The support box is intended for use when installing chimney in an A-frame, in a mobile home or in a ceiling under a narrow section of roof. It provides a finished installation at the ceiling level and will support up to 20 ft of 6 in, 7 in or 8 in Dia chimney. The part also provides shielding from insulation when installed in an unoccupied attic space. The support box assembly is comprised of a black box designed for installation inside 16 in OC joists, a cylindrical shield, support bucket, ceiling trim and four screws.

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