20x24x4 MERV 11, MPR 1000 Pleated AC Furnace 4" Air Filters by Pamlico. 3 Pack. Actual Size: 19-3/8 x 23-3/8 x 3-3/4

The 20x24x4 MERV 11 air filter is designed to be a highly efficient filter to trap and hold allergens, pollen, and other particles while maintaining a low pressure drop. These filters provide a more efficient and effective filtration application for your HVAC system than standard pleated air filters assuring overall outstanding performance. These filters have a MERV 11 rating per ASHRAE Test Standards of 52.2. Applications where these filters are most suitable include residential, commercial office buildings, hospital settings, laboratories, and a wide array of other industrial facilities where maintenance personnel or homeowners require an increased level of cleaner air quality. The filter is constructed with a sturdy water-resistant beverage board frame with wire supported media. The MERV 11, MPR 1000, FPR 8 rated filter is composed of an electrostatic blend of synthetic fibers allowing for optimal air filtration making this an ideal filter for your facilities requirements. All filters are made in the USA.