FC100A1003 is the correct replacement filter for the following air cleaner models: •Honeywell F100F1004 •Honeywell F100B1008 •Honeywell F150E1000 •Honeywell F100F2028 •Honeywell F25 series •Honeywell F35 series •Honeywell F100 series •Honeywell F150 series The replacement filter FC100A1003 Media Air Filter can be used with Honeywell Air Cleaners including the Honeywell F100F1004, F100B1008, F150E1000, F100F2028 Honeywell FC100A1003 specifications: •Nominal Size: 16" x 20" x 4 3/8" •Actual Size: 15 7/8" x 19 7/8" x 4 3/8" •MERV 11 rating •Captures 96% of particles 3 to 10 microns in size •Updated MERV 11 framing •Replaces FC35A1035 / 209894 •Fits Honeywell Series: F25, F35, F100, and F150