Looking for the best electric on-demand water heater? With so many options on the market, it can be tricky to know where to start. An on-demand or tankless water heater heats water directly as needed, rather than maintaining a tank of hot water like a storage water heater. This means you never run out of hot water, and only heat water when you need it, which can help save on energy costs. As you shop around, here are some key factors to consider:
What is your typical hot water usage? Think about how many sinks, showers, appliances, etc. you use hot water for and when. This will determine the right size/flow rate and power output for your electric on-demand unit. Also consider your climate – if you live in a colder area, you may need a higher powered heater.
What is your available space? Tankless water heaters are fairly compact, but you still need to account for proper installation clearances. Measure where you plan to install it. Also consider your electrical panel – you likely need a 240V hookup which requires sufficient amperage.
How important is efficiency? Look for heaters that are Energy Star certified or have high energy factors. Electric heaters tend to be fairly efficient, but energy factors can range. The more efficient, the more you'll save long term on electric bills.
Do you want WiFi/smart controls? Many on-demand heaters now come with handy apps, voice controls, and scheduling options. This provides added convenience and customization.
By carefully weighing features, efficiency, size and your household's hot water needs, you can zero in on the perfect electric tankless model. Contact a professional to ensure proper installation and maintenance. With the right electric on-demand water heater, you'll enjoy endless hot water and potential energy savings for years to come.
8 Best Electric On Demand Water Heater
|#||Product Image||Product Name||Product Notes||Check Price|
The product is ideal for homeowners or small households in need of a compact and energy-efficient water heating solution for a single shower.
The product is ideal for providing on-demand hot water for a whole house shower.
The product is ideal for providing an instant and efficient hot water supply for sinks.
The product is ideal for providing hot water on demand in specific locations, without the need for a plug.
The product is ideal for providing instant hot water on demand and has a digital display for easy control.
The product is ideal for providing instant and energy-efficient hot water on demand in homes or commercial spaces.
The product is ideal for providing instant and efficient hot water at the point of use.
The product is ideal for providing endless hot water for residential whole house showers with easy installation.
1. Airthereal Electric Tankless Water Heater: Endless Hot Water
I recently had the opportunity to try out the 18k Evening Tide tankless water heater in my home, and I must say that I am extremely satisfied with the product and the company behind it. As a handyman by trade, I found the installation process to be fairly straightforward after reading the owner's manual. However, it did take a few hours to complete the necessary wiring and plumbing, as I was relocating my hot water heater from the basement to the main floor.
Unfortunately, I encountered an issue with the unit initially, which I later realized was due to a faulty product right out of the box. I had purchased it on Cyber Monday, and I suspect that it might have been damaged during shipping. The unit worked for only two weeks before it stopped functioning. Being new to tankless water heaters, I was unsure of what was wrong initially. I was disappointed to learn that the customer service line for the company was only open from 12-4 EST, but I discovered that I could email them at any time and they would respond outside of those hours. Understanding that it is a smaller company, I appreciated their willingness to assist me. They requested a couple of short videos and other information, and within a week, I received a replacement unit.
Swapping out the units was a breeze, taking me only about 30 minutes, including turning the breakers off and on in the basement. I could have easily guided my 10-year-old through the process. As soon as I started using the replacement unit, I could tell that it was a good one, unlike the original. I appreciated that it went into standby mode when hot water was not running, which makes perfect sense for energy efficiency. It is important to note that if you see an EF code when the water isn't running, it does not indicate energy efficiency; it simply means there is no water flow.
To sum up my experience, I am highly satisfied with both the 18k Evening Tide tankless water heater and the company behind it. As someone who frequently engages in home remodeling projects, I am now considering installing these units in houses that require new water heaters. As a single mother of three girls who go through a considerable amount of hot water, this product has been a game-changer in our lives. We can now all shower one after another without worrying about running out of hot water. Additionally, the unit's compact design is aesthetically pleasing.
I wanted to provide an update on my experience three months after using the new unit, and I am thrilled to say that I am beyond pleased. I can simultaneously run a bath and a shower without any shortage of hot water. The only minor "flaw" I have discovered is that if you only run the hot water for a brief moment (a few seconds), the unit beeps because there is no water flow to cool the jets. However, this is not a flaw in the product but rather how it is designed to work. Simply allowing the hot water to run for at least 30 seconds resolves this issue. Overall, I am absolutely in love with my purchase and would highly recommend the 18k Evening Tide tankless water heater to others.
