Immersion Heaters Selection Guide

Were you also searching for immersion heaters and how to find a good one for yourself and landed on this page? In the world of water heaters, immersion heaters play an important role. These heaters can be used in different settings to heat the water and make it perfect for use.

Selection best immersion heater for yourself will need a lot of understanding. There are so many different factors that play an essential role in finding the best immersion heater. These factors can range from the types of immersion heaters to the power of the heaters.

If you are also on the hunt for choosing the right one for yourself, but you don’t know how to, then worry not. This is a guide that will help you find the perfect immersion heater, as here we have mentioned detailed information about them. So, let’s jump right into the world of immersion heaters.

What are Immersion Heaters?

Before jumping into the guide for selecting immersion heaters, it is essential that you learn what these immersion heaters are. As the name suggests, the immersion heaters are immersed in the water and generate heat to warm it up. These heaters are a metal loop or a coil that is enclosed in a kind of sheath.

These immersion heaters have a power supply that is connected through a cable. The electricity from this cable then runs into the loops or coils and heats the water surrounding it.

Immersion heaters are suitable for heating water and can also be used to heat oil, gases, viscous liquids, and other solvents. One of the main reasons people love these heaters is that they are immersed and in direct contact with the liquid, so they work fast and efficiently.

The efficiency of these heaters is 100%, and there is net-zero loss, making it one of the best heaters you can use. Hence, these heaters are excellent and work nicely.

Different Types of Immersion Heaters

Now coming to one of the main parts of this article is the different types of immersion heaters. There are a lot of different types of immersion heaters that you can find in the market. So, the following are some of the most commonly used and readily available in the market.

 Screw Plug Immersion Heaters

The first type of heater is the hair pin-shaped and tubular electric elements. As the name suggests, this type of heater needs to be screwed and also placed directly in the tank wall and even the pipes. These types of immersion heaters are perfect for people who have small tanks.

Another great thing about these heaters is that they can be easily controlled, and you can change the temperature of your water, oil, and other liquids that you want to head. One of the greatest benefits you will be getting from this immersion heater is that it is fast and efficient. They are also very simple to use.

 Flanged Immersion Heaters

If you want immersion heaters for industrial purposes, the flanged immersion heaters are the perfect options. This type of heater is wedged to the flange, and then it needs to be bolted to the walls of the tanks so that it remains fixed.

These heaters are also very efficient and very easy to install. Another great benefit of these heaters is that it is also very long-lasting. These are perfect for heavy-duty work, and their downtime is also very low. The cleaning and maintenance of this heater is also pretty simple.

Over-the-side heaters

Over-the-side immersion heaters are used for freeze protection preheating the gas and oil. It is also used for viscosity control and other things. You can easily mount these heaters on the tanks and the cylinders and let them work properly.

These heaters are also used for larger tanks and don’t need any kind of changes in infrastructure. These heaters are also versatile and economically friendly. The major benefit the users get from these heaters is that you can remove them from the containers, clean them, and put them back without any hassle of emptying the tanks.

However, there is one con of this type of heater. You need to place the heater through the opening in the container. This opening can cause a lot of contamination, and the liquids will be exposed to the outside environment.

How to Find the Best Immersion Heaters?

Now that you know that there are three main types of immersion heaters, we have mentioned some points that will help you find suitable immersion heaters for yourself.

Sheath Material

The heater sheath material is one of the biggest things people need to know before getting the immersion heaters. The sheath material plays a vital role because very sheath material can’t be used with every liquid. This is why you need to look into the different types of sheath material and the maximum temperature they can go to.

Steel is one of the most common sheaths that is used in immersion heaters. The steel can go to 750°F and 400°C in temperature. The steel material can be used for the heating of hydraulic oil and simple oil. Then there is copper material that is perfect for the heaters and can be used for water that is for tap and municipal water only. The copper material temperature can go up to 360°F.

Lastly, we have the stainless steel material for the heater that can go up to 1200°F. This type is used for de-ionizing, de-mineralizing, and even processing the water.

Power Density

The next thing you need to know when it comes to immersion is the power density. The power density is critical to ensure no localized overheating or scorching of the heater. This is an important thing that you need to ensure when you are getting heaters. It is crucial that you pick the right power density because it will affect the life of the heater and also the fluid.


The wattage is also another thing that you need to consider when it comes to picking the immersion heaters. The wattage density is the spreading of the electricity over the coil to prevent the loops and the elements from burning out.

Getting immersion heaters with high wattage density is perfect if you want to heat water with a high mineral quantity. However, with immersion heaters with high wattage, you need to be more vigilant so that it does not cause burnouts.

Heating Element

The heating element is also essential to pick. You need to ensure that the heating element matches the type of water you will use. There are some heating elements that might not work with high-material water; however, there are some that will work. Hence, you need to ensure that you are picking the right one for the heater to work efficiently.


Budget is also an important thing to consider when you are getting yourself an immersion heater. There are immersion heaters that can cost you hundreds of dollars, and some might be that you can find cheap. With the budget, you also need to ensure that the quality you are getting is good.

Easy to Install

Installing the immersion heaters might not be something that can be done by everyone. This is why you need to find something that is very easy to install, and you can do it yourself. Some immersion heaters must be screwed to the tank wall, while others can be hung. This is why you need to pick the one that fits you and is convenient for you to install.

Temperature Controlling Feature

There are a lot of immersion heaters that come with the temperature controlling feature. This can be amazing because sometimes the temperature might get too high, damaging the heating element of the heaters. The temperature-controlling feature also ensures that the water does not get heated a lot.

There can be two different types of thermostats available, one being the adjustable. This means the users can adjust the temperature according to their needs. There is also a fixed thermostat option that is not as precise as adjustable, but the benefit here is that it is cost-effective and also simple to use.



Immersion heaters are getting a lot more popular and are being used for domestic and industrial use. However, finding the right one for yourself is a challenging task. You must ensure that you are researching and finding something that suits your requirements. Hence, we hope this guide was beneficial for you in understanding the immersion heaters.

If you are on the hunt for a place where you can get the best and highest-quality immersion heaters, then Hasteco is the best place for you. We have experienced and professional engineers that make the best industrial heaters. Additionally, we offer the best prices and top-notch customer service. So make sure you visit their website if you want to get your hands on the best immersion heaters.

Sales representive Luke


As the devoted CEO of Hasteco, I've spent countless years nurturing my passion for heating elements. Warmly inviting you to connect & collaborate for cozy, tailor-made solutions. Get in touch!

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