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

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Tier1 500 Air Filter - 20x20x1 (6-Pack)

(Retail Price: $33.34 ) $30.99

Tier1 1500 Air Filter - 20x20x1 (6-Pack)

(Retail Price: $149.99 ) $52.99

Tier1 1900 Air Filter - 20x20x1 (6-Pack)

(Retail Price: $80.34 ) $77.99

  • Basic

    MERV 6

    • Lint Dust
    • Pet Dander
    • Mold Spores
    • Pollen
    • Dust Mites
    • Fine Dust
    • Auto Emissions
    • Smoke
    • Tobacco Smoke
    • Bacteria
    • Very Fine Dust
    • Odor
    Particle size Effectiveness
    Large 35 - 50%
    Medium -
    Small -
  • Advanced

    MERV 8

    • Lint Dust
    • Pet Dander
    • Mold Spores
    • Pollen
    • Dust Mites
    • Fine Dust
    • Auto Emissions
    • Smoke
    • Tobacco Smoke
    • Bacteria
    • Very Fine Dust
    • Odor
    Particle size Effectiveness
    Large > 70%
    Medium -
    Small -
  • Premium

    MERV 11

    • Lint Dust
    • Pet Dander
    • Mold Spores
    • Pollen
    • Dust Mites
    • Fine Dust
    • Auto Emissions
    • Smoke
    • Tobacco Smoke
    • Bacteria
    • Very Fine Dust
    • Odor
    Particle size Effectiveness
    Large > 85%
    Medium 65 - 80%
    Small -
  • Ultimate

    MERV 13

    • Lint Dust
    • Pet Dander
    • Mold Spores
    • Pollen
    • Dust Mites
    • Fine Dust
    • Auto Emissions
    • Smoke
    • Tobacco Smoke
    • Bacteria
    • Very Fine Dust
    • Odor
    Particle size Effectiveness
    Large > 90%
    Medium > 90%
    Small < 75%

20 x 20 x 1 Air & Furnace Filter Replacements

The 20x20x1 universal air filter by Tier1 comes in a vast array of filtration levels identified by their unique merv rating. Merv types include merv 6 (basic), merv 8 (advanced), merv 11 (premium) and merv 13 (ultimate). Each merv type is categorized by the type of media used in the furnace filter’s construction, the type of pollutants it captures, and ultimately the amount of filtration it provides. Whether you are allergic to pet dander and dust mites or simply want to make sure there are less bacteria or pollen in your air, we have the air filters that fit your needs and budget.