24″ X 24″ X 1″ Low-Resistance, Electrostatic Permanent Washable Filter (actual size – 23-1/2″ X 23-1/2″ X 3/4″) Never buy another filter! Our permanent washable filter is designed to provide great value and last a lifetime. This durable filter is constructed with a combination of woven polypropylene media supported by heavy-duty steel mesh in a galvanized steel frame. The filter carries a lifetime warranty and is ideal for heat pumps, sensitive 90+ efficient furnaces and systems with limited air flow. This is the best and last filter you will ever buy. FEATURES: Designed to minimize initial resistance to airflow Reduces the number of pollutants and allergens in recirculated air and keeps your HVAC system clean Uses natural static electricity to attract and capture airborne particles Washable – cleans up in minutes Includes anti-microbial polymeric protection Durable steel frame Dirt won’t get caught in the filter during washing – due to specially-designed dr