The April Aire Model 5000 Whole-Home Electronic Air Cleaner has been rated #1 three years running by a leading products ratings magazine for some very good reasons: It electronically charges particles and traps them like a magnet better than any other air cleaner. The particles are charged in the electrical field and then collected on grounded micro-fiber media. There is no monthly cleaning of collector plates like with other types of electronic air cleaners, in fact, the Model 5000′s media needs to be changed only once a year. The Model 5000 is tried, true, and tested – delivering the highest efficiency possible and the healthiest air in every room of your home.