What Is The Best Brand Of Tankless Water Heater

Best Tankless Water Heaters Of February 2022

Take into consideration how your family will utilize the tankless water heater when attempting to choose where to begin your search for the finest tankless water heater. You may be considering completely replacing your old tank water heater, in which case a large-capacity whole-house tankless water heater may be the ideal option for you. In the case of an extension, wet-bar installation, or the elimination of a long plumbing supply line, you may find that a smaller point-of-use water heater is the best choice for your needs.


The capacity of a tankless water heater is measured in gallons per minute of hot water it can supply at a given time. Once you’ve determined whether you want a whole-house water heater or a point-of-use water heater, you’ll need to figure out how much hot water you’ll need and how much hot water your water heater will need to deliver. The size of your new tankless water heater will be determined by this factor. How big a tankless water heater you need depends on a number of factors, including the number of people living in your house, the desired temperature rise, the maximum flow rate, and the climate in your neighborhood.

Power Source

The power source you choose will have an impact on the entire cost of your tankless water heater. Energy savings are realized over the long term with tankless water heaters as opposed to standard water heaters with a tank. It is possible that the amount of money they save will be determined by the type of energy sources accessible to you. Making a decision on which power source will be used to run your tankless water heater might be difficult if you have access to both natural gas and 240-volt electricity.

Water heaters that are powered by electricity will be less expensive to purchase and install than those that are fueled by natural gas or propane.

The Only Tankless Water Heater Buying Guide You Need

Note from the editors: We receive a commission from affiliate links on Forbes Advisor. The thoughts and ratings of our editors are not influenced by commissions. Unlike traditional water heaters, tankless water heaters are relatively new household gadgets that ensure you always have hot water on hand while taking up the least amount of space and consuming the least amount of energy. In comparison to a typical storage tank-type water heater, tankless water heaters may be up to 34 percent more energy efficient, resulting in annual savings of up to $100 for the average family.

Additionally, you may be interested in the tankless water heaters available at Home Depot.

Price, customer rating, maximum GPM, heating capacity (in BTUs), and Energy Star certification were all taken into consideration while compiling this top-five ranking.

What Is a Tankless Water Heater?

Tankless water heaters, also known as demand-type water heaters or instantaneous water heaters, are freestanding machines that heat the water in your house almost quickly on demand. Temperature rises in your plumbing system because of thermal conductivity when water passes through the heater and into the system. Tankless water heaters, in contrast to typical storage tank water heaters, do not have a reserve of water available. It’s also no surprise that many homes choose tankless water heaters because they can supply a virtually endless flow of hot water on a continuous basis.

Tankless Water Heater Cost

Tankless water heaters are approximately twice as expensive as traditional storage tank water heaters when purchased outright. Tankless water heaters, on the other hand, are less expensive in the long term. The entire cost of a tankless water heater is determined by the size of the unit and the kind of fuel used. Tankless water heaters fueled by natural gas range in price from $1,000 to $1,500, while electric models cost between $500 and $1,500. Installing a tank professionally is an additional expense that might vary depending on who you hire, how large the tank is, and how complicated your system is (i.e.

A tankless water heater installation might cost anywhere between $2,500 and $4,500 on average.

Types of Tankless Water Heaters

Tankless water heaters are available in a variety of configurations, each with its own set of pros and downsides to consider. Consider the pros and cons of each kind before making a decision on your new water heater.


Propane or natural gas-powered tankless water heaters may heat water more quickly than electric tankless water heaters because they can soften the water more quickly. Gas and propane heaters are likewise less expensive than electric electricity, but they require more installation and maintenance than electric heaters and are less energy efficient.


Over time, gas water heaters are more efficient than electric water heaters, but electric water heaters are less expensive to install in most cases. They also do not necessitate the installation of a ventilation system, which means that they do not have to be installed in an area where there are already pipes. Electric water heaters may be put practically anywhere, including in tight places like bathrooms and kitchens.


Installing your tankless water heater indoors will ensure that it is not exposed to the elements for an extended period of time. It is preferable to have an indoor water heater if you reside in a climate with often changing and harsh weather conditions. Because indoor heaters require ventilation tubes to guide airflow, the cost of installing them will be higher than usual.


The best results are obtained by using outdoor water heaters in residences located in moderate weather.

They are self-ventilating, which eliminates the need for additional ventilation pipes. Even though outdoor water heaters are built to endure the elements, such as the wind, the rain, and the snow, they do require more maintenance than interior water heaters.


Condensing tankless water heaters save money by eliminating the need for costly flue pipes and venting materials by collecting heat from the exhaust before releasing it into the venting system. They then use the heat that has been removed as an additional source of heat to heat water. Generally speaking, condensing tankless water heaters are more expensive to acquire than their non-condensing counterparts in terms of initial purchase price. However, because they have cheaper installation costs and greater energy efficiency, the overall cost is lower in the long term with these alternatives.


In contrast to condensing water heaters, which utilize heat exchangers to heat water, non-condensing water heaters exhaust their exhaust outside. They require stainless steel flue pipes in order to resist the heat generated by the exhaust, which increases the cost of installation. Although non-condensing water heaters are generally more expensive to install than condensing water heaters, non-condensing water heaters are less expensive to purchase up front.

