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Electrostatic air filters, also known as washable air filters, are up to 10 times more efficient than standard disposable furnace filters. Electrostatic filters are washable and can be considered permanent filters. The furnace filters themselves are electrostatic, and stay charged by air passing through the metal crevices. When installed they trap up to 94% of the dust and allergens that pass through the filter. It is recommended that you wash your electrostatic furnace filters every 3 months, and by doing so they should last up to 5 years. They are designed with a heavy duty aluminum frame, two layers of special propylene weave on the front and back, with a unique poly internal lining.
Electrostatic air filters are considered washable because they use static electricity generated when air flows through the small crevices of the metal furnace filters. Particulates are then attracted to the metal and are trapped on the filter until it is washed out with water.
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