{"product_id":"thermaflex-53814000002-flex-vent-insulated-flex-duct-14in-x-25ft-r-6","title":"Thermaflex 53814000002 Flex-vent Insulated Flex Duct 14in X 25ft R-6","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe THERMAFLEX 53814000002 is a 14-inch diameter, 25-foot section of KM Flex-Vent insulated flexible air duct rated at R-6. The inner core is a smooth, airtight polyester film laminated over a heavy-gauge, corrosion-resistant steel wire helix. This construction supports a thick blanket of fiberglass insulation wrapped around the inner core, then enclosed by a bi-directional reinforced metallized outer vapor barrier that resists unraveling. The assembly is engineered for low- to medium-pressure HVAC distribution systems. Licensed HVAC technicians and sheet metal contractors install this product in residential and light commercial forced-air systems.\u003c\/p\u003e\n\u003cp\u003eThis flexible duct is suited for supply and return air distribution in residential and light commercial HVAC installations. The 14-inch inner diameter accommodates high-volume trunk runs and large branch connections off main plenums or wye fittings. It performs across a temperature range of -20 degrees F to 250 degrees F, making it appropriate for both heating and cooling applications. Maximum rated velocity is 5,000 FPM, supporting high-flow system designs without exceeding the structural limits of the inner core.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eR-6 fiberglass insulation blanket reduces heat gain and loss along duct runs\u003c\/li\u003e\n  \u003cli\u003eSmooth airtight polyester inner core minimizes airflow resistance in low- to medium-pressure systems\u003c\/li\u003e\n  \u003cli\u003eCorrosion-resistant steel wire helix innercore maintains shape and resists collapse under negative pressure\u003c\/li\u003e\n  \u003cli\u003eBi-directional reinforced metallized outer vapor barrier prevents moisture intrusion and does not unravel\u003c\/li\u003e\n  \u003cli\u003eRated to 5,000 FPM air velocity for high-volume distribution runs\u003c\/li\u003e\n  \u003cli\u003eWide temperature range of -20 degrees F to 250 degrees F supports heating and cooling duty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style flexible duct section for residential and light commercial forced-air HVAC distribution systems requiring a 14-inch inner diameter connection with R-6 insulation performance.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician or sheet metal contractor in accordance with SMACNA flexible duct installation standards and applicable local mechanical codes. Power down and lock out the air handler or furnace before connecting or repositioning duct sections. Secure both ends with approved draw bands and mastic or UL 181B-listed tape — do not use standard cloth duct tape. Avoid sharp bends and excessive compression of the duct body, as either condition significantly reduces effective airflow and insulation performance.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Diameter\u003c\/strong\u003e: 14 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-6.0\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePositive Pressure Rating\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\u003eNegative Pressure Rating\u003c\/strong\u003e: 0.5 inches WG (4-20 inch ID)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Air 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 with 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\u003eAvailable Diameter Range\u003c\/strong\u003e: 4-20 inches ID\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable R-Values\u003c\/strong\u003e: R-4.2, R-6.0, R-8.0\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: 53814000002\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"THERMAFLEX","offers":[{"title":"Default Title","offer_id":51619538829618,"sku":"053814000002","price":147.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ba73609c661d3af6eda9ba9ebe4fabd3_679e70fe-56b6-4ce3-bcf6-9cc1e1fa398d.webp?v=1787331562","url":"https:\/\/voomisupply.com\/products\/thermaflex-53814000002-flex-vent-insulated-flex-duct-14in-x-25ft-r-6","provider":"Voomi Supply","version":"1.0","type":"link"}