Air purifier guides for Singapore homes
Specific answers with the numbers behind them. Every guide shows when it was last updated and where its figures come from.
Choosing a purifier
- How to size an air purifier for your roomWork out the clean air output (CADR) your room needs from its size and a target number of air changes an hour, with a calculator and figures for typical HDB rooms.Updated 15 October 2026
- Air purifiers for a 4-room HDB flat: how many does our model suggest?A worked example for a typical 4-room HDB flat: how much clean air each room needs, what covering every room costs over two years, and what one, two or three purifiers achieve.Updated 15 October 2026
Haze season
- PSI vs PM2.5: how to read NEA's haze readingsWhat Singapore's 24-hour PSI and 1-hour PM2.5 readings mean, how NEA converts PM2.5 into PSI, the official bands, and which number to check for what.Updated 15 October 2026
- Getting your home ready for haze, room by roomPractical steps for Singapore homes during haze: what shutting windows does and doesn't do, where purifiers help most, doors, air-con, placement and filters, with measured indoor figures.Updated 15 October 2026
Rather see your own home? The planner sizes purifiers for every room and shows where the clean air reaches.
Plan my home