FilterBuy 20x25x1 MERV 13 Pleated AC Furnace Air Filter, (Pack of 6 Filters), 20x25x1 &ndash; Platinum 20x25x1 MERV 13 Pleated Air Filter for AC HVAC or Furnace (Pack of 6 Filters). AFB Platinum MERV 13, comparable with MPR 1500 to 1900 (Ultimate Allergen Defense) or Allergen Elite FPR 10. HOSPITAL GRADE MERV 13 SYNTHETIC MEDIA: Attracts and captures airborne particles or allergens less than one micron in size such as pollen, fine dust, pet dander. Also captures bacteria, viruses carrying particles, mold spores and smoke. LONG-LASTING: Designed to last up to 3 months. Suitable for residential and business or commercial use (Industrial grade). MADE IN THE USA: Manufactured by FilterBuy in the USA using 100% American made components. Save big on a premium product by purchasing directly from the manufacturer. HIGH QUALITY: Filter frames are made of beverage board, which stays strong through humidity and temperatures up to 200 F. Synthetic media provides significantly higher particulate efficiency than standard cotton media.