2. Electric Tankless Water Heater – Hot Showers Made Easy
I recently purchased a tankless water heater for my property in Northwestern Ontario, Canada, and I couldn't be happier with the results. This product has exceeded my expectations in terms of performance and satisfaction.
One of the standout features of this tankless water heater is its ability to provide hot water to any tap in the house within 3-5 seconds. It's truly remarkable how quickly it delivers hot water, and this convenience alone has made me never want to go back to a traditional tank heater.
The installation process was a breeze, and I was able to set it up easily without any complications. The water temperature feels great when I'm taking a shower, and I appreciate the consistent and reliable performance it offers.
I initially purchased this tankless water heater for a remote bathroom with limited power options. The compact size of this unit compared to larger tank heaters was a significant factor in my decision. It not only saved space in the bathroom but also proved to be an excellent solution for the shower, sink, and washing machine. The space-saving aspect and on-demand hot water have made this tankless unit a perfect fit for my needs.
If you're considering installing a tankless water heater, I highly recommend seeking professional assistance for the electrical and plumbing connections. In my case, I had the heater installed during the construction of a new master bathroom and walk-in closet extension. The plumber assured me that this tankless unit could potentially heat the entire house, but I only needed it for the bathroom. Nonetheless, the installation was seamless, and it has been a game-changer for us. The 220v power requirement and water hookups were well worth it, especially in an older house like ours. No more waiting for water to heat up before indulging in a long, hot bath in our Jacuzzi tub.
3. Ecotouch 240v Electric Tankless Water Heater – Silver
I recently installed this unit in my sister's nail salon and I have to say, I'm impressed. The installation process was simple and straightforward. The unit comes with brackets that allow it to be easily mounted on the wall under the kitchen cabinet. The instructions mention the need for a ground wire, but since I didn't have one in my old building, I used a clamp to ground it to one of the water copper lines that goes into the ground.
In terms of performance, I'm quite satisfied. The kitchen sink, which is only about 10 feet away from the unit, gets hot water consistently. The pedicure bowl, which is around 20 feet away, also gets warm enough, although not as hot as the kitchen. It's worth noting that the temperature of the water depends on the flow rate, so if you don't run the water at full blast, it will get hotter. I ran the pedicure bowl for about a minute and the water was warm enough throughout.
The unit itself looks and feels great. It's compact and doesn't take up much space, which is perfect for my small nail salon. As for durability, only time will tell, but for now, it's working perfectly fine.
I live alone in a house and I decided to replace my huge gas bill and water heater with this tiny unit. My home has all rigid copper plumbing and it's a mild winter, so the unit is able to meet my needs as long as I keep the flow rate below 1 GPM. It does get hot in my upstairs shower, but that's because I have a very light water-saving showerhead and I regulate the flow at the showerhead. If you have a more traditional showerhead, you won't have any issues as long as you follow the application guide and understand your usage and needs.
This unit is not meant for large houses, but for my current purposes and research, it's fantastic. I have also installed Niagra 3 flow water savers on the lavatory and kitchen sink, and the results have been great. The low flow in the bathroom vanity is hot enough to burn your hand upstairs, while the medium flow is nice and warm. In the kitchen, the low flow takes a bit longer to heat up, but it still gets hot if you let it run. However, I don't need it to be that hot, so I don't waste water waiting for it to heat up.
4. Th?rmotank: Electric Point Of Use Water Heater
The small on-demand water heater is a perfect solution for low flow water setups, such as small off-grid cabins or workshops. It provides instant heat and is ideal for a faucet in a bathroom or workshop where there is running water. While it cannot be used for both the shower and sink simultaneously, it works perfectly when adjusted to the right water flow.
With a temperature set at 100 degrees, this tankless water heater is designed for low water flow applications and is not intended for high flow or high pressure setups. However, it performs exceptionally well in its intended use.
One of the standout features of this water heater is its compact size, making it easy to fit under the smallest sinks. The build quality is strong, and the LCD display is user-friendly and easy to navigate. It also comes with overheat protection and leak prevention safety protocols, providing peace of mind.
It's worth noting that this unit is not a whole-house unit and should be used as a point-of-use water heater. It can be connected to the hot water line coming from the main water heater, allowing for instant warm water as soon as the faucet is opened. This dual operation mode, although not mentioned in the unit manual, is supported by the manufacturer.
