What Does An Air Purifier Do?

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Air purifiers enhance indoor air quality by removing pollutants and allergens, making it easier to breathe. They work by drawing in air, filtering out contaminants like dust, pet dander, smoke, and mould, and releasing clean air back into the room. HEPA filters capture tiny particles, while activated carbon filters absorb odours and gases.

Using an air purifier can reduce allergy symptoms, eliminate unpleasant odours, lower the risk of illness, and improve overall respiratory health. To maximise benefits, place the purifier in frequently used areas and maintain it by regularly cleaning or replacing filters.

What Does an Air Purifier Do?

In today’s world, where air pollution levels are rising, ensuring the quality of the air you breathe has become more crucial than ever. Poor air quality can significantly impact your lung health, often without you even realising it.

While it’s relatively straightforward to monitor outdoor air quality, understanding the air quality within your own home can be a bit more challenging. This is where air purifiers come into play. By improving indoor air quality, air purifiers help you breathe easier and maintain better health. This article will delve into what air purifiers do, how they work, and why they might be essential for your home or office.

What Do Air Purifiers Do?

Air purifiers are designed to clean the air by removing pollutants and allergens that can harm your health. These devices draw in indoor air, pass it through a series of filters, and then release clean air back into the room. This process effectively captures various contaminants, including dust, mould, pet dander, smoke, and unpleasant odours.

Air purifiers work by pulling in the air from your home or office. As the air passes through the purifier, it goes through different filters.

The most common filter is the HEPA filter, which traps tiny particles like dust, pollen, and pet dander. Another common filter is the activated carbon filter, which absorbs smoke and bad smells. Some air purifiers also use UV light to kill bacteria and viruses in the air.

Once the air has passed through these filters, the purifier releases it back into the room, now clean and free of harmful particles. This continuous process helps to keep the air in your living or working space fresh and healthy. By using an air purifier, you can reduce the risk of respiratory diseases, allergies, and other health issues caused by poor air quality.

How Do Air Purifiers Work?

Air purifiers operate using different types of filters to trap pollutants. Here’s a breakdown of the common filtration methods:

  1. HEPA Filters: High-efficiency particulate Air (HEPA) filters are highly effective at capturing tiny particles, such as dust, pollen, and pet dander. They can trap particles as small as 0.3 microns, making them ideal for those with allergies or asthma.
  2. Activated Carbon Filters: These filters are excellent at absorbing odours and gases, such as tobacco smoke or volatile organic compounds (VOCs). They work by trapping chemical pollutants within the carbon’s porous structure.
  3. UV Light Purifiers: Ultraviolet (UV) light purifiers use UV rays to destroy airborne bacteria, viruses, and mould spores. This technology is often used in combination with other filtration methods to enhance air cleaning effectiveness.
  4. Ionic Filters: These filters release negative ions that attach to positively charged particles like dust, causing them to settle out of the air or get trapped by an electrostatic collection plate.

Why You Might Need an Air Purifier

Various indoor pollutants can compromise air quality and your health. As a homeowner or tenant, you should be aware of these common indoor pollutants:

  • Combustion Byproducts: Including tobacco smoke and carbon monoxide, these can be particularly harmful.
  • Radon: A naturally occurring radioactive gas that can seep into homes and is linked to lung cancer.
  • Pet Dander: Tiny flakes of skin shed by pets can trigger allergies.
  • Dust and Mould: Common household contaminants that can cause respiratory issues.
  • Pesticides and Lead: Often found in older homes and can pose serious health risks.
  • Asbestos: Found in older building materials, asbestos fibres can cause lung disease.

If you experience symptoms like itchy or watery eyes, a runny nose, an itchy or sore throat, headaches, fatigue, dizziness, or respiratory issues such as asthma, an air purifier may be beneficial.

dog sitting next to air purifier

The Benefits of Using an Air Purifier

Air purifiers offer a range of health benefits, especially for individuals with allergies or asthma. Here are some key advantages:

  1. Reduces Allergy Symptoms: Air purifiers can significantly decrease symptoms for people with seasonal allergies or asthma by removing allergens from the air.
  2. Filters Smoke and Odors: They can help eliminate smoke, cooking odours, and other unpleasant smells from your home or office.
  3. Lowers the Risk of Illness: By removing bacteria and viruses from the air, air purifiers can help reduce the likelihood of getting sick.
  4. Improves Respiratory Health: Cleaner air means less strain on your lungs and overall respiratory system, lowering the risk of developing respiratory illnesses and even certain cancers.

Are Air Purifiers Safe?

Yes, air purifiers are generally safe to use. However, it’s important to note that no air purifier can remove all pollutants from your home. To maximise the benefits of your air purifier, consider the following tips:

  • Position it Properly: Place your air purifier in the room where you spend the most time. Ensure it’s in an open area to allow free circulation of air.
  • Regular Maintenance: Clean or replace the filters regularly. Depending on the type of filter and the level of pollution, this could be every 6 to 12 months. Check the manufacturer’s guidelines for specific recommendations.


These devices play a vital role in ensuring cleaner air by tackling common contaminants like dust, pet dander, smoke, and other airborne particles. By investing in a quality air purifier, you can significantly improve your overall health and well-being. Cleaner air reduces the risk of respiratory issues, alleviates allergy symptoms, and promotes better sleep.

Moreover, air purifiers help eliminate unpleasant odours from cooking, pets, and smoke, contributing to fresh air for living or working spaces. They also provide protection against harmful chemicals and gases, such as volatile organic compounds (VOCs), which can be present in household products.

Choosing the right air purifier tailored to your specific needs and room size ensures optimal performance and maximum benefits. Prioritising air quality is a crucial step towards creating a healthier, more comfortable environment for you and your loved ones. By understanding the importance of indoor air quality and the benefits of air purifiers, you can make an informed decision to enhance your quality of life.

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