Electrostatic filters use an electrostatic charge to attract pollutants and trap them on collector plates. Electrostatic precipitators use electronic cells to charge particles within the purifier and immediately trap the impurities on collector plates. The main advantage with this type of air purifier is that the collector plates never have to be replaced; they can be easily washed in the dishwasher. But if the collection plates are not cleaned frequently, they quickly lose efficiency. Be aware that some electrostatic precipitators also generate ozone, which is a known lung irritant.