3 2 x 1 24 4 2 July 8, 2019 16 32 64 128 4 x 2 1 24 * 2 x 2 3 8 0 15 1 2 x 24 1 2 x 3 4 air filter 19 1 2 x 24 1 2 x 3 4 air filter 15 1 2 x 24 1 2 x 3 4 furnace filter 3 1/2 x 4
