How Do Extractor Fans Work – All Necessary Information

An environment that is comfortable to work and live in has adequate ventilation.  To accomplish this, a powerful fan is needed. One can pick from a range of equipment but none can work like extractor fans.

The nature and size of the room, however, will decide the equipment required. Extractor fans are advised for use in wet rooms, including bathrooms, stalls, and kitchens. Why are extraction fans used?

This article will assist in providing the answer to that query by addressing their necessity of them, choosing advice, and upkeep and maintenance ideas.

How Do Extractor Fans Work? What Are They?

A ventilation system removes undesirable elements from the air, such as steam, smoke, heat, pollutants, and foul odors, allowing them to exit through the ducts and onto the outside walls.

They are put in bathrooms, toilets, and kitchens to eliminate dangerous compounds that might harm things.

Where In Your Home Do Extractor Fans Get Their Start?

How Do Extractor Fans Work - All Necessary Information

In the bathrooms – A lot of vapor is released into the air by hot water faucets and showers. This steam will be expelled by extractor fans, preventing it from harming the surfaces.

Kitchen – Are put in to make working in the kitchen more comfortable and safe by removing heat, smoke, steam, and foul odors produced there.

Toilets – As was already said, this device can exhume unpleasant air that would stay and make users uncomfortable.

Utility rooms – An extractor fan is necessary for a utility room, like in the bathrooms, to maintain air quality and prevent the space from getting overly humid.

Why Is It Required to Use Extractor Fans?

Extractor fans in bathrooms aid in removing the steam that hot showers and baths produce into the space. How come steam is so bad? This steam instantly condenses as soon as it touches the frigid restroom surfaces. Over time, mold begins to form, causing damage to the walls and floors and a musty odor.

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Microorganisms can thrive on damaged surfaces. People’s health is put at risk by prolonged exposure to these microorganisms and mold spores. They aggravate and cause signs like sneezing, coughing, and skin rashes. When a person has respiratory troubles, their symptoms may worsen, which can have significant health consequences.

How Can a Ceiling Extractor Fan Help?

How Do Extractor Fans Work - All Necessary Information

The fan draws moisture from the hot steam as it is expelled into a duct that leads to a vent hole. To avoid condensation and leaks that could cause rot, these ducts must be short, sealed, and fitted in a specific fashion. Regarding kitchens, cooking may produce a lot of heat, steam, smoke, and grease, making them nearly unusable, especially in the summer.

Such conditions are unsafe for humans and equipment, and they are unsanitary. An extractor fan will assist regulate the temperature, odors, and humidity, prevent fires, and most importantly, create sanitary working conditions.

Extractor Fan Types

When the extracted air doesn’t need to travel very far, axial fans with direct access to the outside are put inside the walls. By forcing the air upward, this mechanism forces it to flow through the fan by creating an air pressure difference.

  • Axial fans are utilized in bathrooms, commodes, and smaller rooms due to their compact size and quiet operation.
  • Centrifugal fans are intended for spaces without exterior walls. Using centrifugal force, they operate by spinning the air outward. Axial fans are quieter than centrifugal fans, which have a more extended range of air movement and a higher extraction rate. 
  • Mixed flow fans are the ideal synthesis of axial and centrifugal fans and are utilized in kitchens, large bathrooms, and large utility rooms. They have ducts that run longer and have a considerably higher extraction rate. Commercial kitchens can benefit from mixed flow fans since they are silent and can quickly transfer the air around any duct bends without compromising performance.

Advice For Selecting A Good Extractor Fan


Axial fans are advised for spaces with exterior walls. These fans, as was previously mentioned, can only function effectively with short ducts, that is, below 1.5 meters with two or fewer bends. Bathrooms, lavatories, and smaller rooms benefit most from axial fans. Centrifugal or mixed-flow fans are recommended for interior areas. They can move air 40 meters away, a more considerable distance.

