DuraVent DuraTech 6" x 11" Black Square Ceiling Support Box burncrete-log High-efficiency heat exchange

High-efficiency heat exchange

meets the strictest building codes

Adds Mechanical Convection to Speed Room Heating

Charcoal (ZAX36CH)

69 cm Product Width 38

DuraVent DuraTech 6" x 11" Black Square Ceiling Support Box burncrete-log High-efficiency heat exchangeWith 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