16x28x6 (15.38x26.94x6) MERV 13 Aftermarket Lennox Replacement Filter (2 Pack) Fits Lennox model number PMAC12-C Nominal size 16 x 28 x 6 box type filter. Actual size (H) 15 3/8 x (W) 26 15/16 x (D) 6 . Package contains 2 filters. This is an aftermarket filter.