You might think an under sink water heater cannot be taken seriously. What good can such a scaled down version of a central water heater system do, you might ask. But indeed, you could be talking about a lifesaver here.
It’s true an under sink water heater is compact. It may be too compact for your comfort. But that’s exactly the beauty of it all. You get instant heat when you need it most.
For why keep water heated all day inside a giant water tank if you need it only on particular instances? From a certain point of view, it certainly looks like an overkill. And it could be wasting your resources. Under sink water heater reviews agree.
Stored unused energy only means higher utility bills. Why? Simply because these storage tank water heaters need to head and reheat every now and then to give you the warm bath you need. That’s whether you’re using them or not.
By and large, a standard tank will consume more energy in the winter months. In cooler weather, they’ll have to work harder, driving your utility bill higher.
An under sink water heater won’t have that problem. Equipped with high-powered burners, the on-demand water heater will give you the hot water you need in matter of seconds.
On the other hand, standard tank-variety will take time to do it.
Then, there’s the case for space. That mighty tank is going to eat space. Not with the on-demand variety which is neatly tucked under your sink.
Under sink water heaters are a treasure trove. If you’ve been wandering how you can get the best of one, look no further. We’ve scoured the Earth for the best models of today and put them on display right here.
Even better, we’re showing you how each product offering should satisfy your needs. So you get to have the most bang for your buck. Read on.
Ariston GL4S Electric Mini-Tank Water Heater
More than anything else perhaps, under sink hot water heater reviews would heap praise to the Aniston GL4S. And we wouldn’t be surprised. At the price it’s at, and the features it put on the table, this one is heaven sent.
First up, you got a 4-gallon point-of-use water heater here. That means you won’t be running out of hot water soon. And we’re talking about instant service for you. Unlike a kettle which takes so much time getting you the hot water, here it’s just a matter of seconds. Every time.
But the best part of this 120-volt wonder worker is this isn’t hard to install. It’s almost like the plug-and-play Xbox 360. If you’re serious about getting on-demand water heater, this could be a treasure find!
EcoSmart POU 6 Point of Use Electric Tankless Water Heater
We’re telling you, under sink hot water heater reviews simply can’t ignore this EcoSmart POU. You got here a powerhouse – however small it is. Yes, you’re going to get great savings in space with this on. Most importantly, you won’t run out of hot water anytime soon. No, sir!
To think you’ll save as much as 12 cubic feet in your storage area. That’s the beauty of an under sink water heater. You can put it out of the way. But it’s as functional as you want it to be.
Your water savings could climb as high as 50%. How’s that for a change?
Bosch ES4 Point of Use Mini Tank Water Heater
This 120-VAC water heater may consume 1440 watts but it’s all worth it. Given that you get the hot water you need right when you need it most. What’s more, you won’t have a problem installing this one as it can be wall or floor mounted.
Gone are the days when you have to go to work without ever taking hot coffee. Now, you can get the hot water almost instantaneously. Just lay this in just within the sink vicinity into the water line and voila. Plus, with the Bosch 3000T you get three sizes to choose from to fit your needs. The way you want it.
Atmor 3kw/110v Single Sink Tankless Water Heater
Well, this isn’t the strongest of the bunch. This Atmor product offering gives you a measly 0.5 GPM and would certainly be unable to service more than one user. Not really one you can boast about to everyone. Still, this is a winner.
Why? Easily, this is the cheapest of the bunch. So if your needs is not that pronounced, this one should fit to a T. More than the others in this A-list.
BOSCH ES2.5 Point of Use Electric Water Heater
This electric water heater boasts of the Bosch Tronic (3000T). And should service your ‘hot water’ needs as efficiently as most in this list. What’s more you’re getting a CSA/UL certified product here that along with its 6.8 GPH should give you all the hot water you need. So long as you’re the only one needing it as one time.
Detailed Comparison List
POU 6 Point
of Use Electric
Point of Use
Point of Use
3.5 Point of
Oh, you might be thinking this is just like any water heater you’ve come across, but it isn’t. This particular product right here is an improved version of Ariston GL4. And as you know, the latter is always greater than the former. That’s why Ariston GL4S functions about 3 times better than the original model.
This model from Ariston brand is spot on.
One distinguishing difference is its temperature control. The water released from this unit can vary in temperature depending on how you set it. Its temperature ranges from 65 deg F-145 deg F.
