Econo Minipleat Filter, 24x20x4, MERV 11

Mini-Pleat Air Filter, Filter Efficiency 65 Percent, MERV 11, Nominal Height 20 In., Nominal Width 24 In., Nominal Depth 4 In., Air Flow 500 fpm, Initial Resistance 0.27 In. WC, Final Resistance 1.5 In. WC, Filter Pack Enclosure Beverage Board Frame, Max. Air Flow 1920 cfm, Media Area 44 sq. ft., Max. Temp. 150 Degrees F, Nominal Pleat 65 Percent, Standards UL 900. Only shipped in quantities of 3.