You May Also Be Interested In Tankless Water Heaters Available On Home Depot

Testimonials from customers Exceptionally well-written Performance Platinum 9.5 GPM Liquid Propane Water Heater by Rheem Performance Platinum 9.5 GPM Liquid Propane Water Heater by Rheem 3Rinnai RU199iP RU Model Series 3Rinnai RU199iP RU Model Series 3Rinnai RU199iP RU Model Series 3Rinnai RU199iP RU Model Series 3Rinnai RU199iP RU Model Series Testimonials from customers Exceptionally well-written 3Rinnai RU199iP RU Model Series4Rinnai V53DeP V Model Series4Rinnai V53DeP V Model Series5Rinnai RL75eP RL Model Series6Rinnai RL75eP RL Model Series7Rinnai RL75eP RL Model Series8Rinnai RL75eP RL Model Series9Rinnai RL75eP Testimonials from customers Exceptionally well-written Model Series: Rinnai RL75eP RL Model Rinnai RL75eP If you’re considering purchasing a propane tankless water heater, you may feel overwhelmed by the number of options available.

Price, customer rating, maximum GPM, heating capacity (in BTUs), and Energy Star certification were all taken into consideration while compiling this top-five ranking.

What to Consider When Buying a Tankless Water Heater

Tankless water heaters are available in a variety of sizes on the market. The best one for your house is determined by the size of your family and, consequently, the amount of hot water you will require. Having one that is too tiny will result in less hot water being available to everyone. Having one that is overly huge will result in it being more expensive to maintain than required. You can figure out the appropriate size for your house by calculating how many fixtures you will want to operate at the same time and how much hot water each one consumes individually.

You may choose between a single tankless water heater for the entire house and multiple smaller point-of-use water heaters that are each tailored to serve a specific appliance or faucet.

Point-of-use heaters are often put as close as possible to the appliance to which they are supplying hot water, minimizing lag time and allowing you to utilize your water without having to wait for it to heat up.

Fuel Type

Tankless water heaters, whether gas or electric, are both good alternatives, but each has its own set of advantages and disadvantages. Electric water heaters are less expensive and require less maintenance than gas water heaters, but they are capable of heating a greater volume of water at a faster rate than electric water heaters at any given moment. Due to the fact that electric heaters do not require venting, they may be installed nearly anyplace in your home. It’s important to bear in mind that if you have a high demand for hot water, you may need to improve your electrical system to match the additional power consumption by your water heater.

Consult with a knowledgeable specialist to discover which type of gasoline is most appropriate for your needs.


Every year, we recommend that you get your tankless hot water heater serviced by a qualified technician at the very least. If you reside in a particularly cold climate or if your water is continuously hard, you should increase this to twice a year. Although electricity-powered heaters require less maintenance than gas-powered heaters, we nevertheless recommend that you get them examined by a professional to ensure that everything is in working order before using them. When searching for a new tankless water heater, keep this additional expense in mind.

DIY vs. Hire a Pro

Tankless water heater installation is not a do-it-yourself activity. Your home may need to be modified in order to accommodate your new water heater, which frequently necessitates the installation of new wiring and gas lines. Gas and electricity are extremely risky to work with, thus we strongly advise that you leave this endeavor to the professionals. Depending on the municipality, professional water heater installation may be required. A professional will be aware of and adhere to all current codes pertaining to issues such as carbon monoxide emissions, thermal resistance, venting, and other related issues.

Additionally, the majority of specialists can ensure that you purchase the proper water heater for your house, so you don’t have to waste time attempting to install an unsuitable water heater on your own.

Top Tankless Water Heater Brands

Now that you’ve learned what to look for in a tankless water heater, you’re ready to begin your search for the ideal model for your household. Before purchasing a water heater, do extensive research on the product. There are a few well-known tankless water heater brands on the market today, all of which provide high-quality goods. Make use of this list to get your search off to a good start in the proper direction. The following are the best tankless water heater brands:

Compare Quotes From Top-rated Water Heater Installers

Estimates are provided without obligation.

The Best Tankless Water Heater in February 2022 (Reviews)

It might be challenging to make a decision on a tankless water heater. There are hundreds of models and brands available, as well as a plethora of industry jargon that might be difficult to comprehend. That’s why we devoted hundreds of hours to researching and assessing the top water heaters available on the market. In previous guides, we’ve discussed topics such as tankless water heater installation and costs, as well as electric water heaters. We’ve also written about the trustyhybrid water heater, which we believe is the greatest form of water heater on the market right now.

We will attempt to answer the following question: What is the greatest tankless water heater?

The best tankless water heater

We looked nearly every tankless water heater on the market and our favorite is theRheem Performance 27 kw tankless electric water heater (5.6 GPM). Not only is it the greatest tankless electric water heater available, but it is also the best solution in general.