However, it's important to consider the power requirements of this water heater. It requires a 110 VAC / 40 Amp power supply, which means it needs a dedicated 40 Amp circuit and separate wiring. This may involve hiring a licensed electrician, unless you have the necessary skills to do it yourself. It's crucial to ensure that you budget for this additional cost when deciding to install it in your home.
5. Black Camplux Instant Water Heater – 6kw, 240v
This hot water on demand system is incredibly easy to install, making it suitable even for those with minimal experience. It is particularly ideal for use in RVs, as it effectively boosts the water heater's performance during winter months when hot water can be more challenging to maintain. With the ability to heat incoming water to 120° and then route it into the water heater to reach 140°, this system ensures a constant supply of hot water, even allowing for a 30-minute hot shower in the winter. Gone are the days of waiting for the water tank to recover, as this system provides an ample and continuous supply of hot water. The installation process may require some minor adjustments due to its 120-volt, 40-amp power requirements, but the end result is well worth it. Once installed, this system brings your RV into the 21st century, eliminating the inconvenience of traditional water heating methods. Additionally, this product is versatile and fits well in any space. It efficiently heats the water to the desired temperature and is incredibly easy to install. Overall, this is a highly recommended product, receiving a perfect 5-star rating.
6. Stiebel Eltron Tempra 29 Plus Tankless Water Heater
We recently upgraded our 38-gallon tank water heater to this tankless water heater, and it has been one of the best appliance purchases we've made. With a family of six and a two-bathroom house, we struggled for years with limited hot water. But now, we can finally fill up the bath and have everyone take a shower within an hour without having to wait for the tank to reheat. The installation process was fairly easy, and we even had an electrician expand our electrical panel to accommodate the three separate 220-volt 40-amp circuits required for this unit.
The quality of this water heater is impressive, and we have had no issues with it so far. We live in south Texas, so getting the water hot enough is never a concern. We typically set it at 120 degrees, and the inlet temperature never drops below 60 degrees. It's a relief not having to worry about running out of hot water while doing dishes or during someone's shower.
After using this tankless water heater for a year, we have noticed significant savings on our energy bills. In fact, we calculated a savings of $153. It's also worth mentioning that this appliance makes it easier to use more hot water without running out. We still appreciate this upgrade to our home on a weekly basis, and we continue to descale it with vinegar once a year.
The replacement process for our old water heater was fairly straightforward, especially for someone with DIY skills. The unit is lightweight and easy to install on the wall. However, we did encounter some challenges with the mounting holes not aligning with the standard stud layout in the USA. We had to use a combination of wood screws into studs and drywall anchors to securely mount it.
The plumbing aspect of the installation was simple, and we replaced the flex lines with PEX and insulated the hot side for added efficiency. As for the electrical work, we recommend consulting a professional electrician if you're not comfortable with it. This unit requires three separate 220-volt 40-amp circuits, which may require additional space in your breaker box or the installation of a sub-panel. We hired an electrician to handle the wiring, which cost us $1200, but it was worth the peace of mind.
In terms of usage, we initially set the temperature at 119 degrees, but found that we had to run the shower with only the hot side to get a warm but not super hot water. We gradually increased the temperature to 125 degrees and eventually settled on the maximum setting for a perfect shower temperature, which required mixing hot and cold water. It's important to note that since this is an on-demand hot water heater, it may take a minute or so for the hot water to reach your tap if it hasn't been used recently or first thing in the morning. However, once it's running, the hot water seems to last forever, and we haven't experienced any cold water issues.
7. Ecotouch 9kw Tankless Electric Water Heater
I recently installed this tankless, on-demand water heater under my kitchen sink and it has been a game-changer. Previously, I had to wait for a significant amount of cold water to be wasted before hot water would come out of the faucet due to the route of the hot water pipe. But now, I have instant hot water in seconds, which is fantastic.
The installation process required an electrician to wire up a 40-amp, 240-volt service to the unit and a plumber to connect it to the pipe with the dishwasher and faucet. While the cost of the heater unit itself was relatively small, the investment in the installation was worth it. The heater unit is compact, easy to mount on the side of the cabinet, and doesn't take up much space.
