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Fans can improve thermal comfort by increasing air movement across occupants, particularly in closed indoor spaces without air-conditioning. However, ordinary fans do not reduce room temperature, remove haze particles or introduce fresh air when they simply recirculate indoor air.<\/p>\n
Similarly, while air-conditioning provides cooling, its presence alone does not ensure adequate particle filtration or ventilation.<\/p>\n
Air purifiers can reduce indoor particle concentrations, provided their capacity is appropriate for the room. Effective performance also requires suitable placement, correct operation and regular maintenance.\u00a0<\/p>\n
Cooling, ventilation and air filtration need to be considered together. A comfortably cooled room may still have inadequate ventilation, while a room with effective particle filtration may become excessively warm. Haze preparedness should therefore address particle exposure, ventilation and thermal comfort as complementary aspects of indoor protection.<\/p>\n
In shared buildings, facilities managers can assess existing systems and establish procedures for responding to changing conditions. Monitoring indoor particles, temperature and carbon dioxide \u2013 the latter as one indicator of ventilation adequacy \u2013 can support decisions alongside information on occupancy and occupants\u2019 needs.<\/p>\n
In healthcare facilities, these arrangements must also be coordinated with clinical and infection-control requirements.<\/p>\n<\/div>\n
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