The Science Behind Extractor Fans: How They Work and Why They’re Important

Extractor fans are essential components of any modern home. They work tirelessly to keep the air inside your home fresh and healthy by removing excess humidity, cooking fumes, and other unwanted odours. As an electrical supply company, we understand the importance of extractor fans, and we want to share our knowledge with you. In this blog post, we’ll take a deep dive into the science behind extractor fans, how they work, and why they’re important. So sit back, relax, and get ready to learn about the unsung hero of home ventilation.

The Basics of Extractor Fans

Extractor fans are a vital component in modern homes and workplaces. They work by removing unwanted air from a room and replacing it with fresh, clean air. These fans are typically installed in areas where excess moisture or cooking odours are present, such as kitchens and bathrooms. The fan operates by drawing the air out of the room through a duct system and then expelling it outside.

Extractor fans work by creating a negative pressure inside the room, which causes the air to be drawn towards the fan. The fan blade system then pushes this air out through a duct and outside the building. The fan blades can be operated using a variety of power sources, including electricity, solar power, or battery power. An extractor fan that runs on electricity is the most common type in use today.

Understanding Airflow

To truly understand the importance of extractor fans, it’s essential to first understand the concept of airflow in a room. Airflow refers to the movement of air in a particular space. In a room, airflow can be affected by a variety of factors such as temperature, humidity, air pressure, and the presence of pollutants.

Extractor fans play a critical role in regulating airflow in a room. By removing excess moisture, cooking odours, and pollutants from the space, they help to maintain a healthy and comfortable environment. In addition, extractor fans help to prevent the buildup of harmful gases such as carbon monoxide by ensuring proper ventilation.

Types of Extractor Fans

There are several different types of extractor fans available on the market, each with their own unique features and benefits. Here’s a breakdown of the most common types:

  1. Wall-mounted extractor fans: These types of fans are installed on the exterior wall of a building and vent directly outside. They’re typically used in kitchens and bathrooms to remove excess moisture and cooking odours.
  2. Ceiling-mounted extractor fans: These fans are mounted directly into the ceiling and can be used in a variety of rooms, including kitchens, bathrooms, and laundry rooms. They’re particularly useful in rooms where wall-mounted fans aren’t feasible.
  3. Ducted extractor fans: These fans are installed within a duct system, allowing them to remove air from multiple rooms and vent it outside through a single outlet. They’re ideal for larger homes or commercial buildings.
  4. Inline extractor fans: These fans are installed directly into the ductwork and can be used to boost the effectiveness of existing ventilation systems. They’re particularly useful in areas where airflow is restricted.
  5. Bathroom extractor fans with lights: These fans are designed for use in bathrooms and feature a built-in light. They’re typically installed in the ceiling and vent directly outside.

Benefits of Extractor Fans

Extractor fans offer a range of benefits that can greatly improve the overall comfort and health of a living space. Here are some of the key advantages of installing an extractor fan:

  1. Improved air quality: By removing pollutants and excess moisture, extractor fans help to maintain healthy indoor air quality. This can reduce the risk of respiratory problems and other health issues caused by poor air quality.
  2. Reduced humidity: Excess humidity can create a damp environment that encourages the growth of mould and mildew. Extractor fans help to remove excess moisture from the air, reducing the risk of mould and mildew growth.
  3. Reduced odours: Cooking odours and other unpleasant smells can linger in a room, making it uncomfortable to spend time there. Extractor fans help to remove these odours, leaving the air fresh and clean.
  4. Increased safety: In rooms where gas appliances are used, such as kitchens and utility rooms, extractor fans can help to prevent the buildup of harmful gases such as carbon monoxide. Proper ventilation is essential for ensuring safety in these spaces.
  5. Enhanced comfort: By regulating airflow and maintaining a healthy indoor environment, extractor fans can greatly enhance the overall comfort of a living space.


At Electrical Discounted Supplies, we offer a wide range of high-quality extractor fans to meet the needs of any home or commercial building. Our knowledgeable team can help you select the right fan for your space and provide expert installation services to ensure optimal performance. Contact us today to learn more!