High Capacity Pleated Filter Nominal Filter Size 28x30x4 Nominal Height 28 In. Nominal Width 30 In. Nominal Depth 4 In. MERV 8 Frame Type Moisture Resistant Die Cut Chipboard Nominal Pleat 0.4 High Velocity 625 fpm High Initial Resistance 0.29 In.WC Final Recommended Resistance 1.0 In.WC Max Velocity 625 fpm Media Area 42.3 sq. ft. Max Temp 180 Degrees F Pleats per Linear Feet 12 Standards UL 900 Classified Actual Height 27-3/8 In. Actual Width 29-3/8 In.