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Select Your Filter Size

20x25x4 Air Filters

    • 20x25x4
      MERV 10

    • $72/Box of 6
      ($12.00/ea)

      • Glasfloss 20x25x4 Air Filter ZL Series
      • MERV 10 Air Filter
      • Glasfloss ZL Series
      • 20x25x4 (19-1/2 x 24-1/2 x 3-3/4)
      • Standard Allergen Removal
      • Up to 180 Day Filter
      • (More Information)
    • Add to Cart

    • 20x25x4
      MERV 11

    • $97/Box of 6
      ($16.17/ea)

      • Glasfloss 20x25x4 Air Filter MR-11 Series
      • MERV 11 Air Filter
      • Glasfloss MR-11 Series
      • 20x25x4 (19-1/2 x 24-1/2 x 3-3/4)
      • Superior Allergen Removal
      • Up to 180 Day Filter
      • (More Information)
    • Add to Cart

    • 20x25x4
      MERV 13

    • $223/Box of 6
      ($37.17/ea)

      • Glasfloss 20x25x4 Air Filter MR-13 Series
      • MERV 13 Air Filter
      • Glasfloss MR-13 Series
      • 20x25x4 (19-1/2 x 24-1/2 x 3-3/4)
      • Best Allergen Removal
      • Up to 180 Day Filter
      • (More Information)
    • Add to Cart

Which Air Filter is Best For Me?

Choose from our selection of 20x25x4 air filters below. To compare filters to one another, simply check the compare box by the filters you would like to compare, then click "Compare Selected".

20x25x4 Air Filters