The 3M Filtrete 1500 MPR (Microparticle Performance Rating) HVAC Air Filter is a high-performance 4-inch thick filter designed to capture allergens, bacteria, and viruses from the air in your home. Rated MPR 1500 (equivalent to MERV 12), it uses electrostatically charged fibers to attract and capture microscopic particles as small as 0.3 to 1 micron, including dust, lint, pollen, pet dander, mold spores, smoke particles, bacteria, and some viruses.

The 4-inch depth (20 x 25 x 4 inches) provides a larger filter surface area and extended filter life compared to standard 1-inch filters, making it ideal for whole-home HVAC systems, furnaces, and air handlers. This Costco pack includes 2 filters, offering excellent value for routine seasonal filter replacement. Compatible with most standard residential HVAC systems that accept 4-inch media filters.