{"product_id":"thermaflex-52307000002-flexible-air-duct-7in-x-25ft-r8","title":"Thermaflex 52307000002 Flexible Air Duct 7in X 25ft R8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe THERMAFLEX 52307000002 is a 7-inch diameter, 25-foot length insulated flexible air duct rated at R-8, designed for low to medium pressure HVAC distribution systems. The inner core is a heavy-gauge, corrosion-resistant steel wire helix laminated with a strong polyester film, forming a durable inner liner. Over that core sits a thick blanket of fiberglass insulation wrapped in a fiberglass scrim. The outer jacket is a durable black polyethylene vapor barrier that resists moisture infiltration. Licensed HVAC technicians and sheet metal contractors install this product in residential and light commercial air distribution applications.\u003c\/p\u003e\n\u003cp\u003eThis flexible duct is suited for supply and return air distribution in residential and light commercial forced-air systems. The 7-inch inside diameter and 25-foot coil length make it a practical choice for branch runs from plenum boxes, flex-duct transitions, and trunk-line takeoffs. The R-8 insulation value exceeds the minimum requirements of most energy codes, making it appropriate for unconditioned attic, crawlspace, and mechanical room installations where thermal performance is a priority.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eR-8 fiberglass insulation blanket for high thermal performance in unconditioned spaces\u003c\/li\u003e\n  \u003cli\u003eCorrosion-resistant steel wire helix inner core for shape retention and crush resistance\u003c\/li\u003e\n  \u003cli\u003ePolyester film inner liner laminated to the wire helix for a smooth, durable airflow surface\u003c\/li\u003e\n  \u003cli\u003eDurable black polyethylene outer jacket serves as an integrated vapor barrier\u003c\/li\u003e\n  \u003cli\u003eRated for low to medium pressure systems with a maximum positive pressure of 10 inches WG (for 4-inch to 16-inch ID) and negative pressure of 0.5 inches WG\u003c\/li\u003e\n  \u003cli\u003eWide operating temperature range of -20 degrees F to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003e5-year manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for low to medium pressure residential and light commercial forced-air HVAC distribution systems. Compatible with standard 7-inch round duct fittings, collars, and takeoff boots used in typical sheet metal and flex-duct installations.\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. Shut down the air handler and confirm the system is depressurized before making duct connections. Support the duct at maximum 5-foot intervals to prevent sagging, which reduces airflow efficiency. Avoid sharp bends smaller than the duct diameter, as kinked flex duct significantly increases static pressure and reduces system performance.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter Range (Product Line)\u003c\/strong\u003e: 4 to 20 inches ID\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePositive Pressure Rating\u003c\/strong\u003e: 10 inches WG (4-inch to 16-inch ID); 6 inches WG (18-inch to 20-inch ID)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNegative Pressure Rating\u003c\/strong\u003e: 0.5 inches WG (4-inch to 20-inch ID)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Velocity\u003c\/strong\u003e: 5000 FPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature Range\u003c\/strong\u003e: -20 degrees F to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Core\u003c\/strong\u003e: Polyester film laminated over corrosion-resistant steel wire helix\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsulation Material\u003c\/strong\u003e: Fiberglass with fiberglass scrim\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Jacket\u003c\/strong\u003e: Black polyethylene vapor barrier\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR-Value Options (Product Line)\u003c\/strong\u003e: R-4.2, R-6, R-8\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: 52307000002\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"THERMAFLEX","offers":[{"title":"Default Title","offer_id":51620584489266,"sku":"052307000002","price":85.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e4b7c16c802f70fba98d99eee5af1f50.webp?v=1787344234","url":"https:\/\/voomisupply.com\/products\/thermaflex-52307000002-flexible-air-duct-7in-x-25ft-r8","provider":"Voomi Supply","version":"1.0","type":"link"}