The Koch Multi-Pleat XL8™ is a medium efficiency extended surface pleated panel filter, engineered to provide higher initial efficiencies and overall superior performance than standard pleated filters. The Multi-Pleat XL8™ carries a MERV 8 and MERV-A 8 performance rating in accordance with ASHRAE Test Standard 52.2-2007. The MERV 8 and MERV-A 8 performance rating provided by the Multi-Pleat XL8™ make the filter an excellent upgrade from disposable filters and standard MERV 6 and 7 rated pleated filters. The Multi-Pleat XL8™ is the best selection in applications such as hospitals, laboratories, pharmaceutical plants, commercial office buildings, and in any system in which a higher degree of indoor air quality is required. Koch™ by Trion® Pleated Air Filter, Standard Capacity, Series: Multi-Pleat XL8™, 20 in Width, 4 in Depth, 20 in Height, MERV: 8, 840 to 1740 cfm, 200 deg F, 0.09 in wg Initial Resistance, 1 in WG Final Resistance, Synthetic Media, Domestic