the car much easier. However, buying a tankless water heater isn’t something you can just decide to do on the spot. You’ll have to do a lot of research in order to get the right one, or else you might end up wasting thousands of dollars on a water heater that doesn’t even do the job right.Best Tankless Water Heater Reviews

Don’t know where to start? Don’t worry. We’ll do all the hard work for you. Read this buying guide in order to organize yourself and figure out which tankless water heater is best for you.

What to Look for:


The most important thing to consider before buying a tankless water heater is the size and gpm. If you get the wrong size, it can cause serious problems with the water pressure and heat flow when using it. To know which water heater is correct for you, calculate how many showers and sinks are in your house and how many of those showers and sinks are in use at the same time. Ask yourself various questions and observe the daily habits of you and your family. Is someone usually washing the dishes while another person showers? Do two people usually shower in separate bathroom at the same time?

Next, you’ll want to determine the gpm (gallons per minute) of your water flow. The more gallons per minute. The bigger the capacity.

For small homes (1-2 showers), tankless water heaters like Titan, Takagi and Eccotemp are perfect. For larger homes (2-3 showers), Stiebel Eltron, Noritz, and Rinnai are great.

best water heater


When buying a tankless water heater, it’s very tempting to just go for the cheapest one. In the end, they all do the same thing, don’t they? The thing is, not only do you have to take into account the cost of the actual device, but also, installation costs. Would you rather buy a cheap water heater but pay a lot for installation from specialists, or an expensive one with cheap installation from your average plumber? Will you need to replace your pipes? PVC or CPVC?


Buying tankless water heaters in colder climates can be a bit difficult, mostly because when the temperature is very cold, the water heater can get overworked and stop functioning. Many tankless water heater manufacturers have a detailed map that shows you how well their product performs in your state.


Electric Vs. Gas

Tankless water heaters can either be gas-fueled or electric. Powering your tankless water heater with natural gas is much more affordable in the long run but buying and installing electric ones are much cheaper. Not to mention that electric tankless water heaters are more durable and perform better than their gas counterparts.


Something else to consider is if you will want to install the water heater yourself. How easy is it to install the water heater yourself? Will the warranty be void if you install it yourself? There are some tankless heaters that will only void the warranty if you pay for it to be installed but later on install it in some other place yourself.

Your water

Do you receive hard water or soft water? Hard water contains minerals that can have a chemical reaction with the metallic tubes in your tankless water heater unit. This can lead to a very short lifespan for your water heater and can cause bacteria to accumulate in the unit. Check which type of water you receive and buy accordingly. Companies like SioGreen have water heaters with Quartz tubes to specifically counter this problem.

How does a tankless water heater work?

A tankless water heater works by installing the heating unit and power source near the place you want the hot water to come out from. When you open the tap, the water passes through the heating unit, where it is instantly heated up either with gas or with electricity.

How do you install a tankless water heater?

The best thing to do would be to hire a professional, for safety reasons and to keep the warranty. If you want to do it yourself, however, contact the manufacturer so they can guide you through the process and give you information. You might want to check with your town or city to see if you need some kind of permit in order to install it, especially if the water heater is from a foreign company.

What is the difference between hard and soft water?

Hard water is water that contains more minerals, like calcium, chalk, and lime. Soft water mostly only contains sodium.

Tankless Water Heaters lasting Compared to Traditional Water Heaters:

Water heaters with tanks can last about 12-15 years until their performance begins to deteriorate. Tankless water heaters can last more than 20 years.

How much does a tankless water heater cost?

A small tankless water heater can cost anywhere between $115 to $300. A bigger unit usually costs around $300 to $1,500.

Installation Cost:

Installation cost can reach up to $700, depending on the company and type of tankless water heater. Electric water heaters usually cost less than those powered by gas.Best Tankless Water Heaters


Benefits of having a tankless water heater:

  • Infinite amount of hot water
  • Not having to a long time for the water to heat up
  • Saves energy
  • Saves you money
  • They last longer than water heaters with tanks
  • Eliminates stand-by losses
  • Don’t take up too much space

Disadvantages of Tankless Water Heater:

  • Can be expensive
  • The water pressure might weaken if too many water outlets are used at once
  • The pilot light can be a waste of energy


Tankless water heaters are a great way to have instant hot water without the tediousness of conventional water heaters. No more arguing with your family over who wastes all the hot water!

Quite a bit of research needs to be done before buying, and once you decide which one you do want, quite a bit of money needs to be handed over. However, once you receive your electricity bill and see how much less you have to pay every month, we’re sure you’ll find it was all worth it.

One Reply to “Best Electric Tankless Water Heaters 2018”

  1. Great write up guys! Stiebel Eltron tops the list in my book, then Rinnai would be second, the both of these are great for large families or heavy hot water usage households. ECO Smart and Ecotemp are a good option for people on a budget, smaller households or light hot water usage.

    Thanks Guys!

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