DuraVent DuraTech 16" Diameter Trim Collar for Round Support Box w15.5 *The key valve housing is

*The key valve housing is easily accessed from the side of the unit

000 31” Pan Kit 31" 24" 2 Rings 3/4" 275

18”-24” diameters are built to order and are not returnable

5DT-48 Part no

DuraVent DuraTech 16" Diameter Trim Collar for Round Support Box w15.5 *The key valve housing isWith a Refractory insulation encased between dual walls, DuraTech offers the optimum in safety and performance. It keeps the outer wall of the chimney cool while ensuring high flue gas temperatures for optimum draft performance. The inner wall is 25% thicker than competitive chimneys for an extra margin of safety. No locking bands or mechanical fasteners required. DuraTech's sleek 1" wall design provides for easy installations through 16" on center