3m Two-Speed Office Air Cleaner for Room Size up to 22' x 33' Office Air Cleaner for Room Size up to 22' x 33', Replacement Filter • Reduces dust, pollen and unpleasant odors • 3M™ Filtrete™ Media filter traps particulates down to .01 microns • Manufacturer’s lifetime warranty for original purchaser • Filter included—replacement sold separately Powerful Four Stage cleaning system. Two speeds. Easy-to-change filter. Wall-mount plate offers optional off-desk or off-floor placement. Replacement Filter (MMMOAC200RF), sold separately. 13-5/8w x 7-3/4d x 14h. Shpg. wt. 12 lbs.