This way you get to use a very high temperature when the water is freezing cold and an average temperature when the water is just cold.
Similarly this mini-tank won’t take up space. Its compact size gives it a chance to fit in well into any part of your home. Most especially under the sink. That’s if you don't want to place it on the floor or on the wall.
Do you know what else is so good about this water heater? It’s instant heating ability. Sometimes it can be very annoying to wait for minutes just to wash your hand with warm water. So the best option is to have a water heater that would heat up the water within seconds. And at the same time deliver it within seconds.
Way to go!
Ariston GL4S is one of the best under sink water heaters you could ever use.
That’s why you would find this on all under sink hot water reviews.
Although you might not appreciate the fact that it's a bit heavy compared to other under sink water heaters.
Looking for a water heater that has a modern day look? Well, you might have just found one here. EcoSmart POU 6 electric tankless water heater looks amazing. It takes just a look at this to know it’s top notch quality. Even though you might be placing this unit under the sink you would appreciate it’s beauty even in that enclosed area.
Perhaps this is why all customers are raving about this product among other under sink water heaters.
These days getting water heaters that are very affordable is like going a goose chase. It’s really hard to find. But when you do find affordable water heaters, you spend more on the installation process. Because expert skills are needed to have this setup.
Good news! It’s totally differnt with this model from EcoSmart brand.
For water heating costs you get to save up to 60% with this unit. This product from EcoSmart brand is really smart in helping you reduce how much you spend on water heating. Well 60% is definitely a whole lot.
And as for its installation process, you won’t need an expert. As long as you can hold the tools you are good to go. Although it might take a while for you to install this piece, it’s way better than getting a professional to fix this. That would automatically mean extra money from your pocket.
This simply one of the best under sink water heaters. And with one in your home you may never go wrong.
Although it’s one of the best it has its own flaws. One of which is that it consumes a bit more electricity than other under sink water heaters.
A quick glance at this product is all you need, to know it isn’t like any other you’ve come across. This high quality product has been able to satisfy customers over time. Bosch ES4 is one of the best under sink water heaters you can ever use. It has a glass lined-tank that makes it last for a long time.
This might be all you need if you don’t want to keep changing your water heater every now and then. Why? It is well built for the purpose of being able to withstand stress and compression. Making it very durable.
So if you have this unit in your home you would be seeing it for a very long time.
Not only does this model from Bosch brand have a high quality, but it’s also compact in size. Well, that’s the main advantage for getting an under sink water heater. It’s so small in size that it could fit in well under the sink. Without obstructing any movement.
This way you get to save a whole lot of space.
Similarly, Bosch ES4 can either be placed on a wall or put on the floor. So you have an option with this water heater. The most important thing is going for what suits you best. Since it’s not like this unit will perform any less if placed on the floor and not the wall or vice-versa.
Either way, you still end up enjoying using this product.
One of its down side though is its limited warranty.
Since heating water in your home is unavoidable, you might as well decide to go for a highly efficient water heater for your sink. In what sense? Well, the best option for your sink would be to get an under sink water heater like Atmor 3kw/110v water heater. That’s if you only need it for your sink either in the kitchen or toilet. You sure do not expect something this small to serve the whole house.
Yeah right! A water heater just for your sink’s use.
Surprisingly this small under sink water heater works so well. It’s not like it produces a large amount of water. But it does produce enough to wash your hands and rinse your plates.
And do you know what’s even better? The flow is consistent with the right temperature you need. It gushes at warm water within the twinkle of an eye and the water keeps coming even after minutes. Of course, still hot.
Might be what you need on a very cold night to keep your hands from freezing if you want to wash your hand.
Similarly, this under sink water heater is a saver. It consumes only 110 volts. Which means you would not have to consume so much electricity just do get this working. This way you get to reduce your electricity bill. And also save a few dollar bills.
A life saver it is indeed.
One down side is its installation. It would be very expensive if you are to call an expert to install this piece.
Do you have your sink located far away from your tankless water heater at home? And you have tried connecting it to this water heater but it isn’t working? Well, there is a way out of this mess. The solution is an under sink water heater. Lucky you, Bosch ES2.5 might just be able to attend to your needs.
