Your aircon isn’t cleaning your air, and bowls of water won’t either: What haze does indoors

Syida Nasri, Airscan’s head of indoor air quality and a Department of Occupational Safety and Health-accredited indoor air quality assessor, said fine particulate matter measuring 2.5 micrometres or less (PM2.5) could enter homes through gaps around windows, doors and other openings, even when they were kept closed.

“Merely staying indoors isn’t enough to protect against the haze,” she said.

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