{"product_id":"insulated-flexible-duct-4-inch-25-feet-r4-2-fiberglass-hvac-silver","title":"Insulated Flexible Duct 4 Inch 25 Feet R4.2 Fiberglass HVAC Silver","description":"\u003cstyle\u003e\nbody { font-family: Arial, sans-serif; color: #333; line-height: 1.6; padding: 20px; }\nh1 { color: #1e90ff; text-align: center; font-size: 30px; margin-bottom: 20px; }\nh2 { color: #00bfff; font-size: 24px; border-bottom: 2px solid #1e90ff; padding-bottom: 5px; margin-top: 30px; }\np { font-size: 16px; margin: 10px 0; }\ntable { width: 100%; border-collapse: collapse; margin: 20px 0; background-color: #fff; box-shadow: 0 4px 8px rgba(0,0,0,0.1); }\nth, td { padding: 12px; text-align: left; border: 1px solid #ddd; }\nth { background-color: #1e90ff; color: white; font-weight: bold; }\ntr:nth-child(even) { background-color: #f9f9f9; }\n.highlight { color: #1e90ff; font-weight: bold; }\n.section { background-color: #f0f8ff; padding: 20px; border-radius: 10px; margin: 20px 0; }\nul, ol { margin-left: 20px; }\nli { margin-bottom: 10px; }\n\u003c\/style\u003e \u003ch1\u003emuctamo Insulated Flexible Duct 4 Inch 25 Feet R4.2 Fiberglass HVAC Silver\u003c\/h1\u003e \u003cp\u003eThe \u003cstrong\u003emuctamo Insulated Flexible Duct\u003c\/strong\u003e (MPN: Muctamo-R4-4-25) is a 4-inch diameter, 25-foot silver flexible duct built for high-efficiency thermal insulation in residential and light commercial HVAC systems. Wrapped in R4.2 high-density fiberglass insulation and finished with a durable silver outer jacket, this cylindrical flexible duct is engineered to minimize heat loss and prevent cold air penetration across heating, cooling, and ventilation applications. Lightweight and easy to handle, it is a practical ducting solution for attics, basements, garages, rooftops, and crawl spaces.\u003c\/p\u003e \u003cdiv class=\"section\"\u003e \u003ch2\u003eKey Features\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e\n\u003cspan class=\"highlight\"\u003eR4.2 Fiberglass Insulation\u003c\/span\u003e – High-density fiberglass insulation core delivers an R-value of 4.2, effectively blocking heat loss in heating systems and preventing cold air penetration in cooling setups for year-round HVAC efficiency.\u003c\/li\u003e \u003cli\u003e\n\u003cspan class=\"highlight\"\u003e4-Inch Diameter, 25-Foot Length\u003c\/span\u003e – Sized to fit standard 4-inch HVAC connections; the 25-foot run provides generous coverage for longer duct runs without splicing.\u003c\/li\u003e \u003cli\u003e\n\u003cspan class=\"highlight\"\u003eFlexible Cylindrical Design\u003c\/span\u003e – The flexible construction bends and routes around obstacles, joists, and tight spaces without requiring rigid fittings or specialized tools for installation.\u003c\/li\u003e \u003cli\u003e\n\u003cspan class=\"highlight\"\u003eSilver Weather-Resistant Outer Jacket\u003c\/span\u003e – The silver outer layer is designed to withstand temperature extremes and UV exposure, making it suitable for both indoor and outdoor installation environments including garages, rooftops, and basements.\u003c\/li\u003e \u003cli\u003e\n\u003cspan class=\"highlight\"\u003eCompression and Tear Resistant\u003c\/span\u003e – Thickened construction resists compression and tearing during installation and long-term use, helping maintain airflow performance over time.\u003c\/li\u003e \u003cli\u003e\n\u003cspan class=\"highlight\"\u003eLightweight and Easy to Cut\u003c\/span\u003e – The flexible, lightweight form factor allows the duct to be cut to length and shaped on-site without heavy equipment, reducing installation time.\u003c\/li\u003e \u003cli\u003e\n\u003cspan class=\"highlight\"\u003eVersatile Application Range\u003c\/span\u003e – Suitable for HVAC air distribution, hot water pipe insulation, and cooling system ducting in residential and light commercial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cspan class=\"highlight\"\u003eSingle Duct Included\u003c\/span\u003e – Sold as one complete 25-foot insulated flexible duct section ready for installation.