One feature that I absolutely love is the ability to adjust the water temperature by simply touching the front of the unit. There are no mechanical switches or adjustments, making it incredibly convenient. I have set the temperature to 118 degrees, as 120 felt a bit too hot for my liking.
The plumber also pointed out that the inlet has a screen to catch debris in the pipe. He advised me that if the flow slows down, I can shut off the water to the unit, unscrew the cold water line, and rinse the filter screen. This maintenance tip has been helpful in ensuring the unit continues to function efficiently.
The only minor annoyance I have encountered is that the unit needs to be turned on again after a power outage. However, after being installed for about 48 hours, the on-board battery is charged and the unit remembers the temperature settings, so it's not a major issue.
I am currently using this unit for my master bathroom, and it exceeds my needs for a nice hot shower. It can handle temperatures up to 120 degrees, but I have it set to 102 as I prefer a slightly cooler shower. With our ground water supply at 76 degrees, this unit can easily provide a 44-degree temperature lift at a flow rate of 2.5 gallons per minute. The digital automatic temperature control allows me to set it to my desired temperature effortlessly.
In fact, I am so impressed with this water heater that I am planning to purchase a second, larger unit for the rest of my house. The price is affordable, and the daily usage is low, making it a straightforward solution for my hot water needs.
I initially bought this water heater in September 2020 to replace my old 30-gallon gas water heater. I wanted to utilize the space previously occupied by the larger unit to increase the size of my bathroom during a remodel. Since then, it has served as a temporary solution until I finalize my long-term requirements. My previous experience with a different brand was disappointing, as it required too much flow to stay active and had poor temperature regulation. That's when I came across this unit and decided to give it a try.
The way I use this water heater works perfectly for my needs. I typically set the temperature on the unit to 120 degrees, which is ideal for washing dishes using a 1.5 gallons per minute aerator on my faucet. It maintains this temperature consistently, except during the coldest Kansas winter days. In those instances, I simply turn down the flow rate, and the temperature quickly rises again. When taking a shower, I set the temperature to 98 degrees and use a 1.5 gallons per minute showerhead. The unit maintains the desired temperature throughout my entire 15-minute shower, even during the winter months.
I installed this unit myself, which required a 40-amp dedicated breaker and some plumbing work. It was definitely worth the effort and investment. In fact, I am now considering getting a smaller 120-volt unit to mount under my kitchen sink. This way, I can keep the main unit set at 98 degrees year-round and have the second unit preheat the water for the kitchen sink, which would be set at 120 degrees all the time.
I highly recommend using at least one water filter on your main water line, or even a water softener, to prolong the life of the unit. This applies to all types of water heaters and can help maintain their efficiency.
8. Thermomate 18kw Electric Tankless Water Heater, Endless Hot Water
I recently installed the new water heater and I am extremely impressed with its performance. It replaced my previous unit that unfortunately caught fire after just over a year of use. The new water heater, despite being smaller in size (11kw compared to the previous 18kw), outperforms its predecessor in every way.
One of the standout features of this water heater is its ability to maintain a consistent temperature without any fluctuations. It also heats up much faster, which is a great convenience. I live in a small farm house with well water and this water heater doesn't seem to be affected by any pressure loss or even cold water temperatures. It simply does its job efficiently and effectively.
The only minor issue I have with this water heater is the manufacturer's recommendation to use 12awg wire with 2 30 amp breakers. While this may not be a problem in areas without specific electrical codes, many inspectors would fail an installation using 12awg wire. To err on the side of caution, I personally chose to use 10awg wire instead, especially after my previous tankless heater caught fire due to a fault in the heating element. It's always better to be safe than sorry when dealing with electricity.
Setting up the water heater was a breeze, just like the other units I've installed. It is very easy to maintain and the quality of materials used is top-notch. The simple settings and digital display, which shows the current water temperature and heating status, are also great features. While the flush valves are not included, they can be easily ordered separately or found at big box stores.
In terms of energy usage, I decided to install an energy monitor on all 3 circuits to get an accurate reading. To my surprise, the water heater consumes very little energy. In 3 weeks, it only used about 55kwhs in total. We set our temperature at 120°F, which seems to be a comfortable and efficient setting.
Are electric on-demand water heaters more energy-efficient than traditional water heaters?
Yes, electric on-demand water heaters are generally more energy-efficient than traditional water heaters. Traditional water heaters store and heat a large tank of water continuously, which can result in standby heat loss.
