PM2.5 at Home: 8 Ways to Reduce Dust in Your Bedroom
8 ways to cut PM2.5 in the bedroom, from reading the Air4Thai colours and sealing gaps to sizing a purifier by CADR…
Air Quality & PM2.5
Air purifier reviews and practical ways to deal with PM2.5 at home in Thailand: CADR, filters, running costs and where to put the machine.
2 articles in this category, last updated Oct 14, 2026
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Best Air Purifiers in Thailand 2026: 7 Models Compared by CADR
Our pick Xiaomi Smart Air Purifier 4 Lite
Where to start
If you are buying your first air purifier, start with the room you spend the most time in, usually the bedroom. Multiply the floor area by 12 to get the minimum CADR to look for: a 20 m² room needs a CADR of about 250 m³/h or more.
During heavy dust, a purifier only works in a closed room. Check the outdoor level on the Pollution Control Department’s Air4Thai app and open the windows only on blue or green days.
