16x20x4 MERV 11 Pleated AC Furnace Air Filters. 4 Pack (Actual Depth: 3-3/4")

MERV 11 Specifications: Actual Size: 15-1/2 x 19-1/2 x 3-3/4. Manufactured for system applications requiring high efficiency, non-shedding filtration media. Effectively reduces pollen, dust, pet dander, mold spores, dust mites, bacteria, smoke, smog, and other allergens from the air in your home or business. Supercharged electrostatically enhanced media. Specifically manufactured for system applications requiring improved medium efficiency, non-shedding filtration media. MERV 11 (Minimum Efficiency Reporting Value) based on ASHRAE Test Standard 52.2-2012 Synthetic media is made up of continuous hydrophobic fibers which do not absorb moisture and can withstand turbulent high-velocity conditions. Pleat configuration: Formed into aerodynamic, semi-tapered, wedge-shaped pleats expanding its capability to capture contaminants. Suggested to change at least every 3 Months Made in the United States