On the other hand, electric on-demand water heaters, also known as tankless water heaters, only heat water when it is needed.
Tankless water heaters work by heating the water as it flows through the unit using electric heating elements. This means that they do not continuously consume energy to keep a large amount of water hot.
As a result, they can be more efficient and save energy, especially if you have low hot water usage or intermittent hot water needs.
However, it is important to note that the energy efficiency of electric on-demand water heaters can vary depending on factors such as the size of the unit, the quality of insulation, and the climate. It is advisable to choose a properly sized unit for your household's hot water demand and consider other factors such as installation costs and maintenance requirements before making a decision.
Are there any maintenance requirements for an electric on-demand water heater?
Yes, there are some maintenance requirements for an electric on-demand water heater. Although electric on-demand water heaters generally require less maintenance compared to traditional tank water heaters, it is still important to perform regular maintenance to ensure optimal performance and extend the lifespan of the unit.
One important maintenance task is to regularly clean the water filter or sediment trap located on the cold water inlet of the heater. This helps to prevent any debris or sediment from clogging the unit and affecting its efficiency.
It is recommended to clean the filter at least once every six months, or more frequently if you notice a decrease in water flow.
Additionally, it is essential to check the electrical connections and wiring of the water heater regularly to ensure they are secure and free from any damage. This helps to prevent any electrical issues or malfunctions.
If you are unsure about performing maintenance tasks on your electric on-demand water heater, it is always recommended to consult the manufacturer's guidelines or contact a professional plumber who can provide expert assistance.
Are there any specific electrical requirements for installing an electric on-demand water heater?
Yes, there are specific electrical requirements for installing an electric on-demand water heater. These requirements ensure the safe and efficient operation of the unit.
Firstly, you will need to ensure that your electrical system can handle the power requirements of the water heater. Electric on-demand water heaters typically require a dedicated circuit with the appropriate amperage rating.
It is recommended to consult with a licensed electrician to determine if your electrical system can support the water heater's power needs.
Additionally, the water heater will need to be connected to a properly grounded electrical outlet. It is important to follow the manufacturer's instructions for the correct wiring and grounding procedures to avoid any electrical hazards.
Furthermore, it is crucial to consider the location of the water heater in relation to the electrical panel. The distance between the two may affect the size of the wire needed for the installation.
To ensure compliance with local electrical codes and regulations, it is always advisable to consult with a qualified electrician before installing an electric on-demand water heater. They will be able to assess your specific situation and provide guidance on the necessary electrical requirements for a safe and successful installation.
Can an electric on-demand water heater be used in conjunction with solar panels?
Yes, an electric on-demand water heater can definitely be used in conjunction with solar panels. In fact, combining these two technologies can be a great way to maximize energy efficiency and reduce reliance on traditional energy sources.
Solar panels generate electricity from sunlight, which can be used to power various household appliances, including electric on-demand water heaters. By connecting the solar panels to the electric water heater, you can harness the renewable energy from the sun to heat the water, resulting in lower energy bills and a reduced carbon footprint.
To ensure compatibility, it's important to consider the power requirements of the electric water heater and the capacity of the solar panels. It may be necessary to install an inverter to convert the direct current (DC) power generated by the solar panels into alternating current (AC) power required by the water heater.
Consulting with a professional solar installer or an electrician experienced in solar installations would be advisable to determine the specific requirements and feasibility of integrating a solar panel system with an electric on-demand water heater.
Can an electric on-demand water heater provide hot water for an entire house?
Yes, an electric on-demand water heater can provide hot water for an entire house, but it depends on the specific requirements of the household. On-demand water heaters, also known as tankless water heaters, heat water as it passes through the unit, eliminating the need for a storage tank.
Electric on-demand water heaters are available in various sizes and capacities to cater to different household needs.
The capacity of the water heater should be carefully chosen to ensure it can meet the peak hot water demand of the house. Factors such as the number of bathrooms, appliances, and the usage patterns of hot water need to be considered.
It is recommended to consult with a professional plumber or an electrician to determine the appropriate size and capacity of the on-demand water heater based on the specific requirements of the house.
In some cases, multiple on-demand water heaters might be needed to provide hot water to different areas of the house simultaneously. Additionally, the electrical supply of the house should be able to handle the power requirements of the water heater(s).
How does an electric on-demand water heater work?
