The compact way to catch dust mites, debris, pet dander, pollen, tobacco smoke, mold spores and more! The Holmes air purifier fits nicely into small spaces, such as a home office or nursery. This highly effective way to clean the indoor air is quiet and easy to operate. It"s equipped with the new aer1 filter system, which creates the most effective filtration system available. Aer1 offers customized effectiveness to suit your needs. Choose from total air with dust elimination (included in unit), allergen remover, odor eliminator and germ fighter. Comes with filter change indicator.