Discount Water Filters and Air Filters at Discount Filter Store.com

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18 x 18 x 1 Air Filter Replacements

Choose between a number of different 18 x 18 x 1 air filters that will fit your furnace or air conditioner, each having its own unique benefits and features. When choosing consider what features are important to you: brand, quality level, efficiency, or allergen type. Whether you want to reduce pollen and pet dander or dust mites and bacteria, find the right 18 x 18 x 1 air filter for your home.
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  • Filtrete 600 Dust and Pollen Filter - 18x18x1 (6-Pack)
  • Filtrete 1000 Micro Allergen Filter - 18x18x1 (6-Pack)
  • Filtrete 1900 Ultimate Allergen Filter - 18x18x1 (6-Pack)
  • 18x18x1 3M Filtrete Ultra Allergen Filter (6-Pack)
  • Tier1 500 Air Filter - 18x18x1 (6-Pack)

    18x18x1 Merv 6 Universal Air Filter By Tier1 (6-Pack)

    $34.99
    MSRP: $37.34
    Save 6%
  • Tier1 1500 Air Filter - 18x18x1 (6-Pack)

    18x18x1 Merv 11 Universal Air Filter By Tier1 (6-Pack)

    $47.99
    MSRP: $50.34
    Save 5%
  • Tier1 1900 Air Filter - 18x18x1 (6-Pack)

    18x18x1 Merv 13 Universal Air Filter By Tier1 (6-Pack)

    $64.99
    MSRP: $67.34
    Save 3%
  • Tier1 600 Air Filter - 18x18x1 (6-Pack)

    18x18x1 Merv 8 Universal Air Filter By Tier1 (6-Pack)

    $40.99
    MSRP: $43.34
    Save 5%

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