Whole House Electric Tankless Water Heater Reviews
For our list, we picked and reviewed the models that got the best feedback from our experts, our readers, and verified owners. We also tried to pick the best brands that our professionals have worked with.
These all are trusted brands and tested models, but before buying one, you need to make sure that its the correct size for your needs. For more information, refer to the sizing section or read through our complete guide on how big of a tankless water heater you would need for your needs.
Here is our ultimate list of the best whole house electric tankless water heaters to buy:
Tankless Water Heater Installation In Houston: Whole House Vs Point Of Use
As youre shopping for a new water heater, you might be thinking about a lot of different things. For example, electric or gas powered water heaters, which brand is the best, warranties, and so much more. Another thing to consider is whether you want a whole house water heating system or point of use water heaters.
Both of these types of water heating systems use the same basic idea. Essentially what happens is when you turn on the hot water tap for a fixture or appliance, cold water surges into the unit, which heats the water with heating elements. Then, the hot water travels through the pipe to the fixture, like a faucet or shower head.
Tankless water heaters of any type tend to be much more energy efficient than tank-style water heaters. This is because theyre only active when you want them to be. By contrast, traditional water heaters heat a tank of water over and over throughout the day, whether you need it or not.
Though these two types of tankless water heaters are similar, there are some distinct differences.
Camplux Te27 Electric Tankless Water Heater
Camplux is known for making outdoor-oriented portable appliances, such as griddles, stoves, firepits, and battery-powered water heaters. However, they recently started manufacturing residential water heaters and the TE27 electric tankless water heater is one of their best.
This fast electric tankless water heater has certifications from NFS and ETL as well as safety against overheating. When the temperature is too high, the water heater will automatically shut off to prevent scalding injuries.
The Camplux TE27 has a maximum flow rate of 6.5 GPM at 77°F, a touchpad-controlled digital thermostat with an LCD display, and a smart remote controller. The unit can be mounted at any angle, and it has a pressure relief valve that drains the water during cold weather to avoid freezing the heaters components.
However, despite all the glowing attributes, this electric tankless water heater has a slew of problems.
Users have complained about the TE27s poor reliability. For instance, the water temperature doesnt stick to the specified limit, instead regularly fluctuating from cold to warm but never hot.
This unit also requires a lot of water pressure to activate. This means that you have to turn the faucet on full blast if you need hot water, which wastes a lot of water. There have been reports of circuit breakers tripping, lights dimming, and electric appliances failing when this water heater activates.
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Pros And Cons Of Whole House Tankless Water Heater Installation In Houston
Whole house tankless water heaters are a great option to help you save on energy costs. These provide on-demand hot water to all the fixtures in your home. Also, unlike a tank-style water heater, theres no running out of hot water. Instead, you can get a steady flow of hot water as you need it.
There are a couple of drawbacks to this type of water heater. First, it might not be able to keep up with simultaneous needs. Now, some units certainly can supply hot water to a faucet and a dishwasher, for example. However, if you want to be able to use two showers, run a load of laundry, and use the kitchen sink with hot water, a single tankless water heater may not supply enough hot water for all of that at the same time. In these cases, you might have to install multiple water heaters connected together.
In addition, just like with a tank-style water heater, youre probably going to have to wait for hot water. The hot water has to travel through the pipes to your fixture, so cold water will come out first. The farther away the fixture is, the longer youll have to wait. Though, keep in mind its typically only a couple of minutes.
However, tankless water heater installation in Houston for a whole house unit is typically less expensive. This is because you only buy one unit and installation is typically much quicker. Also, its almost always the more effective and budget-friendly option for large homes or families who need a lot of hot water in a day.
Stiebel Eltron Tempra 36 Plus 9/10

Tempra electric tankless water heaters from the reputable German manufacturer Stiebel Eltron are compact but strong enough to provide hot water to multiple fixtures and locations in any season or environment. The Tempra 36 Plus is their most advanced model and also the best electric tankless water heater Ive reviewed to date.
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Pros And Cons Of Point Of Use Tankless Water Heater Installation In Houston
POU water heaters are becoming more and more popular as people are searching for both convenience and energy efficiency. They allow for fast hot water while saving energy. Individual POU units are also typically less expensive than whole house options because theyre smaller and provide less hot water output.