\u003c\/li\u003e \u003c\/ul\u003e\n\u003c\/div\u003e \u003cdiv class=\"section\"\u003e \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e \u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e \u003cth\u003eSpecification\u003c\/th\u003e \u003cth\u003eDetails\u003c\/th\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003emuctamo\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMPN\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eMuctamo-R4-4-25\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eFlexible Duct\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eFiberglass\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eInsulation R-Value\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eR4.2\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eItem Diameter\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e4 inches\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eItem Length\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e25 feet\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eInsulation Thickness\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e2 inches\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eCylindrical Flexible\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eHose \/ Duct Color\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSilver\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eNumber of Hoses\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eFlexible, Insulated\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCoverage\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e25.13 square feet\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eChina\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCompatible Brand\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003emuctamo\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e\n\u003c\/div\u003e \u003cdiv class=\"section\"\u003e \u003ch2\u003eUse Cases \u0026amp; Applications\u003c\/h2\u003e \u003cp\u003eThe muctamo 4-inch R4.2 insulated flexible duct is well suited for a wide range of HVAC and insulation tasks:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eHVAC Air Distribution\u003c\/strong\u003e – Connect supply and return air runs in residential forced-air heating and cooling systems where a 4-inch duct connection is required.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAttic \u0026amp; Crawl Space Runs\u003c\/strong\u003e – The flexible form routes easily through tight attic joists and crawl space framing without rigid elbow fittings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBasement \u0026amp; Garage Installations\u003c\/strong\u003e – The weather-resistant silver jacket handles temperature swings common in unconditioned spaces.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRooftop HVAC Connections\u003c\/strong\u003e – UV-resistant outer layer supports exposed rooftop duct runs where solar exposure is a factor.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePipe \u0026amp; Duct Insulation Wrap\u003c\/strong\u003e – R4.2 fiberglass insulation is also suitable for wrapping hot water pipes and cooling lines to reduce thermal transfer.\u003c\/li\u003e \u003c\/ul\u003e\n\u003c\/div\u003e \u003cdiv class=\"section\"\u003e \u003ch2\u003eWhat Is Included\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e1 × muctamo Insulated Flexible Duct – 4 inch diameter, 25 feet long, R4.2 fiberglass insulation, silver outer jacket\u003c\/li\u003e \u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e muctamo\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNumber of Hoses:\u003c\/strong\u003e 1\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e Flexible\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Flexible Duct\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e Fiberglass\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eItem Diameter:\u003c\/strong\u003e 4 in\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eItem Length:\u003c\/strong\u003e 25 ft\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShape:\u003c\/strong\u003e Cylindrical Flexible\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHose Color:\u003c\/strong\u003e Silver\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible Brand:\u003c\/strong\u003e muctamo\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMPN:\u003c\/strong\u003e Muctamo-R4-4-25\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e China\u003c\/p\u003e\n\u003c\/div\u003e","brand":"muctamo","offers":[{"title":"Default Title","offer_id":43943859454070,"sku":"A26026\/RNAI","price":67.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/4277\/6950\/files\/10_c3245a53-d741-40ba-be94-0c19547a1671.jpg?v=1785802565","url":"https:\/\/sellizoe.com\/products\/insulated-flexible-duct-4-inch-25-feet-r4-2-fiberglass-hvac-silver","provider":"Sellizo","version":"1.0","type":"link"}