FiltersFast Compatible Replacement for Honeywell FC100A1003 MERV 8 Comp. Filter 16" x 20" x 4-3/8" (Actual Size: 15-7/8" x 19 7/8" x 4-3/8") Honeywell FC100A1003 MERV 8 Filter - 16" x 20" x 5" Dimensions: 16" x 20" x 4-3/8" (Actual Size: 15-7/8" x 19 7/8" x 4-3/8") Filter Life: 12 Months (depending on usage and air quality) MERV Rating: MERV 8 Made in the USA!