DuraVent DuraTech 5" x 11" Black Square Ceiling Support Box h18.88 51 lbs Warranty 1 yr

51 lbs Warranty 1 yr limited PROP 65 Yes Warranty

PolyPro Flex: PolyPro double-wall flex lining system

simulating burning logs

98 g/hr Average CO 1

79 Orifice - Front 2

DuraVent DuraTech 5" x 11" Black Square Ceiling Support Box h18.88 51 lbs Warranty 1 yrWith a Thermal Tech blanket 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. DuraTechs sleek 1" wall design provides for easy installations through 16" on