{"product_id":"national-chimney-m-flex-pre-insulated-wood-burning-insert-liner-kit","title":"National Chimney M-Flex Pre-Insulated Wood-Burning Insert Liner Kit","description":"\u003ch3 style=\"text-align: center;\"\u003eNational Chimney M-Flex Pre-Insulated Wood-Burning Insert Liner Kit\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eNational Chimney M-Flex Pre-Insulated Wood-Burning Insert Liner Kit\u003c\/strong\u003e, a premium chimney relining solution designed for wood stoves and fireplace inserts. This high-performance pre-insulated chimney liner kit is engineered to improve draft efficiency, enhance safety, and deliver consistent venting performance for demanding residential heating applications.\u003c\/p\u003e\n\u003cp\u003eBuilt with a durable 316L stainless steel inner liner and a protective aluminum outer casing, this insulated chimney liner system ensures excellent heat retention and long-lasting corrosion resistance. Ideal for wood-burning insert installations, it supports high-temperature operation while improving overall chimney efficiency. Easy to install and built for reliability, this wood stove chimney liner kit is the perfect upgrade for safer, more efficient, and professional-grade venting performance.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePre-Insulated Chimney Liner for Maximum Efficiency\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Featuring \u003c\/span\u003e1\/2\" thick pre-insulation, this pre-insulated chimney liner kit reduces condensation, improves draft performance, and enhances overall wood-burning stove efficiency while minimizing creosote buildup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eUL 1777 Listed All-Fuel Chimney Liner System\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Certified for safe operation with \u003c\/span\u003ewood, coal, oil, gas, and pellet appliances, ensuring reliable performance in all all-fuel chimney venting applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePremium 316L Stainless Steel Inner Liner\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Constructed from mill-certified \u003c\/span\u003e316L stainless steel, this chimney liner system delivers exceptional corrosion resistance, high-heat durability, and long-term reliability for chimney relining projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFlexible Aluminum Outer Casing\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Lightweight and highly flexible, the \u003c\/span\u003ealuminum outer shell chimney liner\u003cspan\u003e allows easier handling and installation, especially in tight or offset chimney spaces.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eEnhanced Draft \u0026amp; Reduced Creosote Formation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Insulated design maintains consistent flue temperatures, improving \u003c\/span\u003echimney draft efficiency\u003cspan\u003e and reducing dangerous creosote accumulation for safer operation.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eComplete Chimney Liner Installation Kit\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Includes a \u003c\/span\u003estove adapter, rain cap, and 13” x 13” top plate, providing a full chimney relining kit\u003cspan\u003e for quick and professional installation.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eOptimized for Wood-Burning Insert Applications\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Specifically engineered for \u003c\/span\u003ewood stove and fireplace insert installations\u003cspan\u003e, delivering improved combustion performance and heating efficiency.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAvailable in Standard Length Options\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Offered in \u003c\/span\u003e25 ft and 35 ft lengths, making it suitable for most residential chimney liner replacement projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHigh Flexibility for Easy Installation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Designed to navigate offsets and existing masonry chimneys with ease, reducing installation time and complexity.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eTransferable Lifetime Warranty Protection\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Backed by a \u003c\/span\u003elifetime transferable warranty\u003cspan\u003e, ensuring long-term confidence and dependable performance.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter*\u003c\/th\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003cth\u003eInner Material\u003c\/th\u003e\n\u003cth\u003eOuter Material\u003c\/th\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\"\u003c\/td\u003e\n\u003ctd\u003e25'\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003ctd\u003eCBP625KIT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\"\u003c\/td\u003e\n\u003ctd\u003e35'\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003ctd\u003eCBP635KIT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7\"\u003c\/td\u003e\n\u003ctd\u003e25'\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003ctd\u003eCBP725KIT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e7\"\u003c\/td\u003e\n\u003ctd\u003e35'\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003ctd\u003eCBP735KIT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8\"\u003c\/td\u003e\n\u003ctd\u003e25'\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003ctd\u003eCBP825KIT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e8\"\u003c\/td\u003e\n\u003ctd\u003e35'\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003ctd\u003eCBP835KIT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAdd additional 1-inch to compensate for 1\/2\" thickness of insulation.\u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLimited Lifetime Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDocuments \u0026amp; Files\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0780\/6926\/8771\/files\/SmoothwallLiner_Brochure_MFlex.pdf?v=1781601228\" target=\"_blank\"\u003eProduct Brochure\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0780\/6926\/8771\/files\/CB-AL-Install.pdf?v=1781595640\" target=\"_blank\"\u003eInstallation Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"National Chimney","offers":[{"title":"25 Foot","offer_id":55239782793507,"sku":"DBP625BK","price":1429.68,"currency_code":"USD","in_stock":true},{"title":"35 Foot","offer_id":55239786070307,"sku":"DBP635BK","price":1825.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/6926\/8771\/files\/National-Chimney-M-Flex-Pre-Insulated-Wood-Burning-Insert-Liner-Kit-National-Chimney-Dreamwood-Living-233673460.jpg?v=1781602794","url":"https:\/\/www.dreamwoodliving.com\/products\/national-chimney-m-flex-pre-insulated-wood-burning-insert-liner-kit","provider":"Dreamwood Living","version":"1.0","type":"link"}