Friedrich AP260 5-Stage Air Purifier (HEPA, Carbon, Plasma, Pre-filter, Multi-filter), Energy Star Qualified and AHAM Verified 5-stage filtration with 4x more filter surface area than popular brands Effectively filters pet hair & pet dander, dust, pollen, tobacco, viruses, bacteria and mold spores High performance hepa filter captures up to 99.97percent of all particles as small as 03 microns Intelligent auto operation samples air quality and continually purifies air at the most efficient setting needed for your environment Air quality sensor lets you know the status of your air quality by detecting increased levels of pollution and changing color 5-Stage Filtration with 4X more filter surface area than popular brands. Effectively filters pet hair & pet dander, dust, pollen, tobacco, viruses, bacteria and mold spores. High Performance HEPA filter captures up to 99.97% of all particles as small as .03 microns. Intelligent Auto Operation samples air quality and continually purifies air at the most efficient setting needed for your environment. Air Quality Sensor lets you know the status of your air quality by detecting increased levels of pollution and changing color.