There are a few ways to use POU tankless water heaters. One way is to use them to supplement an existing whole house water heater. For instance, if you have a centralized water heater thats still in good condition, but cant keep up with the demands from a certain fixture or appliance, you might install a POU water heater. This can help provide hot water in that area and ease the burden on your whole house water heater.
Houston water heater installation for multiple point of use units does tend to take a little longer, because it involves installing them at each fixture. In some houses, this can be quite the project.
Also, costs for installing electrical lines next to each of your faucets and appliances could be quite costly depending on how large your home is. For instance, if you have several bathrooms, thats a lot of electrical work! Not to mention the costs for multiple POU units and installing them. For new construction, this might be a little easier because you can explain the need to the electrician subcontractor before your home is finished.
Stiebel Eltron Tempra 24 Plus
- Max. Flow Rate: 4.5 GPM
- Activation Flow Rate: 0.5 GPM
- Dimensions: 4.63 x 16.63 x 14.5 inches
- Service Requirements: 100 amps
- 99.8 Energy efficient
The next one on our list is Stiebel Eltron Tempra 24 Plus. This is a German brand that is well known for its advanced technology.
Stiebel Eltron Tempra 24 Plus is a whole-house electric tankless water heater. It is best suitable for homes with two bathrooms.
One special thing about this whole house electric tankless water heater is its Advanced Flow Control technology. It makes sure that when the hot water demand is higher than the unit can typically handle, it prevents the shower or the appliances from getting cold water by reducing the pressure and keeping the water hot.
It means that you may get less hot water, but it wouldnt be colder as it sometimes happens with other tankless water heaters.
Now, lets get to the technicals.
Its a bit less powerful than the Ecosmart ECO 27. According to the technical specifications of the unit, its able to provide 1.5 to 4.5 GPM of hot water depending on the temperature rise. Thats enough to supply two showers running at the same time without pressure drops or temperature fluctuations.
But you can also pick a more powerful Stiebel Eltron Tempra 29 kW or even 36 kW unit if this one doesnt fit your requirements.
Owners report that the unit is extremely quiet. Silent, in fact.
It also saves you a huge amount of space compared to traditional storage water heaters.
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Whole House Water Heaters
Whole house tankless water heaters, also known as centralized water heaters, are exactly like they sound. They supply hot water to your entire house. Usually theyre located in an out-of-the-way area, like a laundry room or garage. The hot water lines run to every fixture or appliance where you would need hot water. For example, your shower, faucets, washing machine, and dishwasher. This is the most common type of tankless water heater installation in Houston, as most homes are already set up for a centralized water heater that supplies all your fixtures and appliances.
Whole house water heaters can be either electric or gas powered. Gas tankless water heaters tend to be more expensive up front, but offer lower operating costs on average. They also tend to be a little larger than electric options, though theyre still quite compact. Electric options tend to be more efficient, but because electricity costs more than natural gas in most areas, it can be more expensive in the long-run than a gas option.
Electric Tankless Water Heater Installation
The average DIYer might say that installing an electric tankless water heater is simple. However, if you dont know what youre doing you should definitely not try to do this yourself just to save a few bucks. Its simply too dangerous and not worth the risk.
As a matter of fact, with some manufacturers their water heaters must be installed by licensed contractors or else the warranty voids.
Another thing to bear in mind is that not every home is suited for a POE unit, simply because the amp draw would be too high. This could mean that your old electrical service panel needs bigger wires and bigger breakers, or you need to run a completely new one entailing a couple of thousand dollars worth of electrical work.
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Easy To Size For Every Home
Hot water needs vary from home to home. Stiebel Eltrons full line of Tempra® tankless water heaters offers a variety of choices to meet all requirements.
The correct size Tempra® largely depends on the temperature of the ground water and the number of bathrooms in a house. Its easy to determine which Tempra® model best satisfies a households needs. Click the map for the complete Sizing Guide.
If there are high flow showers, or another out-of-the-ordinary situation, please call or email for advice. Stiebel Eltron service representatives provide assistance and make recommendations on sizing, or any other matter concerning our water heaters, to both homeowners and professional installers.
Unlimited Supply Of Hot Water
A Stiebel Eltron Tempra® responds directly to your demand for hot water without interruption. Showers will always be hot, even if there are several taken in a row and they run long. A tank water heater may be able to deliver more water all at once, but once the tank starts to deplete things get cold and pretty quickly come to a standstill while waiting for the tank to recover.
