DuraChimney II Chase Top Collars are designed for constructing custom-sized chase tops while maintaining the proper ventilation and required clearance for safe operation. These collars ensure the necessary spacing to uphold the UL listing of your DuraChimney II system, helping protect both the chimney and surrounding structure. Ideal for custom installations, they support code compliance and long-term performance.
Additional Durachimney II Info:
DuraChimney II offers a high-performance, factory-built alternative to traditional masonry chimneys. Its unitized, lightweight construction eliminates the need for field assembly of pipe sections, making installation faster and more efficient. Engineered with a double-wall, air-cooled design, DuraChimney II stays cool on the outside while maintaining a strong, hot draft on the inside. This fire-safe system is built to protect both the chimney and the structure. It allows for thermal expansion in all directions under high heat and is tested to UL 103 standards—approved for continuous operation at 1000°F, one hour at 1400°F, and ten minutes at 1700°F.