What we like

  • A corrosion-resistant component — One of the most common reasons that tankless water heaters fail is because “hard water” leads to corrosion in the components. Because there are no manufacturer warranties that cover this, it is critical to choose a water heater that is constructed of corrosion-resistant materials. And Rheem is known for making some of the greatest. The Rheem Performance tankless water heater is extremely energy efficient, which means that even at low intake temperatures, you’ll get a lot of GPMs out of a $500 water heater
  • High GPMs for a $500 water heater Good value—While Rheem’s tankless water heaters aren’t as inexpensive as EcoSmart’s models, they are still reasonably priced when compared to other manufacturers such as Stiebel, making them one of the finest value alternatives available.
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Check out this page to discover more about tankless (on-demand) water heaters, including pricing, installation, and how to assess them: tankless (on-demand) water heaters. The Price of a Tankless Water Heater

Rheem vs. EcoSmart

Rheem Performance 27 kw and EcoSmart 27 kw are somewhat similar models in terms of features and performance. Both are widely regarded as the greatest tankless electric water heaters currently available on the market. However, there was one element that distinguished the Rheem from the EcoSmart: it was more corrosion resistant.

“Hard” water leads to corrosion

Many cities in the United States have water that contains minerals that can accumulate in a hot water heater and eventually damage the tank or other components. (By looking at this map, you can see how hard your water is.) All of Rheem’s tankless water heaters are constructed of corrosion-resistant metal, which means that they are less prone to leak as a result of the presence of “hard water.” EcoSmart’s tankless water heaters, on the other hand, are built of copper, which means they are susceptible to corrosion.

EcoSmart’s warranty doesn’t cover corrosion

“SUCH WARRANTIES DO NOT COVER: Product failure caused by liming, silt accumulation, chemical corrosion, chlorine/chloride corrosion, or freezing,” according to EcoSmart’s guarantee. As a result, the guarantee for EcoSmart does not cover the most likely method by which it will fail.

EcoSmart has bad customer service

The heating components of your EcoSmart may corrode, and if this occurs, customer care will inform you that you should have bathed them in vinegar every six months (which is quite the inconvenience). It is for this reason that EcoSmart’s goods receive a large number of negative evaluations on the internet, such as this recent Amazon review: “I wish I had never purchased this thing in the first place. During the course of nearly three years, I’ve had to replace the heater elements twice, each time incurring a cost of approximately $250 for the components ($85 for two elements) plus work for each occurrence.

They do, however, routinely obtain higher ratings than EcoSmart tankless water heaters, which are a close second. And this is primarily owing to the high quality of their construction.

Rheem vs. Stiebel

Among the companies claiming to provide the highest-quality products is Stiebel, a German business with headquarters in Berlin. We compared the Rheem Performance 27 kw to the Stiebel Eltron Tempra 24 Plus to see which was more efficient. The Stiebel tankless water heater costs $620, which is $115 more than the Rheem and $145 more than the EcoSmart tankless water heater. The Stiebel Eltron Tempra, like the Rheem, is constructed of corrosion-resistant materials to provide long service life. As a result, it is a superior choice to the EcoSmart.

Best tankless gas water heater

Gas water heaters are not recommended for installation (see why below). However, if you absolutely must use a natural gas tankless water heater, we believe the Rheem Performance Platinum 8.4 GPMis the best option.

Why it’s the best option

  • An energy-saving function is included in the Rheem Performance Platinum, which may help you save up to 1,000 gallons of water each year. Energy efficiency—When compared to a regular gas water heater, Rheem’s tankless gas water heater has an Energy Star universal energy factor (UEF) of 0.93, which means it may save you $1,100 over the course of 12 years. (It’s important to note that this is far less than the $3,000-5,000 that a hybrid water heater may save.) High-quality product—Rheem is one of the oldest water heater manufacturers in the world, which means they’ve had a long time to iron out any flaws in their designs and manufacturing processes. They are well-known for producing high-quality items and providing excellent customer service.

Why we don’t recommend tankless gas water heaters

  • They’re really dangerous— Carbon monoxide (CO) and nitrogen dioxide (NO2) are produced by gas water heaters (NO2). Coal tar poisoning sends thousands of individuals to the hospital each year, and it claims the lives of hundreds of others. In addition, according to health experts, children who grow up in households with gas appliances are 40 percent more likely to develop asthma than children who do not. Gas prices are volatile and expected to grow in the near future— Natural gas prices can fluctuate by as much as 100% in a single year. Furthermore, the majority of analysts believe that prices will continue to climb over the next few decades. Electricity, on the other hand, is expected to grow more affordable. Natural gas is harmful to the environment since it releases CO2 and methane, which contributes to climate change. No2, another pollutant produced by gas appliances, makes the air dirtier and less healthful both outdoors and within dwellings
  • In addition, gas appliances emit NO2.

Heat pump water heaters are regarded to be the most energy-efficient water heaters available, and are thus the preferred choice for the majority of homes.

Learn more about water heaters

Throughout the years, we’ve written extensively on water heaters, covering topics ranging from tankless water heater installation to what we believe to be the greatest water heaters available: heat pump water heaters. If you still have questions, you may go to one of those guidelines, or if you’re interested in learning more about additional methods to improve the energy efficiency of your house, you can refer to our guides on heat pumps and LED lighting.

