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Bosch AE115 Electric Tankless Water Heater Review

In this article, we will be taking a look at the Bosch AE115 electric tankless water heater reviews. 

We will first start with an introduction, followed by the key features of this water heater and last but not least, its pros and cons. Let's get started.

Why Get A Tankless Water Heater?

It is very important to have properly heated water in your shower, and especially when it’s cold out there. People use various methods to get hot water.

There are some buildings which have a large communal water heater that does the job for the whole building.

These are efficient, which makes them quite cheap. However, not everyone has this luxury.

Many buildings and homes need to have their own water heating system in place. This is problematic for several reasons.

One of the most important ones is the cost of electricity used to power the heater.

In some areas, power companies offer cheaper electricity at night, so people turn on the heaters then.

However, this is quite a small percentage of users, since power companies are notoriously stingy.

The solution to these problems is the humble electric tankless water heater.

People all over Europe are already using them, but they are gaining in popularity elsewhere too. We will see what the benefits of these heaters are, how they work, and how this model can benefit you.

Bosch Electric Tankless Water Heater Reviews (Model AE115)

1. No Heat Loss

Bosch electric tankless water heater reviews

The thing that usually comes to mind when we think about water heaters are bulk heaters.

They are those huge heating units that store large amounts of water in a tank to heat it up. 

They have to be extremely well-insulated to minimize heat loss. That is because these heaters take a lot of time to heat all the water through, and people don’t use the water immediately.

Nevertheless, there is always heat-loss, no matter how well-insulated these heaters are.

One of the most important reasons for that is the delay between heating the water and actually using it. 

That means you pay for electricity that doesn’t effectively get converted into heat, which is inefficient and wasteful. The AE115 simply avoids this problem altogether.

2. Savings on Electricity

As seen in the previous section, tankless water heaters can save you money on electricity bills.

The exact percentage you save depends on the type of tankless water heater you get, as well as its quality.

Manufacturers usually like to boast about the savings right on the package, and there is no reason not to take their word for it in this case.

Another benefit is that these heaters reduce greenhouse gas emissions substantially.

There is another important factor that helps you save money. This heater only works when you tell it to.

It only heats up as much or as little water as you need at any given time. Check out other models here to compare.

That is why these are often called ‘on demand’ water heaters. This is both convenient and cost-effective.

You are never out of hot water, and you don’t have to waste energy to get it.

3. Lasts Longer than Other Competitors

The Bosch AE115 is a German-quality product, built to last. In fact, it can last up to 10 years longer than bulk heaters, according to experts.

Because bulk water heaters have to store water constantly, they have more of a tendency to corrode.

This can lead to malfunctions, and even some scary situations, as we will see.

Tankless water heaters, on the other hand, are much easier to maintain, and less prone to corrosion. That means there is less for you to worry about.

4. It Saves Space

Bulk heaters are, as the name suggests, bulky. This is part of the reason why people use tankless water heaters extensively in Europe, where rents are high, and space is scarce.

In fact, this heater can be installed pretty much anywhere. People have put it under cabinets, in closets, and generally out of sight.

That also adds to its efficiency, especially if you have a small bathroom.

Other Types of Applications:-

5. Safety Concerns

People generally agree that tankless water heaters are safer than bulk heaters.

There are several reasons for that. Bulk heaters are more likely to corrode, as we mentioned previously.

That can lead to holes forming in the tank, which leads to leaks. In fact, many people have seen their house flooded because of this problem.

Once the water starts flowing out of a bulk heater, there is no way to stop it. With tankless water heaters, it’s a different story entirely.

If there is a leak in this heater, you can simply shut off a valve, and it will stop.

Furthermore, any plaque buildup is much easier to clean out of a tankless heater than out of a bulk heater.

Read our related reviews on the best gas tankless water heater in the market today.

6. Limitless of Hot Water Supply

We have mentioned this benefit previously, but it bears repeating. With this superb heater, it is impossible for you to run out of hot water. 

As long as you have water and electricity, you will have hot water.

What that means in practice is that there will be no more nasty surprises when you get into the shower and get splashed with cold water.

Why Should I Buy The Bosch AE115?

There are many tankless electric water heaters on the market today. The Bosch AE115 stands out as one of the best in its class.

That is due to the precision engineering and attention to detail Bosch employed for this product.

Unlike some other tankless water heaters, it doesn’t try to power more than one tap at a time.

That makes it useful if you have a particular place you want hot water, but can’t otherwise get it there.

It also means it is energy efficient, since it doesn’t waste energy trying to do more than Bosch designed it to do.

As with any tankless electric water heater, there are certain energy requirements for this unit. The manufacturer points out that the minimum electrical service to the home must be 150 amps.

It also requires 240 volts, and 17 kilowatts. For these reasons, you should consult an electrician as well as a plumber when installing this unit.

In terms of its capabilities, the manufacturer claims that this unit has an energy efficiency rating of more than 90%.  

This brand is also certain that their heater will last you a long time. That is why they are offering a generous 10-year warranty.

Other Related Electric Tankless Water Heater Reviews:-

The Pros and Cons

In order to have a clearer understanding of this tankless water heater, let’s take a look at a brief list of pros and cons for it.


  • Can fit anywhere: This is quite a compact water heater. It was designed to fit into any space where you would need hot water, no matter how small.
  • Energy efficient: Its 90% efficiency rating sets this unit apart from many competitors. That is the result of precise German engineering, and Germans mean business.
  • Generous warranty: Bosch offers a 10-year warranty on this unit. That means they are betting that it will last you substantially longer than that. This reasoning makes this water heater a safe investment.


  • Not for all climates: This unit is not suitable for particularly cold climates. The manufacturer states that it will struggle to heat up water that is below 60°F inside the pipes.

How Does This Tankless Water Heater Work?

People are often skeptical of tankless water heaters because they don’t understand how they work.

The mechanism is actually very simple. You install this heater directly on your water pipes. Then, the water is heated as it passes through the unit.

In order to accomplish this, the heater must have a strong heating system. In fact, it uses a heat exchange unit to heat water up rapidly.

The heat exchange unit produces heat by way of induction. To put it simply, it pumps electricity through resistant materials, which produces a lot of heat. The exchange unit then transfers that heat to the water.

Final Verdict

Bosch AE115

Our Rating

As we have seen, this has been one of the more comprehensive Bosch AE115 electric tankless water heater reviews. We have showed you that this water heater is going to be a worthwhile investment on your part. 

That is because this heater is far more efficient than bulk heaters in general. The 2 things we love the most is its durability and efficiency rating.

All in all, we would give this product a 4/5 stars.

    Verner Ellen

    Hi, my name is Verner Ellen. I am a homebody whose interest is in getting the best home tools and equipments to help with the the everyday house chores. I also love fitness, cooking and grilling. Maintaining a clean and comfortable home is my lifelong passion.