Filtrete - 20 in. W X 36 in. H X 1 in. D 1000 MPR Pleated Allergen Air Filter 1 pk

Sized for smaller returns, this 12 x 20 x 1-inch Filtrete Allergen Defense filter is made with synthetic pleated media to help clean recirculated air in residential HVAC systems. With Filtrete 3‑in‑1 technology and a 1000 MPR (MERV 11) rating, it attracts and traps microscopic particles like smoke and smog along with larger allergens such as lint, household dust, pollen, mold spores, pet dander, and dust mite debris.

Designed for homes that want added allergen reduction, this pleated air filter works with your central HVAC system to help clean the air every time it runs. Its electrostatically charged synthetic media is rated at 1000 MPR (about MERV 11), allowing it to capture many fine particles such as pet dander, smoke, and smog, plus common allergens including lint, household dust, pollen, mold spores, and dust‑mite debris.

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.