{"product_id":"quietflex-5km-flex-duct-5in-r-4-2-foil-jacket-25ft","title":"Quietflex 5KM Flex Duct 5in R-4.2 Foil Jacket 25ft","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe QUIETFLEX 5KM is a flexible air distribution duct designed for branch and takeoff applications in residential and light commercial HVAC systems. The duct measures 5 inches in diameter and carries an R-4.2 insulation value, making it suitable for moderately conditioned spaces where heat gain and condensation control are required. A foil jacket wraps the insulated core, providing durability against puncture and vapor intrusion during and after installation. Each length runs 25 feet, giving HVAC technicians enough material to handle most single-room supply runs without splicing. The combination of insulation rating, foil outer layer, and flexible core makes this duct a standard choice for connecting supply plenums to ceiling and wall diffusers.\u003c\/p\u003e\u003cp\u003eThis duct is used in supply-side air distribution for forced-air systems in residential construction and light commercial retrofit work. It is well suited for routing from metal trunk lines or air handlers to individual room diffusers, registers, and grilles. The 5-inch diameter is a common size for low-CFM branch runs serving individual zones or rooms. Licensed HVAC contractors and sheet metal workers install this duct during new construction and system upgrades where flexible routing is needed to navigate framing, joists, and other structural obstacles.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eR-4.2 insulation value for moderate thermal and condensation control\u003c\/li\u003e\n\u003cli\u003e5-inch diameter fits standard branch and takeoff collars\u003c\/li\u003e\n\u003cli\u003eFoil jacket provides vapor resistance and puncture durability\u003c\/li\u003e\n\u003cli\u003e25-foot length accommodates most single-room supply runs\u003c\/li\u003e\n\u003cli\u003eFlexible core allows routing around framing and structural obstructions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard installation duct for 5-inch branch connections in residential and light commercial forced-air HVAC systems.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed HVAC technician or sheet metal contractor in accordance with SMACNA flexible duct installation standards and local mechanical codes. Power down the air handler and close the system before connecting or disconnecting duct sections. Secure each end with an approved draw band or clamp and mastic or metal tape rated for duct use — never use standard cloth duct tape. Avoid sharp bends and excessive compression of the duct core, as both significantly reduce airflow and system efficiency.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulation R-Value\u003c\/strong\u003e: R-4.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJacket Type\u003c\/strong\u003e: Foil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 25 feet\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: QUIETFLEX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5KM\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QUIETFLEX","offers":[{"title":"Default Title","offer_id":51344018735410,"sku":"5KM","price":72.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310552882.jpg?v=1782027068","url":"https:\/\/voomisupply.com\/products\/quietflex-5km-flex-duct-5in-r-4-2-foil-jacket-25ft","provider":"Voomi Supply","version":"1.0","type":"link"}