Tower design True-Air Allergen reducing air cleaner will clean a large room up to 160 square feet ( 13 x 12 average size ). Never touch a dirty filter again - just vacuum the permanent HEPA grade filter clean . Low maintenance expense as you never have to buy replacement filters . Ultra quiet 3 speed motor . Use in upright position or on it's side for placement virtually anywhere in the home .Effective at removal of virtually all air borne allergens - including mold spores , pollen, pet dander .