The Best Tankless Water Heaters for Your Money

There’s nothing more frustrating than getting into the shower only to discover that there’s no hot water left. If you have a tankless water heater in your house, it may be possible to eliminate this hassle by supplying hot water instantaneously once a faucet is opened. Tankless water heaters are also more compact, energy efficient, and have longer lifespans than water heaters that use a large storage tank as a storage vessel. Typical tank water heaters have a storage capacity of between 20 and 80 gallons of hot water, with 50 gallons being the most common configuration.

In general, a shower consumes around two gallons of water every minute, thus a 10-minute shower would consume 20 gallons of water.

A residence with a conventional 50-gallon water tank might have 80 percent of its capacity depleted in a matter of minutes if the tank was completely depleted during the storm.

In contrast, tankless water heaters detect when a faucet is opened and heat the water on demand using either electric or gas power to keep the faucet running.

As long as you don’t overload the heater by running too many appliances or taps at the same time, you’ll have an infinite supply of hot water.

Tankless vs. tank water heaters

There are several advantages to using a tankless water heater that are not restricted to the volume of hot water it can deliver. For the purpose of keeping the stored water warm, tank heaters are always operating. Because a tankless water heater only functions when there is a demand for hot water, the device stays inactive at all other times of the day. According to the United States Department of Energy, this increases their energy efficiency by between 24 and 34 percent. Tankless heaters are also substantially smaller than traditional heaters.

  • A tank water heater with a 50-gallon storage capacity, on the other hand, can reach heights of more than 6′ and diameters of more than 20″.
  • Tankless units have a lifespan of more than 20 years, whereas tank units have a lifespan of 10 to 15 years.
  • Tankless water heaters may cost upwards of $2,000, whilst a tank water heater might cost between $400 and $600.
  • The overall heating capacity of a tankless device is also dependent on the temperature of the groundwater in your location.
  • As a result, a tankless heater that meets the demands of your home throughout the warmer months of the year may fall short when the temperatures drop.
  • Consider all of this while considering whether to go with a tankless or a traditional water heater — or when determining which tankless water heater is best for your particular situation.

Tankless water heater buying guide

In order to determine which tankless water heater will best meet your household’s needs, you must first determine how much hot water will be consumed during peak usage, followed by the anticipated “temperature rise” requirement, which is the amount of time the incoming water must be heated in order to reach the desired temperature. The type of fuel that a heater burns is particularly essential since it impacts the heating capacity of the unit, as well as the expenses of installation and maintenance of the device.

  • The gallons per minute (GPM), often known as the water flow rate, is a measurement of how many gallons come out of a faucet in one minute.
  • It is necessary to consider how many appliances or faucets are regularly in use at the same time in order to do this.
  • Having a heater that can handle at least 8 GPM would be necessary if you wanted to take two hot showers and run the dishwasher at the same time.
  • The temperature is rising.
  • A water heater that can raise the temperature of incoming water by at least 40 degrees Celsius is required if you live in a region where the groundwater is 60 degrees and want it to be heated up to 100 degrees.
  • In colder areas, less hot water will be provided since the unit will struggle to raise the temperature of the water.
  • The GPM capacity of a heater, which is determined by the needed temperature rise, is often included in the owner’s handbook or product specification sheet provided by the manufacturer.

The sort of fuel.

Tankless water heaters fuelled by natural gas offer a greater heating capability than electric water heaters.

As previously stated, a high GPM is required not just for large homes, but also for colder areas.

They do, however, necessitate a greater initial financial outlay.

Electric tankless heaters, on the other hand, offer significantly reduced initial installation expenses.

They are also more energy efficient than gas-powered heaters (by as much as 5 percent or more), and their installation and annual maintenance are easier and less expensive than those of gas-powered heaters.

Their total GPM might reduce significantly in cold weather due to the fact that they have a lesser heating capacity than their gas-powered competitors.

When groundwater temperatures reach 60° or higher, an electric heater with a flow rate of 6 GPM may be more than adequate. However, if the groundwater temperature drops to 40° or below, its capacity may be reduced to only 2 GPM or less.

Best tankless water heaters

The Rinnai RUR160iN, which runs on natural gas, is designed to be as efficient as possible. Because it is a condensing tankless water heater, it catches and reuses exhaust gas, allowing it to take full use of the heat it generates, earning it the Energy Star certification for efficiency and performance. The second someone opens a faucet, tankless water heaters begin heating the water; but, hot water may take some time to reach fixtures that are positioned far away from the heater. Water is wasted in the majority of situations because you are allowing it to flow while you wait for it to heat up.

  1. The RUR160iN is also equipped with certain cutting-edge technical features.
  2. The heater reacts to voice instructions from Amazon’s Alexa or Google’s Google Home.
  3. The RUR160iN (which retails for around $1,800) is a natural gas-powered water heater that can provide up to 9 GPM of hot water.
  4. A greater GPM, on the other hand, is advised for houses with more than four occupants.
  5. Take a look at theRUR160iPorRUR199iP if you live in a home with propane lines.

