Pleated Air Filter Nominal Filter Size 18x24x1 Nominal Height 18 In. Nominal Width 24 In. Nominal Depth 1 In. MERV 8 Frame Type Moisture Resistant Die Cut Chipboard Frame Included Yes High Capacity Pleated Filter Media Material Synthetic Filter Efficiency 40 Percent High Velocity 500 fpm High Initial Resistance 0.24 In.WC Final Recommended Resistance 1.0 In.WC Max Velocity 500 fpm Media Area 5.7 sq. ft. Max Temp 150 Degrees F Pleats per Linear Foot 15