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MERV Rated Replacement Air Filter: AIRx Filters 12x20x1 (Actual: 11.50 x 19.50 x 0.75 in) MERV 11 air filter assures the effectiveness of your home HVAC system resulting to efficient heating, ventilation and air conditioning | Contaminant Reducing Replacement Air Filter: AIRx Filters 12x20x1 air filter replacement (Actual: 11.50 x 19.50 x 0.75 in) traps 1.0 - 10.0 micron of particles such as lint, dust, pollen, dust mite debris, mold spores, pet dander, smoke, and smog | High Quality Air Filter Replacement Material: AIRx Filters 12x20x1 (Actual: 11.50 x 19.50 x 0.75 in) air filters are 100% made in the USA using high quality air filter moisture resistant double-wall beverage board | Superior Air Filter Replacement Construction And Specs: AIRx Filters 12x20x1 air filter uses electrostatically charged 100% synthetic gradient media can perform at temperature ranging from 180F (82C) continuous service, peak 225F (107C) | Multi-Pack OEM Air Filter Replacement Compatible: AIRx Filters 12x20x1 MERV11 air filter can replace and/or comparable with Allergen Defense MPR 1000 1085 1200, Odor Reduction MPR 1200 12x20x1 air filter

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