High Form Damper Used in the construction of single opening fireplaces. Optional rotary damper control available in models 34 thru 42. Installation Instruction Sheet PDF file, 311 KB Model No. Firebox Opening Overall Dimensions Width Height Width Depth Height 1224 24-26 24-27 24 10 14.5 1230 27-32 24-27 29 10 14.5 1236 33-38 24-30 25 10 14.5 1242 39-43 27-32 41 10 14.5 1248 44-51 27-36 47 10 14.5 1254 52-57 30-42 54 11 19.5 1260 58-64 30-42 60 11 19.5 1272 65-74 30-48 72 11 19.5