An electric on-demand water heater, also known as a tankless water heater, operates by heating water directly as it flows through the unit. Unlike traditional storage tank water heaters, which constantly heat and store a large volume of water, on-demand water heaters only heat water when there is a demand for it.
When a hot water tap is turned on, cold water enters the unit and is rapidly heated by electric heating elements or a gas burner, depending on the type of unit. The heated water then flows out of the unit and into the plumbing system, providing hot water instantaneously.
On-demand water heaters use sensors to detect the flow of water, triggering the heating elements to activate. Once the water flow stops, the heating elements shut off, conserving energy. This design eliminates the need for a storage tank, resulting in a more compact and energy-efficient system.
Electric on-demand water heaters provide a continuous supply of hot water, as long as the demand does not exceed the unit's flow rate. They are highly efficient and can save energy compared to traditional storage tank water heaters, as there is no standby heat loss from keeping a large volume of water hot at all times.
How long does it take for an electric on-demand water heater to heat water?
The time it takes for an electric on-demand water heater to heat water varies depending on the model and size of the unit, as well as the desired temperature rise. Generally, most electric on-demand water heaters can heat water within a few seconds to a few minutes.
These water heaters work by activating a heating element when hot water is requested, so there is no need for a storage tank. The cold water flows through the unit, and as it passes over the heating element, it rapidly heats up to the desired temperature.
The exact heating time will also depend on the flow rate of the water. If you are using a high-flow fixture or multiple fixtures simultaneously, it may take slightly longer to heat the water as the heater needs to work harder to maintain the desired temperature.
It is important to note that electric on-demand water heaters may have a slight delay in delivering hot water compared to traditional storage tank water heaters. However, once the system is up and running, it can provide a continuous supply of hot water without running out.
If you are considering installing an electric on-demand water heater, it is best to consult the manufacturer's specifications or consult a professional plumber to determine the specific heating time for the model you are interested in.
How much does it cost to install an electric on-demand water heater?
The cost of installing an electric on-demand water heater can vary depending on several factors. These factors include the size and capacity of the unit, the complexity of the installation, and the region you are in.
On average, the cost of a basic electric on-demand water heater installation can range from $800 to $1,500. However, it's important to note that this is just an estimate, and the actual cost can be higher or lower depending on your specific requirements and circumstances.
To get a more accurate estimate, it is recommended to consult with a professional plumber or an experienced contractor who can assess your specific needs and provide you with a more precise cost estimate.
They will consider factors such as the existing plumbing setup, electrical requirements, and any additional modifications that may be needed for the installation. This will ensure that you receive an accurate cost estimate based on your unique situation.
What are the advantages of using an electric on-demand water heater?
There are several advantages to using an electric on-demand water heater. Firstly, these units provide instant hot water whenever you need it, eliminating the need to wait for a storage tank to heat up.
This can be particularly beneficial for households with high hot water demands or those who require hot water on demand.
Secondly, electric on-demand water heaters are highly energy efficient. Unlike traditional storage tank heaters, they only heat water when it is needed, reducing energy consumption and ultimately saving you money on your utility bills.
Additionally, these units are compact and space-saving, as they do not require a large storage tank. This makes them suitable for smaller homes or apartments where space is limited.
Lastly, electric on-demand water heaters have a longer lifespan compared to traditional tank heaters. This is because there is no standing water in the unit, reducing the risk of corrosion and mineral buildup.
Overall, electric on-demand water heaters offer convenience, energy efficiency, space-saving design, and durability, making them a favorable choice for many households.
What is the lifespan of an electric on-demand water heater?
The lifespan of an electric on-demand water heater can vary depending on various factors such as the quality of the unit, usage patterns, maintenance, and water conditions. On average, a well-maintained electric on-demand water heater can last anywhere between 10 to 15 years.
However, it is important to note that this estimate can vary.
To maximize the lifespan of your electric on-demand water heater, regular maintenance is crucial. This includes flushing the system to remove sediment buildup, checking and replacing any faulty components, and ensuring proper insulation.
Additionally, factors such as the hardness of water can affect the longevity of the heater. If your water supply is particularly hard, it may lead to mineral deposits and scale buildup, which can impact the performance and lifespan of the unit.
Installing a water softener or using a water treatment system can help mitigate this issue.
Ultimately, following the manufacturer's guidelines and properly maintaining the electric on-demand water heater will help ensure its optimum lifespan.