This under sink water heater is so small in size that could fit in under a sink. As the name implies of course. So if you are so worried about where you would place this unit, worry no more. You can be sure that this unit does not occupy so much space. Instead it saves you a lot of space.
Way to go!
Another good news about this product. It only gives out water only when you need it. Its point of use. Which means it does not store up hot water. The disadvantage of storage water heaters is that it takes up a lot of electricity. Since it has to keep the water warm at all times. But with this product you have nothing to worry about.
You get to consume less electricity and save more money.
What more could you ask for in an under sink water heater.
The temperature control of this product from Bosch brand is also on point. It releases hot water at the right time with the appropriate temperature.
The only problem you might have in purchasing this product is its high shipping rates.
Thinking that this is like every other water heater mentioned above? Well, take that thought off your mind because it isn’t. Although this is another product from EcoSmart brand it is very unique. Ecosmart POU 3.5 tankless water heater is very easy to install.
If you are very familiar with water heaters you would know it isn’t a piece of cake installing them. Most times you have to call a professional to install this piece. Which a cost a fortune at times. But with this product from EcoSmart brand you are saved from this stress.
All you have to do is follow the installation guide step by step. And before you know it you would have finished installing it.
It’s really that easy.
This unit also helps save 12 cubic feet of storage space. So if you are so particular about a water tanker that wouldn’t take up so much space, this a good option to opt for. Well, that’s all thanks to its compact size.
That’s why it fits in well even under a sink.
Also, this under sink water heater gives out about 3.5kW of power output. Which when compared to conventional toilets is about two times better. So you can be sure that you wouldn’t be spending too much on your electricity bill.
Even though this is one of the best among other under sink water heaters, it only produces 0.5gpm. Which might not be sufficient sometimes.
You don’t need a third eye to know that this water heater isn’t any random heater. It’s impeccable design has paved a way for it among competitors and customers. WaiWela WM-1.0 is one of the best under sink water heaters when it comes to design. In little or no time you might fall for its charms.
It’s indeed a beauty.
That’s why this unit is most likely to fit in well in any part of your home. And would still add to the beauty of your home. It definitely can’t go unnoticed even if placed under a sink.
Well, beauty isn’t its only amazing feature. This under sink water heater is also known for its high quality. With a glass lined tank you wouldn't expect it to get damaged easily. Why? This high quality glass material is built majorly to withstand a lot of pressure.
So you can be sure you wouldn’t be thinking of replacing this under sink unit any time soon.
Also, this model from WaiWela brand has an adjustable thermostat that prevent overheating of your water. So you can be sure that you wouldn’t be having any case of skin burn with very hot water from your tank. All thanks to this regulator that keeps your water at an average temperature.
Similarly water is discharged at the right time. So you don’t have to wait for a long time to use a hot water from this water heater. It works within seconds. And of course your water would still remain hot after some time.
Well, you might pretty much not like the fact that this water heater has only 2 years limited warranty for its parts.
Searching for an under sink water heat that is powerful in terms of efficiency? Well, your search might just be coming to an end. Count yourself lucky to have come across this review. PowerStar AE-7.2 tankless water heater is a power house. It works efficiently by providing you with hot water at the right time.
Perhaps the reason why customers say this is one of the best under sink water heaters you can ever use.
Also, installing this piece is very easy. No rocket science is needed in installing this under sink water heater. All you need to know is what tools to use. Once you know this, you can easily follow the instructions of the manufacturer. And before you know it you can start using this unit without any problem.
Similarly, this product is very affordable. You don’t have to break into a bank to be able to purchase one of this. And since installation process is something you can do on your own, you wouldn’t have to spend extra money in installing this water heater.
Although this under sink water heater isn’t 100% efficient it is very close to perfection. It is 99% efficient. So close to being perfect. With this you can be sure that the number of problems you have with this unit is reduced.
You get to enjoy the long ride with this product from PowerStar brand in your home.
Although it consumes a bit more electricity than other under sink water heaters.
Another yet amazing product from Aristlon brand. This under sink water heater is really compact in size. That it could even fit the tiniest place in your home. This is why this is a good option for you to opt for if you are very conservative about space in your home. Especially if you have a limited space available. Aristlon GL6+S water heater would do the trick.
That’s why you would find this unit in the list of the best under sink hot water reviews in town.
