High Capacity Pleated Filter Nominal Filter Size 12x18x1 Nominal Height 12 In. Nominal Width 18 In. Nominal Depth 1 In. MERV 8 Frame Type Moisture Resistant Die Cut Chipboard Nominal Pleat 0.4 High Velocity 500 fpm High Initial Resistance 0.24 In.WC Final Recommended Resistance 1.0 In.WC Max Velocity 500 fpm Media Area 3.5 sq. ft. Max Temp 180 Degrees F Pleats per Linear Feet 15 Standards UL 900 Classified Actual Height 11-1/2 In. Actual Width 17-1/2 In. Actual Depth 3/4 In.