4-Inch Ultra Efficiency Air Cleaner Filter
Brand: Honeywell
Actual dimensions (inches): 15.90 x 19.75 x 4.38
Nominal dimensions (inches): 16x20x4
MERV 12 rating-up to 60x more efficient than typical 1" fiber glass filter
Easily fits Aprilaire/Space-Gard models 2200 & 2254
Lasts up to 12 months