{"product_id":"quietflex-flex-r4-7bag-insulated-flex-duct-7in-r4-2-25ft","title":"Quietflex flex-r4-7bag Insulated Flex Duct 7in R4.2 25ft","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe QUIETFLEX flex-r4-7bag is a rip stop insulated flexible duct designed for residential and light commercial HVAC air distribution systems. Built on the 40 Series platform, it features a 7-inch inner diameter, a 25-foot length, and an R4.2 insulation value to reduce heat gain and loss across supply runs. The outer jacket is constructed from metalized polyester, with a fiberglass insulation layer and a polyester inner core. Rated for airflow up to 6,000 feet per minute, this duct handles high-velocity system demands. Licensed HVAC technicians and sheet metal contractors install this product as part of forced-air duct systems.\u003c\/p\u003e\n\u003cp\u003eThis flexible duct is suited for supply air branch runs in residential forced-air systems and light commercial applications where routing around framing, joists, or mechanical obstructions is required. The rip stop construction resists tearing during installation and handling. It is appropriate for attic, crawlspace, and interior ceiling plenum installations where a silver metalized finish and vapor barrier performance are required. The -20 to 180 degrees F temperature rating covers standard heating and cooling operating conditions.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eR4.2 insulation value minimizes thermal loss on supply air runs\u003c\/li\u003e\n  \u003cli\u003eRip stop construction resists tearing during routing and installation\u003c\/li\u003e\n  \u003cli\u003e6,000 feet per minute maximum flow rate supports high-velocity systems\u003c\/li\u003e\n  \u003cli\u003ePressure rating of -0.5 to 10 inches water column for standard forced-air use\u003c\/li\u003e\n  \u003cli\u003eVapor transmission of 0.05 or less reduces moisture infiltration\u003c\/li\u003e\n  \u003cli\u003eTri-layer construction: polyester inner liner, fiberglass insulation, metalized polyester outer jacket\u003c\/li\u003e\n  \u003cli\u003eTemperature rated from -20 to 180 degrees F for heating and cooling service\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 residential and light commercial forced-air HVAC supply branch duct systems requiring a 7-inch diameter connection.\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. Power down the air handler or furnace and isolate the system before connecting or disconnecting duct sections. Secure each end with an approved duct clamp and mastic or UL-listed foil tape — do not rely on tape alone as the primary seal. Avoid sharp bends that reduce effective diameter and increase static pressure drop across the run.\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\u003eFlow Rate\u003c\/strong\u003e: 6,000 feet per minute\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInsulation Value\u003c\/strong\u003e: R4.2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Rating\u003c\/strong\u003e: -0.5 to 10 inches water column\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Rating\u003c\/strong\u003e: -20 to 180 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVapor Transmission\u003c\/strong\u003e: 0.05 or less\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Polyester \/ Fiberglass \/ Metalized Polyester\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Silver\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 40 Series\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 24 inches x 10.75 inches x 24 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 10.21 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e: Domestic\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: QUIETFLEX\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: flex-r4-7bag\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QUIETFLEX","offers":[{"title":"Default Title","offer_id":51138534506802,"sku":"FLEX-R4-7BAG","price":62.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/305532245.png?v=1778258715","url":"https:\/\/voomisupply.com\/products\/quietflex-flex-r4-7bag-insulated-flex-duct-7in-r4-2-25ft","provider":"Voomi Supply","version":"1.0","type":"link"}