{"product_id":"atco-070-r4-2_7x25ft-insulated-flex-duct-r-4-2-7in-x-25ft","title":"Atco 070-R4.2_7X25FT Insulated Flex Duct R-4.2 7in X 25ft","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ATCO RUBBER PRODUCTS 070-R4.2_7X25FT is a Class 1 insulated flexible air duct designed for residential and commercial HVAC distribution systems. It measures 7 inches in diameter and comes in a 25-foot length, insulated with a thick blanket of fiberglass at R-4.2. The 2-ply polyester inner core is air-tight and smooth to minimize friction loss and prevent fiberglass erosion into the air stream. An encapsulated wire helix maintains shape and allows clean cuts without unraveling. The gray polyester outer jacket resists tearing and puncture. Rated for air velocity up to 5000 FPM and positive pressure up to 6 inches WG, this duct handles demanding airflow requirements without compromise. Licensed HVAC technicians and sheet metal contractors are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis flexible duct is suited for trunk-and-branch residential forced-air systems, light commercial HVAC layouts, and retrofit applications where rigid duct installation is impractical. It performs within a continuous temperature range of -20 to 180 degrees F and an intermittent range up to 250 degrees F, making it compatible with standard gas furnace, heat pump, and air handler supply runs. The plain-end termination fits standard collars and takeoffs used in typical residential and commercial ducted HVAC systems. Its compact carton format reduces handling requirements on the jobsite.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eR-4.2 thick blanket fiberglass insulation for energy-efficient thermal performance\u003c\/li\u003e\n  \u003cli\u003eAir-tight 2-ply polyester smooth inner core eliminates fiberglass erosion into the air stream and reduces friction loss\u003c\/li\u003e\n  \u003cli\u003eEncapsulated wire helix holds shape and prevents unraveling when cut to length\u003c\/li\u003e\n  \u003cli\u003eGray polyester outer jacket provides tear and puncture resistance with low maintenance requirements\u003c\/li\u003e\n  \u003cli\u003eRated to 5000 FPM air velocity and 6 inches WG positive pressure per UL 181\u003c\/li\u003e\n  \u003cli\u003eWide temperature range: -20 to 180 degrees F continuous, up to 250 degrees F intermittent\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and new-installation flexible duct for Class 1 ducted HVAC supply and return air applications meeting UL 181, NFPA 90A and 90B, IMC, IRC, UMC 10-1, HUD, and ASTM C-158 requirements.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician or qualified sheet metal contractor in accordance with NFPA 90A, NFPA 90B, and the applicable mechanical code (IMC or UMC). Power down the air handler or furnace and close the system isolation point before connecting or disconnecting duct sections. Flexible duct should be supported at manufacturer-recommended intervals to prevent sagging, which increases static pressure loss. Do not compress or over-bend the duct, as excessive bends reduce airflow efficiency and can damage the inner core.\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\u003eInsulation Type\u003c\/strong\u003e: Thick Blanket Fiberglass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eR-Value\u003c\/strong\u003e: R-4.2\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: 3\/4 inch WG per UL 181\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Rating (Continuous)\u003c\/strong\u003e: -20 to 180 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Rating (Intermittent)\u003c\/strong\u003e: -20 to 250 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Core Material\u003c\/strong\u003e: 2-Ply Polyester\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJacket Material\u003c\/strong\u003e: Gray Polyester\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\u003eFlame Spread (Maximum)\u003c\/strong\u003e: 25\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmoke Developed (Maximum)\u003c\/strong\u003e: 50\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-158\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: 070-R4.2_7X25FT\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ATCO RUBBER PRODUCTS","offers":[{"title":"Default Title","offer_id":51284051820850,"sku":"070-R4.2_7X25FT","price":58.43,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/309278041.jpg?v=1781067217","url":"https:\/\/voomisupply.com\/products\/atco-070-r4-2_7x25ft-insulated-flex-duct-r-4-2-7in-x-25ft","provider":"Voomi Supply","version":"1.0","type":"link"}