Chimney has been filling the supply and accessory needs of over 8,000 chimney sweeps hearth retailers masons and contractors for over 25 years, Chimney has the privilege of serving over 80% of the chimney professionals in America, Founded by Robert Daniels ""Sooty Bob "" in 1978 Chimney has grown from a one-man operation to a national network of six warehouses and a manufacturing plant, From its headquarters in Fairfield Iowa Chimney plays a major role in providing for the Chimney industry, There are quite a few direct vent systems available for gas appliances, but not many of them are also capable of venting modern corn and pellet-fueled devices, This Direct-Temp Black Vent Pipe, part of Selkirk"s newest direct vent line, can efficiently vent corn, pellet, and gas heating appliances, And that means you can be prepared for almost any type of installation just by stocking one type of pipe, Direct-Temp pipes aren"t just convenient, Their economical dual construction allows the inner chamber to safely vent exhaust fumes while the outer section brings in fresh air for combustion, making it possible for you to use one pipe where you used to need two, Obviously this speeds up installation, but, even more impressively, the close proximity of the exhaust to the incoming air vent also enhances efficiency by providing preheated oxygen for combustion, Homeowners will also like the sleek black steel construction and lifetime warranty, Selkirk"s Direct-Temp Black Vent Pipe, like other products in this innovative line, is durable, easy to use, and, above all, effective, That is why both customers and service professionals will find this pipe perfect for all of their gas, corn, and pellet venting needs, Efficiently vents gas, corn, and pellet direct vent appliances, Single pipe provides vents exhaust and brings in combustion air, Heavy-duty galvanized steel outer wall, 304 alloy stainless steel inner wall resists corrosion, Leak-proof silicone and fiberglass connections, Rivet and weld-free outer profile with sleek black finish, 1"" clearance to combustibles, Gasket joints require no sealant, 4"" inner diameter with 6 5/8"" outer diameter, 36"" length, Lifetime warranty, SKU: CPPF5752