The primary difference between electrostatic and non-electrostatic air filters is that non-electrostatic air filters are disposable and electrostatic air filters are washable. Electrostatic filters use static electricity to trap particles in the filter. They normally need to be cleaned once a month. Non-electrostatic filters or disposable filters usually need to be replaced every quarter depending on use. Within Fiberglass Air Filters, there are 1 non-electrostatic options.