• Used with Honeywell 16x25 F100 and F200 Media Air Cleaners • Efficiency ratings are based on American Society of Heating, Refrigerating and Air-Conditioning Engineers Standard 52.2-1999.,Efficiency ranges are defined for small particles, E1=0.3 to 1.0 microns; medium particles, E2=1.0 to 3.0 microns; and large part • Minimum Efficiency Reporting Value: 11 • Static Pressure Drop (in. w.c.): 0.23 at 500 FPM • Filter Size: 16" x 25" x 4"