Master Flow 8 in x 25 Ft Flexible Duct R8 Heavy Duty Insulated Reflective Jacket
It features R8 insulation, which provides 50% more thermal protection than R4.2 ducts—helping improve energy efficiency and reduce heat loss. The heavy-duty silver jacket adds extra durability for long-lasting performance.
Everbilt 8 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket F8IFD8x300
Everbilt 8 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket. This 8 in. The duct has R8 insulation which contains 33% more insulation than the standard R8 product. The product is also covered in a heavy duty, silver jacket for durability.