DuraVent DuraTech 12" Inner Diameter All-Fuel Stainless Steel Chimney Pipe with Galvalume Outer Wall - 12" Length: A venting pipe with an inner diameter of 12" is required for this unit. Chimney pipes should be durable and convenient, allowing you to use them with a variety of applications, while ensuring that they will not be easily damaged. DuraTech's double-walled pipe features simple twist-lock connections for quick and easy installation. Only a 2" clearance is needed from combustibles making this an easy and efficient solution for creating a vent system even in tight spaces.

12 Inch length Double-wall chimney pipe for wood oil coal and gas appliances .029" galvalume outer wall and .027" stainless steel inner wall Insulated by a layer of ceramic refractory blanket Secure twist-lock connections 2" clearance to combustibles 12" inner diameter with a 14" outer diameter Limited lifetime warranty UL Listed