{"product_id":"thermaflex-56307000001-flex-duct-7-in-x-25-ft-r8-insulated","title":"Thermaflex 56307000001 Flex Duct 7 in X 25 Ft R8 Insulated","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe THERMAFLEX 56307000001 is a KM R8 insulated flexible air duct designed for low-to-medium pressure HVAC distribution systems. The inner core is a smooth, airtight polyester film laminated over a heavy corrosion-resistant steel wire helix, providing structural support and consistent airflow. Surrounding the inner core is a thick fiberglass insulation blanket rated at R-8.0, which reduces heat gain and loss in unconditioned spaces. The outer vapor barrier is a bi-directional, reinforced metallized film that resists unraveling and moisture infiltration. This duct ships in a 7-inch diameter by 25-foot length and is installed by licensed HVAC technicians in residential and light commercial ducted air systems.\u003c\/p\u003e\n\u003cp\u003eThis flexible duct is suited for supply air distribution runs in residential and light commercial forced-air systems, including installations in attics, crawl spaces, and mechanical rooms where thermal performance and vapor barrier integrity are required. The R-8.0 insulation value meets or exceeds energy code requirements in most jurisdictions for ducts located outside conditioned building envelopes. It handles velocities up to 5,000 feet per minute and temperatures from -20 degrees F to 250 degrees F, making it appropriate for both heating and cooling applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eR-8.0 fiberglass insulation blanket reduces heat transfer in unconditioned spaces\u003c\/li\u003e\n  \u003cli\u003eSmooth airtight polyester inner core promotes low-resistance airflow and reduces turbulence\u003c\/li\u003e\n  \u003cli\u003eCorrosion-resistant steel wire helix maintains duct shape under positive and negative pressure\u003c\/li\u003e\n  \u003cli\u003eBi-directional reinforced metallized outer vapor barrier resists unraveling and moisture infiltration\u003c\/li\u003e\n  \u003cli\u003eRated for velocities up to 5,000 FPM across low-to-medium pressure systems\u003c\/li\u003e\n  \u003cli\u003eBacked by a 5-year manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation flexible duct for residential and light commercial forced-air HVAC systems requiring a 7-inch diameter insulated supply duct with an R-8.0 rating.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician in accordance with SMACNA flexible duct installation standards and applicable local mechanical codes. Power down the air handling unit and verify the system is depressurized before making duct connections. Avoid sharp bends, compression, or over-extension of the duct, as these conditions significantly reduce system airflow and duct performance. Secure both inner liner and outer jacket independently at each connection point using approved clamps and mastic or UL-listed tape.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 7 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 25 feet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR-Value\u003c\/strong\u003e: R-8.0\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Rating (Positive)\u003c\/strong\u003e: 10 inches WG (4-16 inch ID), 6 inches WG (18-20 inch ID)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Rating (Negative)\u003c\/strong\u003e: 0.5 inches WG (4-20 inch ID)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Velocity\u003c\/strong\u003e: 5,000 FPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Range\u003c\/strong\u003e: -20 degrees F to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Core Material\u003c\/strong\u003e: Polyester film over steel wire helix\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsulation Material\u003c\/strong\u003e: Fiberglass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Jacket\u003c\/strong\u003e: Bi-directional reinforced metallized vapor barrier\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e: 5 years\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: THERMAFLEX\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 56307000001\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"THERMAFLEX","offers":[{"title":"Default Title","offer_id":51621069029682,"sku":"056307000001","price":79.74,"currency_code":"USD","in_stock":false}],"url":"https:\/\/voomisupply.com\/products\/thermaflex-56307000001-flex-duct-7-in-x-25-ft-r8-insulated","provider":"Voomi Supply","version":"1.0","type":"link"}