Chim-A-Lator Damper Size(in) Fits OUTSIDE Flue Widths of(in) Fits OUTSIDE Flue Lengths of(in) Lid Overhang(in) Total Height of Damper(in)
8 x 8 7 - 9 1/4 7 - 9 1/4 2 1/2 10
8 x 13 7 - 9 1/4 11 - 13 1/2 2 1/2 10
8 x 18 7 - 9 1/4 16 - 18 1/4 2 1/2 10
8 x 20 7 - 9 1/4 18 - 20 1/4 2 1/2 10
10 x 18 8 - 10 1/4 16 - 18 1/4 2 1/2 10
12 x 12 10 - 12 1/4 10 - 12 1/4 2 1/2 10
13 x 13 11 - 13 1/2 11 - 13 1/2 2 1/2 10
12 x 16 10 - 12 1/4 14 - 16 1/4 2 1/2 10
13 x 18 11 - 13 1/2 16 - 18 1/4 2 1/2 10
13 x 21 11 - 13 1/2 19 1/2 - 22 2 1/2 10
16 x 16 14 - 16 1/4 16 - 16 1/4 2 1/2 10
16 x 20 14 - 16 1/4 18 - 20 1/4 2 1/2 10
18 x 18 16 - 18 1/4 16 - 18 1/4 2 1/2 10
18 x 21 16 - 18 1/4 19 1/2 - 22 2 1/2 10
20 x 20 18 - 20 1/4 18 - 20 1/4 2 1/2 10
20 x 24 18 - 20 1/4 22 - 24 1/4 2 1/2 10
24 x 24 22 - 24 1/4 22 - 24 1/4 2 1/2 10