Suggested Retail: $43.98. Filtrete 20x20x1 AC Furnace Air Filter MERV 11 MPR 1000 Micro Allergen Defense 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter 4 Pack. The Filtrete 20x20x1 MPR 1000 Air Filter, made by 3M, is designed to capture unwanted particles from your household air, contributing to a cleaner, fresher home environment. With exclusive Filtrete 3-in-1 technology, an MPR 1000 and MERV 11 rating, the filter pulls and captures microparticles such as pet dander, smoke, and smog, while allowing cleaner air to flow through. It also captures larger particles including lint, pollen, mold spores, and household dust. This pack contains four filters for use in your furnace, air conditioner, or HVAC system. For optimal performance, change your furnace filter at least every 90 days. Brand: Filtrete. Model: ‎9802-4. Num: oUkfz9E5Y93y0kD1Wnl0VU. Lot Sticker: OH001.04-00000012-19. 7 CALENDAR DAY FULL REFUND GUARANTEE (FROM PRIMARY PICKUP DATE) ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE (FROM PRIMARY PICKUP DATE) IS ALSO AVAILABLE. THE PRIMARY PICKUP DATE IS THE DAY AFTER THE AUCTION ENDS. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.