This study investigates the variations in the PM_2.5 particles in a baghouse filter unit under variable airflow conditions. PM_2.5 emissions originate from the insect repellents commonly used in homes during warmer months, potentially affecting human health. Three low-cost sensors were installed at the entry, middle, and exit of the filter unit to measure the particle concentrations. Various filter combinations were tested. The findings revealed that using all filters achieved complete PM_2.5 retention, while reduced filter setups led to only a partial reduction. These results offer useful insights for optimizing the design and performance of air filtration systems.