MERV RATED REPLACEMENT AIR FILTER: AIRx Filters 20x30x1 (Actual: 19.63 x 29.63 x 0.75in) MERV MERV 13 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 20x30x1 air filter replacement (Actual: 19.63 x 29.63 x 0.75in) traps 1.0 - 3.0 micron of particles such as lint, dust, pollen, dust mite debris, mold spores, pet dander, smoke, smog, airborne bacteria HIGH QUALITY AIR FILTER REPLACEMENT MATERIAL: AIRx Filters 20x30x1 (Actual: 19.63 x 29.63 x 0.75in) 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 20x30x1 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 20x30x1 MERVMERV 13 air filter can replace and/or comparable with Allergen Defense, Clean Living, Healthy Living, Odor Reduction 20x30x1 air filter