2. Editor’s pick:Rinnai RU130iN

Also from the Rinnai brand, this Energy Star-certified heater is designed to catch and repurpose exhaust gas in order to maximize energy efficiency and reduce operating costs. Operating it at a rate of around 4 GPM will cost you only about $133 per year. Keep in mind, however, that keeping the heater’s capacity at 4 GPM or below is merely a guideline for efficiency. In fact, the RU130iN can heat up to 7 GPM of water, which is enough to run two low-flow showers and the dishwasher at the same time in hotter climates.

While the RUR130iN does not come equipped with Wi-Fi capabilities out of the box, you may upgrade your system by purchasing the Control R Wi-Fi Module ($120).

In addition, you might use the app to start the heater’s recirculation function (provided you install an external pump).

Although this model is powered by natural gas, the RU series also includes units that are powered by propane. If your home need more hot water than that, there are versions from the same series that can deliver 9, 10, and even 11 GPM of hot water.

3. Best for low prices:EcoSmart Eco 18 Electric Tankless Water Heater

The EcoSmart Eco 18 water heater, which sells for $400 or less, is strong enough to heat up to 4.3 GPM of water, which is plenty for a family of two in warmer climes. In addition, it can provide hot water for a single shower at a time in locations where groundwater temperatures are as low as 52 degrees. This electric tankless heater will not significantly increase your power cost. It maintains a constant level of energy usage throughout the day. According to the fixture being used, a flow sensor measures how much water needs to be heated at any one moment and adjusts the system to utilize just the amount of energy necessary to satisfy the demand and maintain the target temperature.

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Please keep in mind that its 4 GPM capacity may not be sufficient for families with more than two persons, or for households in extremely cold environments.

4. Best electric tankless water heater:Rheem RTEX-24

Despite the fact that gas-powered tankless heaters are often less expensive to operate than their electric equivalents, they might be more expensive to install. Additionally, not all residences are equipped with gas lines and ventilation systems. It’s possible that an electric water heater will be the best option for you in this case. Electric water heaters from Rheem are well-known for their long life, great efficiency, and large storage capacity. For example, the RTEX-24 can generate up to 6 GPM, which is sufficient for a family of up to four people.

The RTEX-24 has a 99.8 percent energy efficiency rating, which is exceptional.

Tankless water heaters that do not use condensing technology are only approximately 80% efficient.

In order to conserve energy, it detects the flow needs of running faucets and adjusts its power output to consume just the amount of energy necessary at the time.

5. Best point-of-use heater:Bosch Tronic 3000

Water heaters, whether gas or electric, are often situated in the basement or utility room of a house and provide hot water to all of the faucets and appliances in the house. Water heaters situated at a specific water source, whether it’s a showerhead or a sink, are called point-of-use heaters since they exclusively heat the water at that location. If you already have a central water heating system, you might think that this is superfluous. However, it is possible that hot water will take up to 10 seconds or more to reach all areas of the house.

The Bosch Tronic 3000 may be disguised under a sink, within a cabinet, or in any other area that is out of sight of the public (as long as its supply line reaches its target faucet).

This decreases the length of time people have to wait and the quantity of water that is wasted.

Others use it in outdoor restrooms or barns, among other places. Another advantage of this sort of heater is that it does not necessitate the use of a professional installer. You can just connect the machine into a typical 120v wall outlet and you’ll be set to go.

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The Best Electric Tankless Water Heaters in 2021 – Review by Woodsmith

Despite the fact that tankless water heaters may not appear to be all that different at first glance, if you want to have hot water at home, you need think about what you want to do with your future water heater.

Things to consider before buying a tankless water heater

Tankless water heaters are not all the same size, and some are larger than others. In reality, the size of a water heater is mostly determined by the internal circuits and systems that are present within the appliance. Some may be able to fit within your tiny shower room, while others may demand you to install them in a more open space, depending on the manufacturer.


Beyond the size of the heater, you’ll also want to consider the form of the heater itself. Water heaters are typically rectangular in design, which makes them easy to place on a bathroom wall or beside a sink, which is where they are most usually seen in homes. Some heaters, on the other hand, are formed differently as a result of the existence of additional components, such as a small tank. When selecting whether or not to purchase a heater, think about where you want to put it.


Water heaters are designed to do one thing only: heat water. However, it does not rule out the possibility of their performing additional functions. Water heaters with digital thermostats provide a more precise indication of the temperature, and some models even have a self-modulating mechanism that ensures that the water is always at the proper temperature. These options aren’t absolutely required, but they can come in helpful on a variety of circumstances.


Water heaters are not always portable; however, some are meant to be, and you may desire the option of transporting your water heater with you when traveling or if you want to use it in more than one area. These sorts of heaters, on the other hand, are typically powered by natural gas or propane, so use caution when using them.

Tankless water heater price ranges

Tankless water heaters are reasonably priced, with some costing as low as $100. Despite their low cost, these water heaters are capable of being fitted with sophisticated thermostats and touch controls. The price of certain devices starts at $200 and may go up to $300 if they have extra capabilities such as self-modulation. The most costly water heaters can cost as much as $400 per unit, depending on the model. Generally speaking, the price of tankless water heaters varies from one manufacturer to the next, although there are exceptions.

