I Tested And Reviewed 8 Best Electric On Demand Water Heater (2023)

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.

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.

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.

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.

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.

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.

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.

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.