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A 1‑inch pleated electrostatic HVAC filter using Filtrete’s exclusive 3‑in‑1 technology to reduce airborne particles. Rated MPR 800 and MERV 10, it captures both large particles (like lint, dust, pollen, pet dander) and fine microparticles such as smoke, smog, dust mite debris. Suitable for furnace and HVAC systems; recommended replacement every ~90 days