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 1900 Ultimate Allergen Healthy Living Filter - 18x18x1 (6-Pack)
$148.99MSRP: $151.34 Save 2%