How we choose the best canopy tents

Tankless water heaters are selected based on the fuel that drives them, the energy efficiency of the unit, the amenities that come with the unit, and user evaluations.

Best Tankless Water Heaters in 2022 – Review by Old House Journal

We were able to select the most appropriate tankless water heater for the normal demands of the ordinary individual in our study.

However, because there are hundreds of various types and sizes available, you will need to consider a few important considerations before making your final decision on which tankless hot water heating unit or system to purchase.

What should a person know before they purchase a tankless water heater?

Before you even consider purchasing a tankless water heater, it is critical to examine the following factors:

  • The sort of fuel that will be used to power the water heater
  • Each unit’s mounting position, size, and water flow rate are all different. Indication of the function for which the water heater will be utilized

Our guide to tankless water heaters is provided below. This article will quickly describe how a tankless water heater works, what you should know before purchasing one, and the many operational aspects of the units, allowing you to make an educated decision about your water heating needs.

What are the different types of tankless water heaters?

If you opt to go with an electric tankless water heater, make sure you thoroughly research the amperage, voltage, and circuit breaker requirements before making a purchase. The majority of the gadgets will operate between 110V and 277V; each model has its own set of specifications. As a result, be certain that the water heater you choose is compatible with your home’s electrical system. Inspect your electrical system to ensure that a circuit is available to accommodate the tankless water heater.


If, on the other hand, you opt to acquire a gas-fired water heater, there are a few factors to consider, such as the type of gas used in your home – propane or natural gas – and the amount of venting required. It is necessary to check the gas line to guarantee that it will meet the criteria of your fresh new gas-fueled tankless water heater.

How to choose a water heater with the right flow rate?

It is critical that you select a water heater whose flow rate is compatible with the flow rate of the faucets in your house. Each product has its own temperature and flow rate specifications. If the water does not heat up sufficiently, or if the flow rate is either too low or too high, the heater will not perform as intended. The demand for water in a shower may be 4 gallons per minute whereas the demand for water in a dishwasher might be just 1.5 gallons per minute while the temperature is at 100 degrees.

Also, it’s never a bad idea to address these issues with your plumber and get a second view just in case something goes wrong.

How do you go about the maintenance chore for a tankless water heater?

Maintaining your tankless water heater on a regular basis is essential if you want it to last as long as possible. In an ideal situation, you should schedule a maintenance appointment at least twice each year. A few pointers regarding how you may make sure your heater lasts season after season should also be available on the internet, if you look hard enough. Furthermore, most manufacturers give their customers with a repair/maintenance guarantee in the event that something should go wrong. And the majority of the time, they do!

What are the benefits of tankless water heaters?

A hot water system that is based on a basic tank can only supply as much hot water as the tank is capable of storing in its capacity.

And, because your heater is only as good as the size of your tank, you’ll be running out of hot water on a consistent basis. Because the tankless system warms water just when it is needed, you will always have hot water on demand, wherever you are and whenever you want it!

Reduced energy bill fees

Tankless water heaters are more expensive than typical tank water heaters, but they have the potential to save you money on your power costs. Tank heaters maintain a constant temperature of the water, even while you are not using it. The tankless technology, on the other hand, only warms the water when it is needed, allowing these small appliances to be more energy-efficient than traditional models.

Compact designs

While a traditional tank system takes up a large amount of space, a tankless system may be installed in a corner of your bathroom or even beneath your kitchen sink for maximum convenience. They are available in both wall-mounted and floor-mounted configurations. Therefore, they are really useful in this regard.

10 Best Electric Tankless Water Heaters of 2022 – Reviews & Top Picks

This is the place to go if you’re on the fence about whether or not to switch to an electric tankless water heater for your home, workshop, or workplace. An electric tankless water heater may save you money while also providing you with a number of additional advantages. There are a few things you should consider before replacing the tried-and-true water heater with something new. The following are reviews of ten different brands of electric tankless water heaters, which will assist you in learning about the many possibilities available.

Following the evaluations, we’ve included a brief buyer’s guide in which we examine the many elements and components that make up a tankless water heater to determine what is most significant.

A Quick Comparison of Our Favorites in 2022

In terms of overall performance, theStiebel Eltron Tempra 12 Plus Tankless Water Heateris our top selection for the finest electric tankless water heater. This type is simple to operate and is equipped with a digital screen. It is equipped with a continuous flow technology that limits water flow if the demand for hot water becomes excessive, eliminating the need to pause and let the water to warm up before using. Its compact size allows it to be used in practically any home, and it operates at such a low noise level that you will scarcely notice it running.

The only true drawback to the Stiebel Eltron Tempra 12 Plus Tankless Water Heater is that it can be expensive to install if your water supply is not close enough to the wiring for it to work properly.

  • Continuous flow
  • Small size
  • Simple operation
  • Silent operation
  • Digital display
  • And other features.

