Study of Indoor Air Quality in Buildings with Different Ventilation Systems Using Low-Cost Sensors
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Alvarado-Velez, Daniel
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Abstract
The indoor mass concentration of particulate matter (PM) is impacted by various factors such as air exchange rates, particle size, building characteristics, use of filters, etc. The infiltration factor provides an estimate of the amount of outdoor PM that penetrates a building’s envelope and remains suspended. In this work, we used linear regression to estimate the infiltration factors of PM1, PM2.5, and PM10 during unoccupied times in an office that utilizes 100% ambient air and compared them to the infiltration factors of two classrooms that have high air recirculation. We observed that large particles (2.5µm > Dp >10μm) have lower infiltration factors than fine particles (Dp < 2.5 µm) which is consistent with previous studies. Additionally, we observed higher infiltration factors for particles in the room that utilizes 100% ambient air, suggesting greater exposure to outdoor pollution in buildings that do not recirculate air.
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2023-01-13
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