25x25x1 Electrostatic AC Furnace Air Filter Silver 94% Arrestance. Lifetime Warranty. Never Buy a New Filter Self-charging electrostatic filter media - does not require electricity EPA APPROVED ANTI-MICROBIAL COATING 100% SATISFACTION GUARANTEED OR MONEY BACK The air you breathe contains many irritants such as pollen, dust, bacteria, mold spores, pet dander and smoke. Most of these particles are smaller than one micron. Our ELECTROSTATIC FILTER is an effective and efficient way to reduce the number of these particles in your air. This unique characteristic improves air flow while providing maximum filtration. Never Buy Another Filter. Electrostatic and HEPA Air Filters. We offer permanent, metal-framed Washable Electrostatic filters from Kilowatts Energy CENTER. A necessity for allergy sufferers. 100s+ Sizes available - see our other listings