iheat Tankless Water Heater Reviews: Is It For You?

Water heaters are necessary in every home, no matter where you live. However, having storage tank heaters can become a hassle nowadays, given the maintenance and the space they require. However, for that reason, we have come up with 5 iheat tankless water heater reviews for you. Not only will they help you with all the water heating needs in your home, but you’ll also be able to tell all the benefits of having a tankless water heater at home. Let’s get into it!

iheat Tankless Water Heater Comparison Table

iheat Tankless S16Wattage: 18 KWAmperage: 75 AmpsCheck Price on Amazon
iheat Tankless M14Wattage: 13 KWAmperage: 60 AmpsCheck Price on Amazon
iheat Tankless S14Wattage: 14 KWAmperage: 59 AmpsCheck Price on Amazon
iheat Tankless AHS27DWattage: 27 KWAmperage: 112.5 AmpsCheck Price on Amazon
iHeat Tankless AHS18-DWattage: 18 KWAmperage: 75 AmpsCheck Price on Amazon

Now that you know our top 5 choices for the best iheat tankless water heaters out there, let’s find out in detail why. From the benefits and drawbacks of each of these models, you’ll be able to find out which is the best for you, and make that long term investment with a good mindset!

Top 5 Iheat Tankless Water Heaters

iheat Tankless Water Heater S16, 16 KW, 75 Amps

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The first water heater system in our reviews of iheat machines, is the iheat tankless s16 water heater. This comes with a stainless steel build which will ensure it is both long lasting, and will keep the aesthetic of wherever you place it. What’s great is that it isn’t even that big or heavy, so it won’t take up much space either. It also allows you to save up on heating costs by up to 60%, making it highly energy efficient.

Whether you’re at home or out by the ocean, you will find that the S16 water heater can easily live up to your expectations and more, by delivering you clean and healthy, hot water. On top of that, it comes with a digital display, and this helps make your work adjusting it much easier. You’ll also be treated to the fact that it can easily provide heated water to around 4 bathrooms, kitchens and dishwashers with a water rate of 3.5 gallons per minute. 

With around 240V usage, and a regular wattage, you won’t feel this drain to much of your electricity as well. Overall, this is definitely one of the best choices for water heaters out there. Along with the fact that they provide you with a year warranty in case you ever need to have it touched up. One of the only complaints it has received is the in/out cable it has, which can be a bit tricky to get used to.


  • Very small and elegant
  • Is very energy efficient at 60% on heating costs
  • Provides hot and clean water to almost 4 areas with ease
  • Has a digital interface


  • In/Out cable can be a bit tricky to get used to

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iheat Tankless Water Heater M14, 13 KW, 60 Amps

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The iheat tankless m14 water heater may be our second product, but it comes very close in terms of the best water heater out there. This is another great choice in terms of energy efficiency. It also comes with a stainless steel build, making it long lasting, especially against problems such as corrosion. 

The tankless m14 water heater comes in with a flow rate of 3 gallons per minute, which is a great performance to have. Not to mention, it can easily accommodate around 3 bedrooms in your home with ease. The incoming water temperature is also very easy to monitor and adjust, thanks to the help of the digital interactive display this model comes with. You’ll also find that this water heater works with very little disturbance with the help of its new flow technology, making it a worthwhile investment to heat up water in normal houses.

Overall, we think the m14 tankless water heater is definitely one of the best electric tankless heaters out there, and is definitely worth taking a look at. This works very well even in colder climates, however, some customers have reviewed their products of being defected, making the return process to get a new one an unnecessary inclusion. All in all, the product itself has perks that speak for itself!


  • Small and easy to install
  • Stainless steel build
  • Digital display for both fahrenheit and celsius
  • Can heat up water easily in multiple areas


  • Some products have been reported to be defected

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iheat Tankless Water Heater S14, 14 KW, 59 Amps

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This time we have the s14 tankless water heater, which is another heater with a stainless steel build, making it very resistant to corrosion, and also makes it a worthwhile investment due to its longevity. This iheat water heater also comes with a digital interactive display, making it much more optimized when being used. 

The s14 iheat tankless water heater is the 14 KW version of the s16, and apart from the lower performance from the machine, it has everything that the other version can do. As far as driving hot water to different areas in a house, it can manage 2 at a time. This still keeps it as a very viable tankless heater for your household needs. Not to mention, this is also a high efficiency water heater, saving up to 60% of the heating costs in your home. 

As far as hot water heaters go, this is a great choice for small homes, and you can rest easy knowing that your whole house will receive hot water at a good flow rate. One drawback is that this runs on 14 KW, making it power less appliances and/or rooms at a time in your home. However, these are still quality electric water heaters, and you won’t be disappointed by them.


