DuraVent DuraTech 8" Inner Diameter All-Fuel Stainless Steel Chimney Pipe with Galvalume Outer Wall - 48" Length: A venting pipe with an inner diameter of 8" is required for this unit. A double-wall chimney with a layer of ceramic refractory blanket is used in the DuraTech chimney system. The inner wall is 0.020" stainless steel, with a 0.02" galvalume exterior wall. This UL-listed design has an 8" inner diameter and a 10" outside diameter, with a 2" clearance to combustibles. Twist-lock connections secure the parts. A limited lifetime warranty is included.

48 Inch length Double-wall chimney pipe for wood oil coal and gas appliances .021" galvalume outer wall and .020" stainless steel inner wall Insulated by a layer of ceramic refractory blanket Secure twist-lock connections 2" clearance to combustibles 8" inner diameter with a 10" outer diameter Limited lifetime warranty UL Listed