DESC: Are smoke, pollen, dust mites, mold spores and pet dander causing your allergies to flair? Indoor air pollution is more of a problem than ever and this desktop model addresses it squarely in your home or office. Its CADR (Clean Air Delivery Rate) rated for rooms up to 10´ x 12´ and features HEPAtech performance, two speeds, famous Whisper Quiet fan motor, filter check indicator chart, and easy drop-in filter replacement (includes 1 pack). The air purifier removes particles as small as 0.1 micron and change the air in the room up to six times per hour.