The Filtrete, 20 x 20" x 4", Allergen Reduction Filter, 3 Month Filter, For Housing Units Accommodating 4" Nominal Size Filters & Is For Residential Use, Electrostatically Charged, Attracts & Captures Particles Like Pollen, Mold Spores, & Dust Mite Debris, MPR Rating 1550, Last Up To 12 Months.
Customer Reviews for 3M Filtrete 20 x 20 x 4-In. Allergen Reduction Pleated Furnace Filter, Must Be Purchased In Quantities of 4
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