Other Options (SB60)

4" Uninsulated Flex Duct for Outside Air; Includes Two 42" (1065mm) Sections (UD4) 4" (100mm) Insulated Flex Duct for Outside Air - Two 42" (1065mm) Sections (ID4) Chimney Air Kit for SL1100 Series Pipe; SL400 required in Canada (CAK5A) Micore Hearth Extension for 42" Models; 66" x 20" x 1/2", 5 Pack (HX4M)