  • Stainless steel build
  • Easy installation and small
  • Digital display
  • Highly efficient


  • Runs on lower power and provides hot water to fewer areas than other products

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iheat Tankless Water Heater AHS27D, 27 KW, 112.5 Amps

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When it comes to an electric tankless water heater, you want something with heavy duty power, and the AHS27D is one of those tankless water heaters. This is the next one in our reviews list, and this model also comes with a stainless steel build, making it great for long term use. It’s also a very small product, so you can place it in various places, without having any issues with your current water heaters as well.

The AHS27D electric tankless water heater has high energy efficiency when it comes to its inner workings, and it can save you quite a bit on the electric bill of your whole house. This tankless electric water heater also comes with a digital display, making your work in setting the incoming water temperature, much easier. The model is also designed to ensure you receive not only hot water, but clean water as well. You won’t have to worry about any tank water, and any water passing through this machine will be properly heated and to your desired settings!

The AHS27D also comes with a great 3 year warranty, making it a worthwhile investment for your whole house. The one drawback about this model is that it may be a powerful machine to use, but it will also use a lot of power, and produce around the same amount of water with a GPM of 3.62.


  • Small and easy installation
  • High energy efficiency in use
  • Has a digital display
  • Good warranty plan


  • Consumes a high amount of electrical power

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Iheat Tankless Water Heater AHS18D, 18 KW, 75 Amps

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Our last product in this list of reviews is the iheat AHS18D electric tankless water heater. This is also made up of stainless steel, so you can rest assured that it will last you for a long time, without worrying you about sedimentation or mineral buildup. As far as hot water heaters go, this will let you rest assured that you bought a product that can last you for ages.

The iheat AHS18D electric tankless water heater is ideal for warmer climates, as it is ideal for an incoming water temperature of 65 degrees fahrenheit. It’s water heating mechanism is also of a top notch quality, as it contains various sensors, thanks to the heat pro sensor, and this allows you to receive real time information of the quality and temperature of your water. Not only is this machine easy to use, but you it’s also very easy to set up, and won’t take much work. You’ll also receive a warranty for one year, however, make sure you get a professional to set it up, to not void it. 

While being very ergonomically developed for the user, it is also highly efficient in terms of energy usage, and will significantly drop your heating costs in your whole house. It is definitely one of the best electric tankless heaters out there, with a flow rate of 3.5 GPM, but it does pose the drawback of being properly optimized in highly temperate areas.


  • Stainless steel build
  • Great for warmer climates
  • Has various sensors and is ergonomically optimized
  • Has a good GPM of 3.5


  • Is optimized to work in warmer climates

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Benefits and Drawbacks Of Tankless Water Heater Systems

We’ve given you our reviews on 5 of the best electric tankless water heaters in our opinion. However, why would you choose electric tankless water heaters in the first place? We’re here to discuss both the benefits and drawbacks of using these systems for your hot water needs.

Benefits of Tankless Water Heater Systems

Let’s look into their benefits!

  • They take up minimal spacing in your whole house. You can have easy access to hot water, without taking up an unnecessary amount of space in your house, as they are tankless. They can usually fit under your sinks, or other places.
  • Iheat tankless water heater systems are tankless, making them much easier to maintain. With a tank unit, you’d have to clean out the tank unit at least twice a year for optimization.
  • An electric tankless water heater unit is very energy efficient. Not only will they use less energy, but the overall heating cost for you, will drop significantly if you use them.
  • A tankless water heater unit is easy to use, and you won’t have to bother much at all. They also usually have digital displays, making your job of adjusting the temperature much simpler.
  • They are very viable for long term use, as every unit uses stainless steel for the product, and this keeps them safe from various problems (sedimentation, mineral buildup) for a long time.
  • tankless water heater unit will be competitively priced, allowing you to look through multiple options throughout the market, and finding the best water heater at a relatively cheap price. This comes in especially handy when it comes to warranties, as these are long term investments with good deals.

Drawbacks of Tankless Water Heater Systems

There’s primarily one drawback to using a tankless water heater unit, and that is their incoming water temperature requirement. As you’ll have seen from some of these electric tankless water heaters, some require very specific temperatures to work in optimally. While they are still very efficient in other climates, they can be quite tedious to work around. However, if your climate is optimal for the usage of a tankless water heater unit, then you need not worry about it!

Watch the video about iHeat Tankless S-14 Electric Water Heater

Credit for This Video: Jeremias Vaughn

Final Verdict

Hopefully you’ve managed to come away with the best solution for your hot water needs! We’ve offered you the iheat tankless water heater reviews on the 5 best products in our opinion. Take a thorough look through each unit, and find one that suits your needs the best. What’s great is that most iheat tankless water heater products are very easy to use, and you won’t have much of an issue getting used to them. Make sure you find one that is most helpful for you. Our tankless water heater reviews have focused on a few different factors, ranging from their longevity, to how optimized they are for a whole house. You’ll also need to focus on whether a unit has a 1 year or 3 year warranty, to make sure you get the best out of it. It’s always best to go through these water heater reviews properly to make sure you make the best choice!