DESC: Platinum Air HEPA Air Purifier - This model has a 4 Stage Cleaning System with 3 power levels Built-in, independently controlled ionizer for extra cleaning power. The ProTec (TM) Antimicrobial treated filter helps prevent mold growth on the filter Odor-Lock (TM) Filter Technology helps remove common household odors. There is an Electronic filter change reminder and you can use The Platinum Air HEPA Air Purifier - 16200 in horizontally or in the vertical position in smaller areas.