3M Filtrete AC Furnace Air Filter 20x20x4 2-Pack

The 3M Filtrete AC Furnace Air Filter (20x20x4, 2-Pack) is designed for effective allergen defense and optimal air filtration. With an MPR 1000 and MERV 11 rating, it efficiently captures particles such as dust, pollen, and pet dander. This electrostatic filter is compatible with Honeywell units and fits standard AC and furnace systems. Ideal for home use, it helps maintain cleaner indoor air quality. Each pack includes two filters with an actual size of 19.88 x 19.88 x 4.31 inches.