DuraVent DuraTech 6" Chimney Cap indoor-heaters Why is the BTU according

Why is the BTU according to EPA test data smaller than the one advertised

Anthracite Certification

Item Number 90218 UPC 898392002180 Color/Finish Teak Material Reclaimed Quality Teak and 304 Grade Polished Stainless Steel Product Line Gel Fuel Fireplace Type of Assembly Minimal Assembly Required Indoor/Outdoor Indoor/Outdoor Product Width 12" Product Depth 12" Product Height 51" Warranty

Model CHDS-24 Product Size 24" Compatible Burner G4

Ideal for Any Size Hearth

DuraVent DuraTech 6" Chimney Cap indoor-heaters Why is the BTU accordingWith 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