Singapore’s recent haze episode, its worst since 2015, has underscored the challenges of staying indoors to reduce exposure to unhealthy air. Experts stress that simply closing windows isn’t enough—effective air filtration, cooling, and ventilation all matter to keep indoor spaces safe and comfortable.
- Poor ventilation and heat build-up affect comfort when doors and windows are closed against haze.
- Air purifiers work best if properly sized and maintained, while fans only improve air movement without cleaning.
- Community haze shelters and healthcare spaces adapt systems to balance air cleanliness and comfort.
What happened
Singapore recently experienced a severe haze episode lasting 18 consecutive days with unhealthy air quality, marking the worst since 2015. In response, the National Environment Agency advised people to stay indoors and keep windows and doors closed to minimize inhaling hazardous particles. However, these measures also raised concerns about indoor temperature and air freshness.
As outdoor air quality deteriorated, residents, especially those without air-conditioning or with limited mobility, found it increasingly difficult to maintain comfort while protecting their health. Public haze shelters and healthcare facilities took steps to ensure cleaner air and cooling for vulnerable groups, but indoor environments still faced challenges balancing particle reduction and occupant comfort.
Why it feels good
Understanding the interplay between air filtration, ventilation, and cooling can improve the indoor experience during haze. When these elements are combined appropriately, indoor air quality is enhanced, heat and carbon dioxide do not accumulate excessively, and occupants feel cooler and more comfortable. This holistic approach helps protect health without sacrificing well-being.
Community haze shelters and healthcare settings demonstrate practical adaptations, such as using air purifiers and portable coolers alongside controlled ventilation. For the general public, using well-placed air purifiers, operating fans to increase airflow, and reopening windows when air quality improves can contribute to a more pleasant indoor environment despite the smoky conditions outside.
What to enjoy or watch next
Looking ahead, residents can anticipate weather patterns that may temporarily improve outdoor air quality, allowing for natural ventilation to refresh indoor spaces. Monitoring tools for indoor particles and air quality indicators like carbon dioxide levels are becoming more accessible and can guide when to adjust ventilation and cooling for optimal comfort and safety.
In shared buildings and homes, facilities managers and occupants alike are encouraged to evaluate their systems and practices for haze preparedness. Taking steps to balance filtration, ventilation, and thermal comfort will help communities better withstand future haze episodes with less discomfort and greater health protection.