Talk of a water heater meant for only your sink that saves up to 7 gallons of water per unit. It’s highly efficient. Now while you wash the dishes you would have enough water to go round to rinse all the plates.
This just makes your work in the kitchen a lot easier and fun. Since you don’t have to wait for water to come out. And once the water comes out it would be warm. So your hands won’t be freezing as you do the dishes.
This unit looks very unique. It doesn’t have the regular water heater look and this makes it very distinct. Not like you would mind having some very unique in your home. With Chronomite SR-20L it is most likely to fit in well into any design. And at the same time give your home a little spark in its look.
Might be what you need if you want to have something really different from every one’s water heater.
The fact that this unit is also horizontally installed makes it distinct. As most under sink water heaters you find out there have a vertical installation.
That’s also why it is also easy to install this unit.
Also, this unit is also very easy to carry because it is light in weight. Compared to other conventional water heaters that are a whole lot heavier this is easy to lift. So in case you decide to change the location of your water heater you have nothing to worry about.
You would be able to lift this up with any issue.
Although this water heater is indeed one of the best, customers have complained about it having a low water flow.
When you have an under sink water heater, you got what you need where you need it most. Whether it’s washing the dishes or doing the laundry, you won’t have to run out of needed hot water anytime soon.
Armed with high-powered burners, these tankless technology wonder can service your hot water needs in matter of seconds. It just take 15 to 30 seconds max to get all the hot water you want. No sweat!
This is most convenient for you as the unit is right under your nose. Right where you need it most. It’s for this reason that under sink heaters are dubbed as on-demand water heaters.
It’s totally logical. It’s like a MacDonald’s express – you just drive by and get what you need. How convenient is that?
On the other end, a standard conventional tank water heater cannot deliver on demand. With sizes that can accommodate 30 – 50 gallons, a standard tank simply is too big to be able to provide hot water on demand almost instantaneously.
Why? Because water in these tanks are on standby. These are heated and reheated every now and then. The heat, however, dissipates over time. The metal tank itself absorbs a substantial amount of the heat.
So when you need hot water, the tank heater responds by reheating the warm water to a certain heat level. And that takes time given the size of the tank. Definitely, a lot more time than an under sink water heater would need.
Well, there’s a catch though. Just to put things in perspective. You definitely will get all the convenience of an on-demand hot water with the under sink variety. But only when you’re using it alone.
Confused? It simply means that if more than two users are making the most of the water system at the same time, your on-demand water heater will fail you. It won’t be as effective.
So say, you decide to wash the dishes and your brother or your sister decides to take a warm bath, someone is going to feel cold water running through the skin.
The solution: Install another tankless device for the shower. Or schedule your water usage. If you don’t want to incur more initial expense buying a new one.
In a capsule, if you want to have hot water exactly where you need it fast, under sink is heaven sent. To max your efficiency, you can also install separate water heaters for appliances. Such as clothes washer or dishwasher, which uses a lot of hot water in your home.
Or for that matter, to service other water needs - like remote bathrooms or hot tubs.
2.) Longer Service Life
Well, detractors will always point out that under sink options are simply way too expensive compared to your standard tank variety. But under sink water heater reviews beg to differ.
But you don’t buy something without looking at the future. And for an on-demand water heater, the future is bright – brighter than the prospects of a conventional tank.
Note: Tankless models outlive tank varieties by a mile. If that doesn’t ring a bell to you, we don’t know what will.
The comparison is like buying a well-established branded car like Ford instead of a up-and-coming model from Kia. You know Ford outlasts Kia by a mile.
While it’s usual for a tank water heater to be useful within 10 to 15 years, tankless ones lasts 20 years or more. How’s that for a change?
That’s because a tank-dependent water heater will go bust the moment that tank deteriorates. Unfortunately, that happens sooner rather than later. Thanks to all the hard water present.
Also, the mechanisms in a tank water heater is constantly working heating and reheating water to a certain level of temperature. That’s a lot more work compared to tankless variety which work only when needed.
Why does it all matter? Because longer service life means greater savings for you over time. True, they may demand a greater amount of money on the buy but they lasts longer with you.
You wouldn’t want to drive a Kia that’s bound to break down every now and then on the road, right?
3. Greater Fuel Efficiency
Even better, over the years you’re bound to realize, under sink water heaters are more energy-efficient. Meaning: they’d eat far less energy per use compared to their tanked counterparts.
