A powerful and compact design air purifier that cleans up to 25 square meters and it fits in any space from bedrooms, medium sized living rooms, gyms, offices, basements and more Simply turn it on and enjoy your cleaner air, quiet enough to run all night long, even on the highest fan setting Equipped with washable pre-filter, allergen-free Catechin deodorizing HEPA filter that removes pet, tobacco, cooking, toilet, sewage outlet odors This Hitachi Air Purifier suppresses build-ups of mold, cedar pollen and dead house dust mite substances Has 3 auto modes: Air purify, Odor, Pollen, operated through remote control or by the manual slide switch With odor sensor that automatically adjusts the fan speed to maintain clean air and this air purifier has British Allergy Certification seal