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QuietFlex Duct 4 in x 25 ft Insulated Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. The duct has R6 insulation which contains 33% more insulation than the standard R4.2 product. This additional insulation provides greater thermal efficiency to save energy. The product is also covered in a heavy duty, silver jacket for durability. The duct is ETL listed, meeting the UL181 standard.
|Thermal Resistance (R-Value) :||R6|
|Jacket Color :||Silver|
|Internal Diameter :||4 in|
|Length :||25 feet|