Did you know Australians spend about 90% of their time indoors? That means the air you breathe at home matters more than ever.
While outdoor air pollution gets the headlines, indoor air can be two to five times more polluted. And the culprits? They’re often right under our noses—everyday items and habits that introduce harmful particles and chemicals into the air.
Let’s take a closer look at the most common indoor air pollutants in Australian homes, their sources, and how to reduce your exposure.
1. Dust and pet dander
Dust mites and pet hair are two of the most common allergens found in Aussie homes—especially those with carpeted floors and furry companions. As pets shed, tiny skin flakes and hair particles become airborne and settle around the house.
If you’ve got a cat, dog, or other furry friend, check out our blog on building tolerance against pet dander for tips that can help pet owners breathe better with their furry friends.
Or if you’ve got an indoor cat and their litter box is giving you trouble, learn how to deal with it in our guide: Can air purifiers remove litter box smells?
2. Particulate matter (PM2.5 and PM10)
These ultra-fine particles come from indoor and outdoor sources—cooking fumes, wood heaters, bushfire smoke, and even candles. PM2.5 refers to particles smaller than 2.5 microns, which can penetrate deep into your lungs and bloodstream.
3. Volatile organic compounds (VOCs)
Found in paints, cleaning supplies, scented candles, and air fresheners, VOCs are chemicals that vaporise at room temperature. Many of them contribute to indoor air pollution and can cause headaches, respiratory issues, or even long-term health effects.
Want to know more about how these seemingly innocent scents can harm your air? Read our blog on scented products and indoor air pollution.
4. Mould spores
Australia’s humid regions—like coastal Queensland and parts of New South Wales—are ideal breeding grounds for mould. Mould spores become airborne and can trigger allergies, asthma, and other respiratory problems.
By reducing humidity by improving ventilation and using a dehumidifier, mould growth can be stopped in its tracks. However, if your household already suffers from mould issues, the existing mould needs to be addressed first.
KILL MOULD: How to get rid of mould
Prevention starts with humidity control. Learn how dehumidifiers help prevent mould in wardrobes and around the home.
5. Radon gas
This naturally occurring radioactive gas can seep into homes through cracks in floors or walls. Long-term exposure is linked to lung cancer, and it’s a lesser-known indoor air hazard that’s just as critical in Australia.
To learn more about this invisible danger, check out our blog: What is radon gas and why should you care?
How to protect your indoor air
The good news? A few smart changes can make a huge difference:
- ✅ Ventilate regularly – Open your windows to let stale air out and fresh air in
- ✅ Clean smart – Use low-VOC and natural cleaning products
- ✅ Control humidity – Use a dehumidifier to keep mould and dust mites at bay
- ✅ Invest in an air purifier – Choose one with HEPA and activated carbon filters, like the Ionmax Breeze Plus, to reduce airborne pollutants effectively
LEARN MORE: What is an activated carbon filter and how does it work?
Your home should be your safe space. Understanding what's polluting your indoor air is the first step to creating a healthier environment for you and your family.
