Purifies and cools you. Removes 99.97% of particles as small as 0.3 microns Dyson technology helps create a cleaner, healthier home 360° filtration system uses activated carbon to remove gases and odors and a HEPA filter to capture 99.97% pollutants as small as 0.3 microns. Air Multiplier™ technology circulates purified air throughout the whole room Dyson purifiers capture wildfire smoke.1 1. Based on the capture of particles, ammonia, benzene, and acetic acid.