After public complaints of stuffy air and dizziness during extended visits, a municipal office building required an annual IAQ inspection under the Indoor Air Quality Management Act, along with remediation recommendations ahead of the next regulatory audit.
The 1990s-era building relied on a central HVAC system without outside-air regulation. CO₂ levels in several public-service areas exceeded the 1,000 ppm statutory limit, and open-plan layouts caused airflow short-circuiting and uneven air quality.
Measurement of nine indicators (CO₂, CO, HCHO, TVOC, PM2.5, PM10, bacteria, fungi, etc.) per NIEA A715.13C
Peak-hour sampling at 10:00 / 14:00 / 16:00 to reconstruct daily fluctuation curves
Hot-wire anemometry across each service zone, producing airflow heatmaps
Recommendations: new-air damper rescheduling, periodic window venting, and deployment of real-time IAQ sensors
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