Use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.

Air purifier guide

What is an air purifier?

An air purifier is a device that makes the air inside your home healthier to breathe. It does this by trapping the tiny, airborne particles that cause allergies, odours and irritation, while letting the clean air pass through.

How does an air purifier work?

Most air purifiers have a fan that sucks air from around the room and pushes it through a filtration system. From here, the air is cleansed of pollutants and odours before being released back into the room.

Benefits of air purifiers

There are many advantages of having an air purifier. For one, they keep nasty allergens like dust mites and pollen out of your home’s air flow. Another plus is that they banish unpleasant odours such as pet smells, cigarette smoke and cooking fumes.

How an air purifier filters the air inside your home varies from model to model. Here’s a brief round-up of the main types available.

HEPA air purifier

Air purifiers with HEPA filters are highly effective at catching microscopic particles that cause allergies and trigger asthma.

Ionic air purifier

This type of air purifier emits electrically charged ions which attract and attach on to dust and allergens and remove them from the air.

Carbon air purifier

If you want to remove odours, smoke and vapours from your indoor air then choose an air purifier with a carbon filter.

UV air purifier

These air purifiers contain an Ultra Violet (UV) light that breaks down and destroys floating bacteria and airborne viruses.

Air purifiers vs humidifiers

Although both air purifiers and humidifiers help improve the quality of indoor air, there are notable differences between the two. Humidifiers make the air around you cleaner and fresher by emitting water vapour into the air. They, however don’t cleanse the air of impurities like air purifiers do.

Shop all humidifiers

Many types of air purifiers are available, from basic models to more advanced ones with multiple features. Here are some key features to look for when choosing an air purifier.

Content Image

Speed settings

Air purifiers often have low, medium and high speed settings. Generally, the higher the speed setting, the more clean air is circulated back in the room.

Content Image

Quiet operation

It is useful to consider the noise levels of an air purifier, especially if you want one to run in a quiet environment such as a bedroom or nursery.

Content Image


An oscillating air purifier moves from side to side as it works. This allows filtered air to be evenly dispersed throughout a room.

Content Image


With a programmable timer you can schedule an air purifier to clean the air while you’re at work or asleep at night.

What size air purifier do I need?

In order to know what kind of air purifier is best for you, you'll need to work out the square footage of the room in which it’s being placed. Typically, desktop and mini tower models are best for small bedrooms, nurseries, and rooms up to 155 square feet. For living rooms and large bedrooms, opt for a tower or console model with a room size coverage of over 300 square feet.

Best rated air purifiers

More help and inspiration

Cleaning checklist

Our room-by-room guide to cleaning your house.

View our cleaning checklist

Allergy relief

Find the best products to help ease your allergies at home.

View our allergy relief guide

Heating & cooling your home

Find the right system to heat and cool your home.

Shop heating and cooling products


Protect your home from moisture, mould and condensation.

Shop dehumidifiers

Why buy at Argos?