Indoor air can sometimes be worse than outdoor air—especially in tightly shut flats with lots of cleaning chemicals, cooking fumes and electronics. You don’t need high-end sensors to get a basic sense and improve things.
Use your senses. Persistent smells of dampness, chemicals, or stuffiness are signs something is off. If eyes or throat often feel irritated at home, that’s a clue as well.
Watch for mould patches, condensation on windows, or constantly foggy mirrors. These indicate high humidity and poor ventilation.
Make a habit of cross-ventilation when outdoor conditions allow it—open opposite windows for 15–30 minutes to flush out stale indoor air.
Add some plants—not as magical filters, but as gentle helpers. Combined with ventilation, they make the air feel fresher and may slightly improve humidity balance.
Limit heavy use of strong room fresheners, incense, and harsh cleaners. Opt for milder products and use them in moderation.
If you want a low-cost tool, even a basic hygrometer (to track humidity) and awareness of local pollution levels via phone apps help you decide when to open windows and when to rely on fans or air purifiers, if you have one.