Air-Care electrostatic air filters are 10 times more efficient than the standard disposable filter. By switching to a permanent electrostatic furnace filter, the air inside your home will be cleaner and fresher. Our furnace filters are electrostatically charged to trap up to 94% of the dust and allergens in your home. Just easily wash the filter every 1-3 months and put it back in place. The sturdy galvanized frame will stand the test of time. With a limited lifetime warranty and 100% money back guarantee, why not make the switch to a permanent air filter? Electrostatic Air Filters clean the air by using static electricity, a safe, naturally occurring phenomenon. An electrostatic charge is generated by air flowing through a maze of static prone fibers. Airborne particles are attracted and held by the static charge until released by washing. Our Electrostatic Air Filters are an effective and efficient way to reduce the number of these particles in your air.