DuraVent DuraVent 8" Inner Diameter - DuraPlus Class A Chimney Pipe - Triple Wall - 18.25" Square Ceiling Support Box

DuraPlus Collection 8" x 24" Class A Chimney Pipe Square Ceiling Support BoxThe DuraPlus 8" x 24" Class A Chimney Pipe Square Ceiling Support Box is used with flat, vaulted, or cathedral ceilings. Square Ceiling Support Box is painted black. Refer to Ceiling Pitch table to determine size of support box needed. Supports up to 35’ of DuraPlus Chimney. Starter Section built in. Trim included.Features:Length: 18-1/4"Width: 14-1/4"Height: 24"Inner Diameter: 8"For DuraBlack Ceiling Pitch 5/12-9/12 Use This Sup...