March 31, 2021

What is a centrifugal fan and how does it work?

Centrifugal fans

Everyone is familiar with a fan. But this variant needs a little explanation: this mechanical device moves air or other gases under a high speed. Such a centrifugal fan can manage high pressure differences well. We are happy to explain all about the this fan, how it works and how to make the proper choice.

What does a centrifugal fan do?

We’ll start with the basics. A centrifugal fan is a mechanical device which ensures the movement of air or other gases in a certain direction. This centrifugal fan is excellent at handling high pressure differentials, allowing you to use it in a variety of environments. Centrifugal fans often contain a tubular housing to guide the outgoing air in a certain direction. Or over a heat sink. In some cases, material is transported through the fan. Then the best option is to select straight blades and an open impeller construction. Furthermore, such a centrifugal fan can also be used to extract fumes, gases and dust. Do you wish to blow the room dry? That is also not a problem with a centrifugal fan.

Where can you utilize the centrifugal fan?

A centrifugal fan is suitable in various situations. They are often ordered for (industrial) kitchens, offices, schools, workshops and restaurants. A major advantage of the centrifugal fan is the noise level: this is a lot lower, making the installation of this fan perfect for offices or school rooms. Even in heavier industries, such as extraction at a woodworking machine, the centrifugal fan presents no problem.

Some examples of functions of a centrifugal fan:

  • Extraction of vapors;
  • Extraction of gases and dusts;
  • Dry blowing of the room;
  • Cooling and heating;
  • Conveying of bulk;
  • Air exchange;
  • Filtering

How does a centrifugal fan work?

A centrifugal fan has a low air capacity but a high resistance to different air pressures. This is because a centrifugal fan can increase the speed and volume of the airflow using the rotating impellers in the fan. The fan uses the centrifugal force which is provided by the rotation of the impellers. In this way, kinetic energy of the air or gases is increased in a higher pressure.

When the impellers rotate, the gas particles near the impellers are ejected and then move toward the fan housing. The gas is directed toward the outlet through exhaust ducts. Has the gas been ejected? Then the gas pressure in the center area of the impellers decreases. Gas from the impeller eye flows in to then normalize the air pressure. This cycle is repeated, allowing the gas to move continuously. To finish: a picture of such a centrifugal fan.

Centrifugaal ventilator

Important criteria for making the best choice

When you are looking for a centrifugal fan, it is important to ask some essential questions. There are many available options, which might make the choice more difficult. We would like to help you with some of the criteria. Of course, the basics are the most important: what kind of work environment will the fan be used in? Working conditions and the environment play a big role. We will list a few points for you to consider:

We list a few pointers for you to consider:

  • How much air and pressure does the fan need to handle?
  • What is the available power supply on site?
  • What type of drive would you like?
  • What type of medium will be transported?
  • Are you dealing with higher temperatures?
  • Will the centrifugal fan have an indoor or outdoor installation?
  • What is the desired sound pressure?
  • What about explosion protection?

Thus, it turns out that there are quite a few aspects in which the right choice is very important. Different criteria apply to each application. Want to spar with one of our specialists? You can do so at

How can you maintain the centrifugal fan?

Prevention is better than curing the problem: the same goes for a centrifugal fan. Maintenance is very important for any piece of equipment in your working environment. A great advantage is that no special tools are required to carry out maintenance on your centrifugal fan. A small tip in advance: perform maintenance when the power is disconnected. Obviously, only trained people and skilled personnel should perform maintenance on the centrifugal fan. Since the centrifugal fan can handle high pressure differences, it is important to have this maintenance done in a timely manner. Lubricating the bearings at the right time intervals with the right amount of grease: you need a specialist for that. If this maintenance is not carried out correctly, there is a chance of permanent damages. Furthermore, during maintenance, the tension of the belts is examined for the optimal use of your centrifugal fan. That way, the lifespan is extended. The flexible coupling in the centrifugal fan is checked and lubricated with the recommended lubricant once every 3,000 operating hours. Finally, all parts that have come into contact with the air flow are checked and then cleaned. This way you are assured of the best maintained centrifugal fan.

Different criteria apply to every application and work environment. The search for the right centrifugal fan can be a challenging one. Fortunately, you can call one of our specialists at 033 – 465 13 92, completely free of any obligation. Would you rather send an e-mail? You can do so by sending an e-mail to We are ready to assist you in any kinf of way!

Check out the centrifugal fans from Slingerland Techniek

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Slingerland Techniek understands that it is difficult for companies to indicate exactly what they are looking for. In order to provide companies with the best possible service, we look at the business situation together. Then the possible solutions are discussed so that we can solve your business problem in full consultation.
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