Oreck's EP air purifiers feature an electrostatic precipitator filter that is permanent and never needs replacing. (The Truman Cell® is Oreck's exclusive EP filter.) This type of filter is composed of a series of metal plates and wires. Particles from the air are positively charged as they enter the cell wires and then are attracted to negatively charged plates where they stick until
Oreck's EP air purifiers capture dust, allergens, smoke, pet dander and pollen particles from the air that passes through its filter, pulling them out of the air like a magnet.