Air purifier features PlasmaTrue Technology that removes airborne pollutants at the molecular level, instantly neutralizing viruses and germs in the air. The True HEPA Filter captures 99.97 percent of particles and impurities as small as 0.3 microns, including mold spores, pollen, dust mites, allergens, cigarette smoke and odors. To keep your air purified, air purity sensor monitors and automatically adjusts the fan speed according to particulates and pollutants in the air. Carbon filter removes odors and captures large airborne particulates. Filter change indicators signal when the True HEPA and Carbon filters need replacing. User-friendly display panel effectively communicates machine performance. AP-300PH Air Purifier purifies medium-sized rooms up to 300 square feet. AHAM certified purifier also features ultra-quiet operation and includes True HEPA and carbon filters. Purifier is made of plastic. Energy Star qualified.