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20x20x1 Air Filters

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Our most Popular 20x20x1 Air Filters, also referred to as 20x20x1 Furnace Filters of HVAC Filters.

    • 20x20x1
      Basic

    • $43/Box of 12
      ($3.58/ea)

      • Glasfloss 20x20x1 Air Filter GDS Series
      • Basic Air Filter
      • Glasfloss GDS Series
      • 20x20x1 (19-5/8 x 19-5/8 x 3/4)
      • Basic Equipment Protection
      • 30 Day Filter
      • (More Information)
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    • 20x20x1
      MERV 10

    • $51/Box of 12
      ($4.25/ea)

      • Glasfloss 20x20x1 Air Filter ZL Series
      • MERV 10 Air Filter
      • Glasfloss ZL Series
      • 20x20x1 (19-1/2 x 19-1/2 x 7/8)
      • Standard Allergen Removal
      • Up to 90 Day Filter
      • (More Information)
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    • 20x20x1
      MERV 11

    • $79/Box of 12
      ($6.58/ea)

      • Glasfloss 20x20x1 Air Filter MR-11 Series
      • MERV 11 Air Filter
      • Glasfloss MR-11 Series
      • 20x20x1 (19-1/2 x 19-1/2 x 7/8)
      • Superior Allergen Removal
      • Up to 90 Day Filter
      • (More Information)
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    • 20x20x1
      MERV 13

    • $149/Box of 12
      ($12.42/ea)

      • Glasfloss 20x20x1 Air Filter MR-13 Series
      • MERV 13 Air Filter
      • Glasfloss MR-13 Series
      • 20x20x1 (19-1/2 x 19-1/2 x 7/8)
      • Best Allergen Removal
      • Up to 90 Day Filter
      • (More Information)
    • Add to Cart

Which Air Filter is Best For Me?

Choose from our selection of 20x20x1 air filters (also referred to as 20x20x1 Furnace Filters of HVAC 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".

20x20x1 Air Filters