18 x 18 x 1 Air Filters

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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  1. 18x18x1 Merv 8 Universal Air Filter By Tier1 (6-Pack)

    Price $52.99 List Price Price $75.99 Save 30%
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  2. 18x18x1 Merv 11 Universal Air Filter By Tier1 (6-Pack)

    Price $62.99 List Price Price $89.99 Save 30%
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  3. Filtrete 1900 Ultimate Allergen Healthy Living Filter - 18x18x1 (6-Pack)

    Price $148.99 List Price Price $151.34 Save 1%
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  4. Filtrete 600 Dust Reduction Clean Living Filter - 18x18x1 (6-Pack)

    Price $74.89 List Price Price $128.99 Save 41%
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  5. Filtrete 1500 Ultra Allergen Healthy Living Filter - 18x18x1 (6-Pack)

    Price $139.99 List Price Price $142.34 Save 1%
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  6. Filtrete 1000 Micro Allergen Defense Filter - 18x18x1 (6-Pack)

    Price $105.99 List Price Price $108.34 Save 2%
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