Honeywell HFD323 AirGenius 5 Air Cleaner & Odor Reducer 3 Stage Cleaning System: Washable or Odor-Reducing Pre-Filter (you choose); Washable ifD Filter; Electronic Ionizer. Washable, reusable 99.9% effective QuietClean ifD HEPA-Type Filter captures microscopic airborne particles and allergens Circulates room air 5 times per hour. Quiet Performance Oscillates to disperse fresher, cleaner air