Air filters are designed to capture particles like dust, pollen, and dirt in ventilation while air purifiers are designed to kill mold, bacteria, fungus, and even smoke, substances that filters cannot catch. While air filters are porous mesh filters, purifiers release ions that break down pollutants and gases into harmless components like oxygen and water vapor. All AC systems have air filters built in that are changed out every few months. Air purifiers, however, are optional. Those with allergies and sensitivity to pollutants may benefit greatly from an air purifier. Express Refrigeration recommends the iWave-R, the first self-cleaning, no maintenance ionization generator designed specifically for treating air in residential duct A/C systems. Express Refrigeration procures and installs iWave-R purifiers for only $800! Call today if you’re interested in installing a purifier or upgrading your filters.