"Indoor PM2.5 Concentration Dataset from a Low-Cost Optical Sensor During a Facade Retrofit in an Occupied Apartment"

"This dataset contains indoor PM2.5 concentration measurements collected using a Temtop LKC-1000S+ (2nd gen.) optical sensor during a 48-day facade retrofit in an occupied apartment (Tampa, FL, USA). Measurements were taken every 10 minutes and include time stamps, PM2.5 values (\u00b5g\/m\u00b3), and phase labels (facade work, cooking, background). The data support studies on indoor air quality, the impact of building retrofits, and sensor performance evaluation. No outdoor reference measurements are included; all data are anonymized and contain no personal information."