Proactively Screen Out Pollutants at Your Post Falls, Coeur d’Alene and Inland Northwest Home HEPA, which stands for High Efficiency Particulate Air, is a filter standard that removes 99.97% of particles 0.3 microns and larger, removing many of the worst pollutants and irritants from your conditioned air before they make it into your home. We’ve … Continue reading HEPA Filters