Dura-Vent’s product lines, DuraChimney II, is an exceptional factory-built alternative to prefabricated masonry chimneys. DuraChimney II is a unitized, lightweight design that eliminates the need for field assembly of pipe sections, allowing for faster installation. With 10-, 12-, 14- and 16-inch diameters, DuraChimney II covers a wide range of large-size fireplace installations, eliminating the need for multiple flues. DuraChimney II is listed to UL 103 and ULC S604 standards for use on masonry fireplaces that burn wood, oil, coal or gas. Contact: (800) 835-4429 or www.duravent.com.