Developed to be the ideal portable unit for stand alone for Hospital Rooms, Office rooms, Conference Rooms, Residential Buildings, Rooms in Homes, Recording Studios up to 2,000 Sq Ft. Multiple units may be used.  Looks great on a bookshelf or sitting on a tabletop. Front display indicates when dust screen cleaning is needed (typically monthly) and when CIMR cell requires replacement (3-years). Plugs into a wall outlet. Portable Only. Contains an internal fan system for circulation.