To reduce the risk of airborne disease transmission through fine particulate matter, air filtration is a viable consideration. The purpose of the study was to evaluate a potential economically feasible and effective method of filtration at a commercial layer facility. This project tested the efficacy of a low-grade air filter coupled with an Electrostatic Particle Ionization (EPI) system. The system was installed in the air inlets and was monitored for reducing particulate matter (PM) of the ventilation air. Temporal changes of building static pressure (SP) – an indicator to ventilation restriction by the air filtration system was also quantified.
According to field measurements, taken for the period of one year, removal efficiency of the EPI system was up to 80% in summer and 60% in winter. Depending on the time of year, the system resulted in a PM 2.5 and PM 10 reduction ranging from 30-66% and 36-68%, respectively. Removal efficiency became unstable when solely relying on the filter (with the EPI turned off) for PM removal. Filter replacement was needed after approximately 16 weeks of use during in the spring/summer months. It was found that the timing of filter replacement could be determined by analyzing changes in SP or by image assessment of filter appearance.