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The Master Flow 4 in. x 25 ft. Insulated Flexible Duct R8 Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. The duct has R8 insulation which contains 50% 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.
|Assembled Depth (in.)||300 in||Assembled Height (in.)||8 in|
|Assembled Width (in.)||8 in||Product Diameter (in.)||4.0 in|
|Product Length (in.)||300 in|
|Maximum air flow (CFM)||30.0||R Value||8|
|Certifications and Listings||2-UL Recognized,ETL Listed|
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