Class A pipe is also known as Chimney Pipe or UL103 Pipe. Class A systems are used for high-temperature exhaust gases from common solid fuels such as: Wood, Coal, Oil, and other high-output fuels. This pipe is meant to be installed as a free-standing chimney system and can be connected to your stove or appliance without the need for an existing chimney. DuraChimney II is a double wall, air-cooled chimney system for use with masonry fireplaces which burn wood, oil, coal, or gas. DuraChimney II is designed to stay cool on the outside, to provide a hot draft on the inside and to provide a fire-safe design that protects both the chimney and the building. The double-wall, air-cooled designed allows the chimney it expand both radically and lengthwise under high temperatures.Use to Support and stabilize the chimney in interior or exterior installations to ensure a 2 clearance Wall straps are required every 8 clearance on the exterior of the building onlyCollection: DuraTech Fuel Type: Coal, Gas, Oil, Wood Height: 2 Inner Diameter: 14 Material: Galvanized Pipe Class: Class A Pipe Shape: Round Style: Functional Vent Construction: Double Wall Weight: 6 Width: 20