{"product_id":"atco-031-r8_8x50ft-r8-flexible-air-duct-8-in-50-ft-class-1","title":"Atco 031-R8_8X50FT R8 Flexible Air Duct 8 in 50 Ft Class 1","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ATCO RUBBER PRODUCTS 031-R8_8X50FT is an R8-insulated, Class 1 flexible air duct designed for residential and commercial HVAC distribution systems. Measuring 8 inches in diameter and 50 feet in length, it delivers a maximum air velocity rating of 5000 FPM and handles up to 6 inches WG positive pressure per UL 181. The duct features an air-tight 2-ply polyester inner core that prevents fiberglass erosion into the airstream, a thick blanket fiberglass insulation layer for high thermal efficiency, and a tough silver metalized polyester outer jacket rated for tear and puncture resistance. Plain end terminations allow straightforward field connections. Licensed HVAC technicians and sheet metal mechanics are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis flexible duct is suited for supply-air branch runs in residential forced-air systems and light commercial HVAC applications where a Class 1, UL 181-listed product is required. The R8 insulation value meets or exceeds energy code requirements in most jurisdictions, making it appropriate for unconditioned attic, crawlspace, and plenum-adjacent installations. The encapsulated wire helix resists unraveling when the duct is cut to length, supporting faster installation in tight spaces. Compatible with standard round sheet metal collars and flex duct connectors in the 8-inch nominal size range.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eR8 thick blanket fiberglass insulation for superior thermal performance and energy efficiency\u003c\/li\u003e\n  \u003cli\u003eAir-tight 2-ply polyester inner core eliminates fiberglass erosion into the conditioned airstream\u003c\/li\u003e\n  \u003cli\u003eEncapsulated wire helix prevents unraveling when cut, enabling fast, clean field trimming\u003c\/li\u003e\n  \u003cli\u003eSilver metalized polyester jacket resists tearing and puncture for long service life\u003c\/li\u003e\n  \u003cli\u003eRated 5000 FPM air velocity and 6 inches WG positive pressure per UL 181\u003c\/li\u003e\n  \u003cli\u003eTemperature range of -20 to 180 degrees F continuous, -20 to 250 degrees F intermittent\u003c\/li\u003e\n  \u003cli\u003eListed to UL 181, NFPA 90A and 90B, IMC, IRC, UMC 10-1, HUD, and ASTM C-518\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style Class 1 flexible duct replacement or new-installation product for 8-inch nominal round duct connections in residential and light commercial forced-air HVAC systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician or sheet metal mechanic in accordance with IMC, IRC, and local mechanical code requirements. Shut down and de-energize the air-handling unit before connecting or disconnecting duct sections. Secure both ends with listed duct straps or clamps and seal all connections with UL 181B-listed mastic or tape as required by the applicable mechanical code. Avoid sharp bends that reduce the interior diameter, as this increases static pressure loss and restricts airflow.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 50 feet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsulation Type\u003c\/strong\u003e: Thick Blanket Fiberglass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsulation Value\u003c\/strong\u003e: R8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCore Material\u003c\/strong\u003e: 2-Ply Polyester\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJacket Material\u003c\/strong\u003e: Metalized Polyester\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAir Velocity Rating\u003c\/strong\u003e: 5000 FPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Positive Pressure\u003c\/strong\u003e: 6 inches WG per UL 181\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Negative Pressure\u003c\/strong\u003e: 1 inch WG per UL 181\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Rating\u003c\/strong\u003e: -20 to 180 degrees F continuous, -20 to 250 degrees F intermittent\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlame Spread Index\u003c\/strong\u003e: 25 maximum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmoke Developed Index\u003c\/strong\u003e: 50 maximum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDuct Type\u003c\/strong\u003e: Class 1, Insulated, Flexible, Plain End\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplicable Standards\u003c\/strong\u003e: UL 181, NFPA 90A and 90B, IMC, IRC, UMC 10-1, HUD, ASTM C-518\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: 031-R8_8X50FT\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ATCO RUBBER PRODUCTS","offers":[{"title":"Default Title","offer_id":51283991658802,"sku":"031-R8_8X50FT","price":188.62,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309276808.jpg?v=1781065313","url":"https:\/\/voomisupply.com\/products\/atco-031-r8_8x50ft-r8-flexible-air-duct-8-in-50-ft-class-1","provider":"Voomi Supply","version":"1.0","type":"link"}