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Review Details

3M Filtrete 20x25x4 Whole House Air Filter (4 inch, Allergen Reduction, 1-pack)

Average Customer Rating:

3M Filtrete 20x25x4 Whole House Air Filter (4 inch, Allergen Reduction, 1-pack)

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Rating

Product Review (submitted on May 22, 2011):

These filters seem to still allow air flow even when they are filthy - usually after about ten to twelve months in my old house.

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