{"product_id":"atco-rubber-products-13102520-r8-flex-duct-20in-x-25ft","title":"Atco Rubber Products 13102520 R8 Flex Duct 20in X 25ft","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ATCO RUBBER PRODUCTS 13102520 is a 20-inch diameter, 25-foot insulated flexible air duct rated R8, designed for low-to-medium pressure HVAC distribution systems. The inner core is constructed from a double-lamination of polyester film encapsulating a steel wire helix, forming an air-tight passage built to handle airflow up to 5000 feet per minute. Multiple layers of fiberglass insulation surround the core, and a tri-directional fiberglass scrim reinforced metallized polyester outer jacket provides a rugged, moisture-resistant finish. This duct is UL 181, Class 1 listed and complies with NFPA 90A and 90B, IMC, IRC, and UMC standards. Licensed HVAC contractors install this product in residential and light commercial forced-air systems where high thermal efficiency and code compliance are required.\u003c\/p\u003e\n\u003cp\u003eThis flex duct is suited for supply-side air distribution in residential and commercial HVAC applications where large-diameter runs are needed, such as main trunk branch connections or high-volume zone feeds. The 20-inch inside diameter accommodates significant airflow demand. Its R8 insulation rating makes it appropriate for unconditioned spaces such as attics, crawlspaces, and mechanical rooms where thermal loss must be minimized. Approvals include acceptance by the cities of Chicago, New York, and San Francisco, the County of Dade in Florida, and HUD, making it a strong choice for projects requiring multi-jurisdictional compliance.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eR8 insulation rating for high thermal performance in unconditioned spaces\u003c\/li\u003e\n  \u003cli\u003eDouble-ply polyester inner core with steel wire helix for an air-tight, pressure-resistant passage\u003c\/li\u003e\n  \u003cli\u003eTri-directional fiberglass scrim reinforced metallized polyester outer jacket for durability and vapor control\u003c\/li\u003e\n  \u003cli\u003eMaximum airflow rated at 5000 feet per minute\u003c\/li\u003e\n  \u003cli\u003eMaximum operating temperature of 250 degrees F; operating range from -20 degrees F to 140 degrees F\u003c\/li\u003e\n  \u003cli\u003eFlame Spread rating of 25 max and Smoke Developed rating of 50 max per UL 181 Class 1\u003c\/li\u003e\n  \u003cli\u003eVapor transmission of 0.05 perms for effective moisture resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eUL 181 Class 1 listed and compliant with NFPA 90A and 90B, IMC, IRC, UMC, and ICC ES Report No. ESR-1268. Accepted for use in jurisdictions including the cities of Chicago, New York, and San Francisco, the County of Dade in Florida, and HUD-regulated construction. Designed as a large-diameter insulated flex duct for residential and commercial forced-air HVAC distribution systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation must be performed by a licensed HVAC contractor in accordance with applicable mechanical codes including IMC, IRC, and local authority having jurisdiction requirements. Power down and lock out the air handling unit before making duct connections. Secure duct ends with approved draw bands and mastic or UL 181B-listed tape — do not use standard cloth duct tape. Avoid sharp bends that exceed the manufacturer's minimum bend radius, as excessive kinking reduces airflow and can compromise the inner core.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter\u003c\/strong\u003e: 20 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlex Length\u003c\/strong\u003e: 25 feet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR-Value\u003c\/strong\u003e: R8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Airflow\u003c\/strong\u003e: 5000 FPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Pressure (4 to 12 inch diameter)\u003c\/strong\u003e: 6 inches W.G. positive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Pressure (14 to 20 inch diameter)\u003c\/strong\u003e: 4 inches W.G. positive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNegative Pressure Rating (all diameters)\u003c\/strong\u003e: 3\/4 inch W.G.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Temperature\u003c\/strong\u003e: 250 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature Range\u003c\/strong\u003e: -20 degrees F to 140 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlame Spread\u003c\/strong\u003e: 25 max\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmoke Developed\u003c\/strong\u003e: 50 max\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVapor Transmission\u003c\/strong\u003e: 0.05 perms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Core Material\u003c\/strong\u003e: Double-ply polyester with steel wire helix\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJacket Material\u003c\/strong\u003e: Fiberglass scrim reinforced metallized polyester\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJacket Color\u003c\/strong\u003e: Silver\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 32 inches L x 24 inches W x 24 inches H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 53.26 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertifications\u003c\/strong\u003e: UL 181 Class 1, NFPA 90A and 90B, IMC, IRC, UMC, ICC ES Report No. ESR-1268, HUD\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e: USA\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: ATCO RUBBER PRODUCTS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 13102520\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ATCO RUBBER PRODUCTS","offers":[{"title":"Default Title","offer_id":51267951722802,"sku":"13102520","price":316.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308911792.webp?v=1780695386","url":"https:\/\/voomisupply.com\/products\/atco-rubber-products-13102520-r8-flex-duct-20in-x-25ft","provider":"Voomi Supply","version":"1.0","type":"link"}