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Pro: Lower Risk Of Burns And Exposure To Toxic Metals
Many experts argue that tankless water heaters are safer than tank-style heaters.
Besides the fact that they dont have a tank that could explode, they also provide more precise control over the temperature so youre less likely to be burned by hot water.
Also, as I mentioned earlier, tank-style heaters break down over time due to hard water causing the inner lining of the tank to rust and corrode.
Those minerals and particles eventually make their way into your water lines and expose your family to harmful toxins.
Since tankless water heaters dont maintain a supply of water in a corroding tank, the water they distribute throughout your home is more pure and safer on your skin.
What Size Tankless Water Heater Do I Need

Heres how the pros make sure your heater delivers enough hot water.
It takes a big burst of BTUs for a tankless heater to turn cold water into hot water in just a few seconds. But if a heaters Btu output cant keep up with demand, it will cut back the flow, or, worse case, deliver lukewarm water.
To determine whether a heater will be able to meet a households needs, a plumber looks at three factors:
- The temperature of the water coming into the heater
- The peak demand for hot water in gallons per minute
- The heaters efficiency, as indicated by its Uniform Energy Factor, found in the product specs.
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Are Electric Tankless Water Heaters Worth It
An electric tankless water heater is worth it if you need to save on space and live in a cold climate. Electric tankless water heaters tend to be smaller in size and those who live in winter regions.
These water heaters may cost a lot upfront, but theyll definitely save you money over the long haul.
Rinnai Ruc98in Ultra Series
It is Rinnais newest line of electric tankless water heaters that are said to be twice as great as other models in this price range.
You can run the RUC98 into several water-based appliances in your homes at the same time without worrying about the interruption.
This model by Rinnai is one of the gas-powered tankless water heater systems and comes with digital controls located at the front panel and self-modulating technology.
The digital controls allow you to adjust the gas and the temperatures and also houses the power button.
It also has lock features allowing you to lock the desired temperature settings preventing other people in the house from making their adjustments.
It also comes with a great 12-year warranty.
While not number one on this list of the best electric tankless water heater reviews, you wont be disappointed.
Pros & Benefits:
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Choose A Payment Method For The Product
There are many ways for the buyer to pay the amount he has to pay the seller. The first is to pay directly to the shipper right after receiving the goods this is called “money handing over porridge,” you are completely assured with this payment method.
Secondly, card payment, according to research in 2017, 2018, and 2021, card payment is increasingly used by more people because of its safety, speed, and convenience, but this method requires buyers to pay first and then receive the goods so as to prevent risks when transferring money, you should keep the invoice.
It can be seen that self-ordering through websites has many potential risks and problems such as It is easy to encounter websites with a poor reputation, sites that impersonate large websites. There is no experience in choosing best whole house electric tankless water heater, reputable sellers.
Unnecessary costs arise. You must also have a certain language ability to read product names, policies, promotions. Requires the use of an international payment method. Provide quite a lot of papers. Many websites in foreign countries do not ship to Vietnam.
And many other problems arise. Because of these difficulties, many customers are discouraged when buying at international websites. In some cases, despite having anticipated the difficulties and having experience, risks can still occur.
Pro: Lower Risk Of Leaks And Water Damage
One of the biggest risks with tank-style heaters is, over time, minerals from hard water build-up within the tank which leads to corrosion and eventually leaks.
Since tankless water heaters dont have a tank, there is no risk of leaks or flooding.
This doesnt mean that tankless water heaters are immune to issues. They can and will run into problems that could result in leaking, but the chances of having a major leak that floods your entire basement and causes significant damage are slim.
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Benefits Of Tankless Water Heaters
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Continuous Hot Water
Tankless water heaters deliver continuous hot water. If sized properly, youll never run out of hot water again.
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Energy Savings
A. O. Smith tankless water heaters heat your water only when youre using it, reducing energy costs depending on your hot water usage.
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Space Savings
Due to their significantly smaller size, tankless water heaters save a tremendous amount of space compared to a traditional water heater and can be mounted in various spaces around your home.
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On-Demand Hot Water
The heating technology within A. O. Smith tankless water heaters provides on-demand hot water by heating the water when you need it.
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Instant Hot Water
A. O. Smith tankless water heaters with built-in recirculation pumps offer instant hot water when installed with the proper piping.
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Innovation & Reliability
A. O. Smith has a long, rich history of reliability and innovations that have led the water heating industry for decades.