Wellness & Guides

Indoor Air Quality Basics: Ventilation, Filters, and Simple Upgrades

AussieNut Staff Member

31 Mar 2026 — 2 min read

Indoor air can be 2–5 times more polluted than outdoor air. Here is how to fix it without spending thousands.

When we first heard "indoor air quality," it sounded like something only new-build homes needed to worry about. Turns out, older homes (and even newer ones) can trap all sorts of stuff you do not want to breathe all day.

The good news: most of the fixes are either free or cheap.

The free fixes

Open windows daily (even 10 minutes helps flush out stale air)
Use exhaust fans when cooking or showering (moisture equals mould)
Remove shoes indoors (tracks in pesticides, pollutants, allergens)
Vacuum weekly with a HEPA filter (reduces dust and allergens)

These cost nothing and make a noticeable difference within days.

The $50–200 upgrades

Air purifier with HEPA filter (start with the bedroom — you spend 8 hours there)
Upgrade HVAC filters (MERV 11–13 rated — catches more particles)
Add indoor plants (snake plant, pothos — modest effect but nice to have)

We started with a bedroom air purifier and noticed better sleep within a week — less congestion, clearer mornings.

What to avoid

Ionizers and ozone generators can create harmful byproducts. Stick with HEPA filtration — it is proven and safe.

Scented air fresheners and plug-ins do not clean air, they just mask smells with chemicals.

Where to start

Pick one thing this week:

Open windows for 10 minutes every morning
Run the rangehood when cooking
Buy a bedroom air purifier if you can swing it

Air quality is not about perfection. It is about reducing your daily exposure, one simple change at a time.

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