Filtrete - 23 in. W X 23 in. H X 1 in. D Polypropylene 1000 MPR Pleated Allergen Air Filter 1 pk

This 17.5x23.5x1 Micro Allergen Defense filter in Filtrete’s 1000 MPR (MERV 11) tier uses electrostatically charged polypropylene media with 3‑in‑1 technology to pull in and trap countless microparticles, including pet dander, smoke, smog, and fine dust, while also capturing larger particles like lint, pollen, household dust, mold spores, and dust‑mite debris as air passes through.

Air circulation in central systems constantly carries fine allergens back to the return, where this pleated panel is designed to intercept them. In the 1000 MPR (MERV 11) performance tier, the 20x24x1 Micro Allergen Defense filter uses electrostatically charged polypropylene media to capture a broader mix of particles than basic dust filters, including household dust.

Built for large residential returns, this 24 x 24 x 1-inch Filtrete Allergen Defense filter uses pleated electrostatic media with 3‑in‑1 technology to clean recirculated air in your furnace or central AC system. With a 1000 MPR (MERV 11) rating, it is engineered to attract and capture microscopic particles like pet dander, smoke, and smog, along with larger allergens such as lint, household dust, pollen, and mold spores.