Exterior Grilles

How Do Extractor Fans Work - All Necessary Information

These are used to hide the vents that let the air out. Exterior grilles come in two varieties: fixed and gravity grilles. When the extractor is running, gravity grilles often push open; when it is not, they close under their own weight; this avoids backdrafts. Backdrafts may occur through fixed grilles because they are always available. Fixed grilles, however, are quieter.

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Extraction Rates

When a fan is turned on, this is how quickly it removes air. Liters per second are used to express the rate. The extraction rate should increase for optimal ventilation as the room size increases and vice versa.


It can be highly distracting when extractor fans are loud. This could not have been known before the device was turned on. Please consider buying a less noisy fan, such as the mixed flow fan, if there are persons who are sensitive to noise.

Operating Time

This is more of a choice issue. While some fans have timers, others can be turned on with a switch or remote control. While some only light on when someone enters the room, some have humidity sensors.

Maintenance & Care of Extractor Fans

How the extractor fan is cared for affects top-notch performance and lengthy life. To assist you in caring for them, consider the following:


Whether in the kitchen, bathroom, or toilet, fans must be cleaned at least once every six months. You can p a professional cleaner to clean the blades and cover if you have long ducts. Extractor fans can be noisy for various reasons, including the buildup of dust, grease, and other substances.

Avoid using the extractors too much

They will break down more quickly if they are overworked. Choose the appropriate power setting for your kitchen appliance if you are cooking. Use the highest speed for effective smoke and grease removal with heavy frying. Use the lowest rate when you need to simmer or cook slowly.

Check to make sure the fans are correctly installed

In a few instances, dishonest installers vent the extract fans into attics or spaces between walls, significantly reducing the extractor’s efficiency. When installing the fans, be careful to thoroughly inspect the location of the vents.

Cons And Advantages Of Extractor Fans


  • In bathrooms where moisture breeds humidity and mold growth, extractors can eliminate the moisture.
  • Eliminating restroom odors and controlling the scents released when cooking to create a comfortable environment.
  • Heat can make home and working conditions intolerable.
  • Maintains the health of the walls and floors, keeping the walls from being damaged by mold.
  • As for kitchens, walls and surfaces don’t need to be cleaned frequently because they can extract steam grease. This heat is captured by an extractor, which replaces it with colder air to preserve the ambiance.
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  • The majority of these appliances are often loud and can scarcely be used if you or your family are sensitive to loud noises.
  • Extractor fans are not only expensive to buy, but they are also expensive to install.
  • A backdraft effect is seen in some. It occurs when the air evacuated is drawn back into the ducts, leading to fan inefficiencies. With fixed grille extractor fans, this is typical.

Question and Answer Sheets

Who Would Install An Extractor Fan, First?

You need an extractor fan if the air in your bathroom is consistently humid, has a musty odor, and mold is destroying the walls and floor. An extractor fan will work wonders if working in your kitchen during the sweltering summer days is uncomfortable, and oil has covered every surface.

Where in a bathroom is the ideal location for an extractor fan?

It’s ideal to have a fan installed on top of the shower or bathtub. The best extraction rate would be achieved by installing an inline fan in this location compared to other devices.

How Do You Install An Exhaust Fan?

The process needs to be handled by a qualified group. By doing this, the building’s façade and interior are protected against harm that would require expensive repairs.

Do Kitchen Extraction Fans Require Outside Venting?

Yes. The presence of an exterior vent guarantees efficient cleaning and cooling of the kitchen. It removes hot gases and steam and lessens the possibility of grease accumulating in the kitchen and the hood.

How Are Extraction And Recirculation Distinct?

Extraction is the process of eliminating steam and undesirable materials by sucking them up and delivering them via ducts to the outer walls. When air is recirculated, it is drawn through filters to eliminate odors, steam, and contaminants before being released back into space.


The extraordinary decision you can make is to have an extractor fan installed. It’s simple to initially believe that an open window would suffice in place of an extractor fan.

They are more successful, as the article demonstrates. A window cannot be opened during the winter since it will still let dust and moisture inside the building.

Be mindful of your needs when choosing the ideal extractor for you. If this is challenging, you can always ask to have a professional inspect your house.

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