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Choosing an air purifier

Learn more about the types of air purifier and how they can make the air in your home healthier.

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Philips Series 2000i Connected Air Purifier.

Air purifier guide

Air purifier in room with family.

What does an air purifier do?

An air purifier 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.

An air purifier in a bedroom with illustrative graphics.

How does an air purifier work?

Most air purifiers use a fan to suck polluted air from around the room and push it through a series of internal filters. From here, the air is cleansed of pollutants and odours before being released back into the room.

An air purifier on a bedside table.

Air purifier benefits

Air purifiers improve the quality of the air in your home and keep nasty allergens at bay. They can also banish unpleasant odours such as pet smells, cigarette smoke and cooking fumes.

Air purifier features

Different types of air purifier filter the air in your home in different ways. Here's a brief round-up of the types of air purifier and the key features to look out for.

A family sitting and playing in a living room containing an air purifier.

Air purifier filters

HEPA air purifier - Air purifiers with HEPA filters are highly effective at catching microscopic particles that cause allergies and trigger asthma. Best for - allergies.

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. Best for - common household air pollutants.

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. Best for - smoke and odours.

UV air purifier - These air purifiers contain an Ultra Violet (UV) light that breaks down and destroys floating bacteria and airborne viruses. Best for - dust mites and mould.

Woman sleeping beside a Blueair Blue Pure 411 Air Purifier.

Quiet operation

Some air purifiers are certified by Quiet Mark, meaning they produce less noise pollution than other models. Ideal for bedrooms and nurseries.

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.


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


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

Choosing an air purifier for your home

Which air purifier is best for your room size?

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.

Two kids reading on a bed beside an air purifier.

Nursery and kids' bedroom air purifiers

Children take in more air than adults due to their smaller lungs, so it's important the air they're breathing is as clean as it can be.

An air purifier can be an invaluable addition to a nursery or kids' bedroom, especially if they suffer with allergies or respiratory conditions such as asthma. Even if they don't, the cleaner air quality will be better for their health and can even help them rest easier at night.

Air purifier reviews

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 don't, however, cleanse the air of impurities like air purifiers do.

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More help and inspiration

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

View our cleaning checklist

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View our allergy relief guide

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Protect your home from moisture, mould and condensation.

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