The Honeywell Air Genius 5 Air Purifier is perfect for large rooms. The AirGenius 5 has intuitive touch screen controls including seasonal allergen and germ reduction settings. The patented ifD filter is extremely quiet and effective at capturing up to 99.9% of airborne particles. The ifD filter is permanent and easy to clean, simply wash the filter 4 times per year. No replacement filters are needed. The AirGenius 5 has an oscillation option that will quickly disperse cleaner air throughout the room. To ensure stated product performance, use only genuine Honeywell replacement filters.