The use of filters to prevent the spread of the PRRS virus is well supported, but current use of filters on exhaust fans is limited due to the high clogging rate from dust. The use of an ionization filter before an antimicrobial filter was tested to see the effect on the concentration of dust particles. The ionization filter system works by creating a negative charge on dust particles, so they attach to surrounding surfaces. Air then passes through MERV13 prefilters before exiting through antimicrobial filters. Additional antimicrobial filters in the attic prevent backdraft contamination. The ionization filter  was found to reduce dust particles by 64% and bacteria concentration by 83% before the antimicrobial filter. This system could allow quarantine and farrowing units to reside in the same building with minimal risk of PRRSv spread by exhaust air, and greatly reduce the maintenance required on exhaust filters.