2.Titan SCR2 N-120 Electric Tankless Water Heater – Best Value

For the money, we think theTitan SCR2 N-120 Electric Tankless Water Heateris the best electric tankless water heater on the market. Providing the heater is located close to the electrical panel, this heater is a low-cost and simple to install option. Because it simply has two buttons to alter the water temperature, the controls are simple and straightforward to operate. Because it only turns on when it senses water flowing through it, it saves a significant amount of electricity.

The Titan SCR2 N-120 Electric Tankless Water Heater’s disadvantage is that it has a very sluggish flow rate, which means that it might take a long time to fill a bathtub with water. Temperature fluctuations occur during the opening few minutes of the game, as well. Pros

3.Sio Green SIO18 Electric Tankless Water Heater – Premium Choice

The Sio Green SIO18 Electric Tankless Water Heater is environmentally friendly. The Sio Green SIO18 Electric Tankless Water Heater is the tankless water heater of choice for many people. Despite the fact that this model is a little more expensive than the majority of the others, it is distinguished by a unique infrared heating mechanism that eliminates the need for coils to heat water. Because the water does not flow over the coils, there is no corrosion caused by mineral deposits, and there is no need to flush out the system or change the coils, making the unit completely maintenance-free and long-lasting.

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When compared to coil heaters, the one true disadvantage of the Sio Green SIO18 Electric Tankless Water Heater is that it does not create hot water as rapidly as they do.

Another minor issue is that the connections are designed for the United Kingdom, and while they will work with US fixtures, you may notice some leaking and may need to add more rubber washers.

  • Heating via infrared radiation
  • There is no coil to corrode or repair. Display using digital technology
  • Simple to install

4.Ecosmart ECO 18 Electric Tankless Water Heater

TheEcosmart ECO 18 Electric Tankless Water Heater is a compact, long-lasting machine that is simple to set up and maintain. It’s also simple to operate, with a single knob for controlling the temperature. Self-modulating technology automatically regulates the unit’s output, ensuring that you only utilize the power that you require. There are three heating components in the water heater, but you don’t necessarily need all three to get the water to boil. The additional heating elements of the Ecosmart ECO 18 Electric Tankless Water Heater are a convenient feature that allows you to heat up a large amount of water fast and efficiently.

Because each heating element has its own location in the electrical box, it may consume a significant amount of electricity when all three coils are in operation.

  • Durable
  • Simple to use
  • Self-modulating technology
  • Simple to install
  • And cost effective.
  • Heating elements corrode and burn out in a short period of time. It is necessary to have a lot of power

5.ECOTOUCH Electric Tankless Water Heater

TheECOTOUCH Electric Tankless Water Heater is a small appliance that can swiftly heat water to temperatures of up to 116 degrees. It is ideal for small spaces. It automatically changes its power consumption in response to the flow rate, allowing it to save energy even when it is in use. The digital display and touch control panel are simple to read and operate, and it comes with a remote control so you don’t have to be in the same room as the computer. The ECOTOUCH Electric Tankless Water Heater has a few drawbacks, the most significant of which is that it is not strong enough for showers or baths and is only suitable for sinks.

Even though it states this clearly on the box, we believe it is excessively expensive for a sink heater to have a professional install it, which we believe is unnecessary. Pros

  • Heats water to 116 degrees
  • Power is adjusted in accordance with the flow rate
  • Remote control
  • Digital display with touch control panel
  • Digital display
  • Only suitable for sinks
  • Expert installation is required.

6.Bosch US3 Tronic 3000 Electric Tankless Water Heater

Designed for small spaces, the Bosch US3 Tronic 3000 Electric Tankless Water Heaterprovides 3.4kW of heating capacity to swiftly heat water to the desired temperature. In addition to being a small and simple machine that can be put either vertically or horizontally, it is also quite versatile. There are no controls to change the brightness. It’s as simple as installing it and using it. While the absence of controls undoubtedly makes the Bosch US3 Tronic 3000 Electric Tankless Water Heater simple to operate, we would want to have as least a minimal level of control over the temperature of the water being heated.

It is only suitable for a single sink and maybe a washer; it is not suitable for showers, baths, or numerous sinks since it does not provide enough hot water for these applications.


  • 4kW power
  • Simple installation
  • Compact dimension
  • May be mounted vertically or horizontally
  • When it stops working at random
  • There are no controls. a reset button that is inconvenient
  • Showers are insufficiently large.

7.Rheem RTEX-13 Residential Tankless Water Heater

Rheem RTEX-13 Residential Tankless Water Heater is simple to install and includes with all of the necessary adapters and compression water connections, so you won’t have to spend any further money on other accessories after installation. Two heating elements work together to swiftly heat your water, and the temperature can be controlled using a rotating thermostat on the side. The digital display is crisp and simple to see even when viewing it from a considerable distance. However, the most significant disadvantage of the Rheem RTEX-13 Residential Tankless Water Heater is that it is not particularly durable; ours failed to function properly after only a few weeks of use.

We discovered that if we tried to use it while showering, it would instantly trip the circuit breaker.

  • Dial-type thermostat with digital display and dual heating components
  • Simple to set up.
  • Not long-lasting
  • Showers are not recommended. The circuit breaker is tripped.

