Honeywell 12520 Hepa Round Room Air Cleaner

Advanced design features deliver ultra quiet HEPA air filtration in a unit ideally suited for bedrooms and family rooms. Includes sound reducing insulation and no-draft air flow technology to minimize drafts from exhaust. Six air changes per hour in an 11' x 17' room.
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Similar model: Honeywell 50200 Round Room Air Cleaner
* Riter Research Inc. "Portable Room Air Cleaners Physicians Preference Study" 1998.
** Overall particle reduction depends on many factors including the amount of air processed, the pollutant type and the pollutants' introduction rate into the environment.