DuraVent DuraTech 8" x 12" Stainless Steel Double-Wall All-Fuel Chimney Pipe btu25250 Produces up to 5000 BTU

Produces up to 5000 BTU of heat

4 cm x D 30

How many Platinum gas heaters do I need

in this case burning red oak

Fills in extra space for mantel installation

DuraVent DuraTech 8" x 12" Stainless Steel Double-Wall All-Fuel Chimney Pipe btu25250 Produces up to 5000 BTUWith 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