8.Eemax EEM24013 Electric Tankless Water Heater

A self-modulating heater, theEemax EEM24013 Electric Tankless Water Heater dynamically changes the amount of electricity it consumes based on the amount of water that is going through the system. It’s a pretty little device, and finding a spot to put it is not difficult. It includes a sturdy stainless steel shell, and the rotating temperature control makes it simple to set the water temperature to the exact degree you want. Unfortunately, we had a number of issues with the Eemax EEM24013 Electric Tankless Water Heater, the most serious of which being a series of leakage connections.

A shower will not be possible with this unit since it does not create enough hot water. It is only appropriate for sinks. Our control module failed after around two months, and while it is changeable, the process was time-consuming and irritating. Pros

  • Self-modulating
  • Compact in size
  • Rotary temperature control
  • Stainless steel structure
  • Fittings that are leaking
  • Only suitable for sinks
  • The control module goes out of commission.

9.Marey Power Pak Plus Tankless Electric Water Heater

TheMarey Power Pak Plus Tankless Electric Water Heater is a very small device that can be tucked away beneath the majority of kitchen sinks. It only turns on when it detects water moving through the system, and you can control how much electricity it consumes when it does turn on by turning a rotary dial on the side of the unit. It has four different power settings, making it simple to achieve the ideal water temperature. In addition, you can choose how much water must run through the system before the heating element is activated, and the entrance hose features a filter to catch any entering silt before it is heated.

Due to the fact that it does not produce enough hot water to be used in the shower or the washing, it is best used in the kitchen.

  • Power consumption may be adjusted
  • The device is simple to operate. a little footprint
  • On the input, there is a filter.

10.Camplux TE27 Electric Tankless Water Heater

Despite the fact that theCamplux TE27 Electric Tankless Water Heater is the final model on our list of electric tankless water heaters, it still has a few noteworthy characteristics to offer. This type activates very rapidly when it senses water flowing through the unit, which helps to reduce the amount of time you have to wait before getting hot water. It has the ability to heat water to 125 degrees, and thanks to its bright LED display, you can immediately see when it is operating and what temperature it has been set to.

The device also keeps track of your ideal temperature and strives to keep it constant.

Unfortunately, the Camplux TE27 Electric Tankless Water Heater is a fairly pricey model, and there are numerous more affordable options on our list that are comparable in performance.


  • Remote control
  • Touch control
  • Can heat water to a temperature of 125°F
  • Instantaneous activation
  • Multi-angle installation
  • Remembers your preferred temperature setting
  • Display using LEDs
  • It’s expensive, and it doesn’t provide a lot of hot water. It is necessary to have a lot of power

Buyer’s Guide

Let’s take a look at some of the most critical characteristics to look for when selecting your next tankless water heater.


When it comes to buying a water heater, the first thing most people consider is the size of the unit, which refers to the amount of water it can heat. On this page, you will find heaters that operate in a single-point mode, which means they will only heat water in a single area. These units are suitable for use in an office or a workshop, but they are of limited utility in a family with more than one bathroom, a washing machine, and a number of individuals who take showers on a daily basis. A whole-house water heater will be required if you want huge volumes of hot water.

Heating Method

Most electric tankless water heaters heat water by circulating it through copper electric coils, which is similar to the heating element of an electric blanket in that it is relatively inexpensive. The water becomes hot as it goes through the coils that have been heated by electricity. The greater the number of coils, the hotter the water may get and the greater the amount of water that can be heated. When it comes to heating the water, the second method that electric tankless water heaters use is infrared technology.

Even though these heaters are often much more costly than the copper coil kind, the coil does not corrode when exposed to hard minerals, and it may thus last far longer. These heaters, on the other hand, do not often function as well as their copper counterparts do.


Installation is a constant source of anxiety. The majority of the units on this list are really simple to set up and need only a small bit of work. A lot of individuals will hire a professional to assist them with this phase of the project, which will add a few dollars to the overall cost. Another factor to consider is the distance between the water heater and the location where the water is required to be heated. It will be more difficult for the system to maintain the temperature of the water as it flows through the pipes over a longer distance.

Advantages of an Electric Tankless Water Heater

Some of the advantages of using an electric tankless water heater are as follows:

  • Because just the water that is necessary is heated, there is a significant reduction in energy use. In contrast to a standard water heater, which may be rather substantial, the tiny design allows it to be placed practically anywhere, including beneath the sink. In contrast to a standard water heater, which holds a fixed amount of hot water and can run out, you get endless hot water since it is heated as required. As a result of never being stored in a tank, the water is always fresh. Tankless heaters feature more replaceable parts than a typical heater
  • Thus, they are more reliable.


In our tests, the Stiebel Eltron Tempra 12 Plus Tankless Water Heater consistently supplied the hottest water to the most spots in our home, earning it the title of best tankless water heater. The continuous flow technology, which automatically slows down the water if it is being drained too quickly, ensures that you never run out of hot water. Titan SCR2 N-120 Electric Tankless Water Heateris a good alternative if you’re on a tighter budget and don’t mind waiting for the tub to fill. It’s also our pick for the finest tankless water heater for the money.

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