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99.97% effective. Reduces common household odors, including pet odors, up to 30% better than other leading brands. Clean Air Delivery Rates of 101 smoke, 120 dust, and 120 pollen. With separate carbon pre-filter, ionizer, and three speed fan. Filter change reminders. Portable, compact design is ideal for floor or bookshelf use. Whisper-Quiet Hunter Fan draws air into the unit without the noise associated with many competitive models. Permanently charged HEPAtech Electret Filter effectively captures 99.97% of particles as small as 0.1 micron in size that pass through the filter. Ionizer distributes negative ions throughout the room to enhance the cleaning process while freshening the air. Effective Airflow Design exhausts clean, purified air back into the room from the top of the unit to avoid stirring up settled particles. Most air purifiers use disposable filters. Hunter units use a combination filter, which is designed to be easily replaced. The top-of-the-line Hunter models have pre