You may not believe it but data shows on-demand varieties can be as much as 34 percent more energy efficient compared to tanked ones.
And it takes no rocket scientist to tell you it’s simply a lot cheaper.
For this translates to over $100 savings annually. A lot of money saved over the years. Most importantly, savings big enough to offset the initial cost of the item.
That’s taking the long view. If you want to really save some, not limiting yourself to immediate costs can be a breather. All under sink water heater reviews sing that refrain in unison.
The calculations above are based on gas-propelled water heater. An electric-powered one can get as much as $44 a year, Department of Energy points out. It’s lesser than its gas cousin but it’s a big improvement over the standard tank water heater.
4. Easy to Set-up
One of the greatest concern of an on-demand water heaters is they could spell trouble in the installation department. Perhaps owe it to the circuitry. The complexity could be out of this world.
Well, the feeling may be overrated. Just like the first time you drove your car. You may feel jittery true but with a good amount of practice, it’s nothing you can’t handle.
And that’s the beauty of under sink models. Gone are the days when it’s some sort of a jigsaw puzzle that takes time to accomplish.
First stop, you won’t need to waste so much time to get them installed. Fact is they’ve become so user-friendly it’s like a plug-and-play Xbox. Almost. And yes, you can certainly install them on your own without needing any help from a professional.
Installing them under the sink is highly-recommended. That way, they’re closest to the supply of water and would therefore be most effective.
Alternatively, you can have them installed at the corner portion of your sink. Or if you feel like it, you can also mount them as a countertop item. It’s definitely possible.
Although having them out of your sight has its own obvious advantage. You get them out of the way. And dedicate the space to whatever chore you need done.
On top of this, you’re on-demand water heater is not a tall order when it comes to the maintenance department. No, not at all.
5. Great Time Saver
Let’s face it. When you’re unto the morning rush, you won’t have time to heat water. Even with the electric pot available. This time around you’ll never run out of hot water again. Or face the prospects of a cold breakfast.
In a flash of an eye, you get your hot water. And that could be the under sink water heater’s biggest advantage of them all.
You get what you need when you need it most. Absolutely waiting time to the utmost minimum. Making your desire for what’s instant attainable. Truly, you won’t need water in the kitchen to boil.
Plus, technology has caught up with the device. Today’s under sink water heaters can be operated remotely. It’s worth noting that you can operate these dispensers without touching them with your bare hands. All you have to do is operate them via your smartphone. Pretty neat right?
That should tell you, the under sink variety is bent on saving you time when it comes to giving you convenient hot water. Anytime.
That means you would be able to cut your kitchen tasks in half. For now you can do those chores in record time.
Just think: This hot water heater can give you as much as 100 cups of hot water in just one setting. That’s time saved. Instead, you can focus your attention on prepping food.
To date, under sink water heater is a wise decision. Critics have pounded on it for its bigger initial price. But isn’t that how true treasures go?
A prized diamond will certainly cost a lot higher. And yet, you can’t argue it would give you far more than a mundane stone of unknown origin.
For starters, under sink water heaters may be diminutive. They’re designed to be out of sight, located just where nobody will surely be looking. But that’s the beauty of it all. It doesn’t eat space.
You can’t stay the same for the stored tank water heater. That giant is going to give you headaches in the space department. One, somebody with a tiny house simply can’t afford.
In the fuel-efficiency department, under sink water heaters rule. They’d leave store tank varieties eating dust, put side by side. And you’d really have that warm water you need when you need it.
Of course, it’s not all a walk in the park. On-demand water heaters are there in a blink of an eye when you need them most. They’re instantaneous.
The problem is you won’t be able to spread so much love. Under sink water heaters just can service too many users at the same time. One is enough.
It’s with all these considerations that we tip our hats to Ariston GL4S Electric Mini-Tank Water Heater. You’d be surprised how much pride and admiration it has evoked from most of its users.
And that’s because you can’t really fault it when it comes to the energy efficiency department. It simply sails through, putting a big check in that box.
Most importantly, you’ve got reliability. The Ariston GL4S Electric Mini-Tank Water Heater delivers through the years. No wonder it has gained the attention of many under sink water heater reviews. If not most.
Of course, the rest on this A-list is worth looking into. And we certainly want you to do that. That’s for sure.