{"product_id":"national-chimney-m-flex-chimney-liner-6-inch","title":"National Chimney M-Flex Chimney Liner | 6-Inch","description":"\u003ch3 style=\"text-align: center;\"\u003eNational Chimney M-Flex Chimney Liner | 6-Inch\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eNational Chimney M-FLEX 6-Inch Stainless Steel Chimney Liner\u003c\/strong\u003e, a premium solution designed for chimney relining and new construction installations. Engineered for superior performance, this 6-inch flexible chimney liner delivers excellent draft efficiency, improved airflow, and reliable venting for wood stoves, fireplaces, and insert applications.\u003c\/p\u003e\n\u003cp\u003eBuilt for long-lasting durability, this stainless steel chimney liner system combines strength and flexibility to navigate existing chimney structures with ease. Ideal for homeowners and professionals, the National Chimney M-FLEX liner kit ensures safe, efficient exhaust flow while resisting corrosion and high-temperature conditions. Perfect for upgrading aging chimneys, it provides a dependable chimney venting solution that enhances heating efficiency and overall system performance.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePremium 316L Stainless Steel Chimney Liner Construction\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Manufactured from high-grade \u003c\/span\u003e.006” thick 316L stainless steel, this 6-inch chimney liner\u003cspan\u003e delivers exceptional durability, corrosion resistance, and protection against creosote buildup for long-lasting chimney performance.\u003c\/span\u003e\n\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 – Fully tested and certified under \u003c\/span\u003eUL 1777, UL 64, and UL 441 standards, ensuring safe and reliable venting for wood, pellet, coal, oil, gas, and corn-burning appliances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFlexible Chimney Liner for Easy Installation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Designed with a \u003c\/span\u003e7-ply interlocked and crimped construction, this flexible chimney liner kit easily navigates tight bends, offsets, and existing masonry chimney structures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eGas and Watertight Sealing Technology\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Engineered to create a secure \u003c\/span\u003eairtight and watertight chimney seal\u003cspan\u003e, supporting thermal expansion and contraction while maintaining optimal venting efficiency.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHigh-Performance Chimney Relining Solution\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Ideal for \u003c\/span\u003echimney relining projects\u003cspan\u003e, improving draft performance, enhancing airflow, and ensuring safer exhaust gas evacuation in residential heating systems.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eEnhanced Draft \u0026amp; Venting Efficiency\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Optimizes chimney airflow to improve appliance efficiency and reduce buildup, making it a reliable \u003c\/span\u003estainless steel chimney venting system\u003cspan\u003e for modern homes.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSuperior Flexibility for Tight Chimney Spaces\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – The corrugated flexible design allows for smooth installation through narrow or offset chimneys, reducing installation time and effort.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eLifetime Transferable Warranty Protection\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Backed by a \u003c\/span\u003elifetime transferable warranty\u003cspan\u003e when professionally installed and maintained, ensuring long-term confidence and product reliability.\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\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNational Chimney\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM-FLEX Stainless Steel Chimney Liner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSteel Thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.006 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable Lengths\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25 ft, 50 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCorrugated, 7-ply interlocked and crimped\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUL Certification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUL 1777, UL 64, UL 441\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuel Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWood, Oil, Coal, Gas, Pellet, Corn\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLifetime Transferable Warranty (Professional Maintenance Required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\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 href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0780\/6926\/8771\/files\/MflexLiner_Brochure_MFlex_3a9387ea-7313-4eab-a55b-61c906a38b6c.pdf?v=1781605447\" target=\"_blank\" rel=\"noopener\"\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\/DB-Install.pdf?v=1781602995\" target=\"_blank\"\u003eInstallation Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"National Chimney","offers":[{"title":"50 Foot","offer_id":55239821230371,"sku":"CB650","price":1369.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/6926\/8771\/files\/National-Chimney-M-Flex-Chimney-Liner-_-6-Inch-National-Chimney-Dreamwood-Living-233674329.png?v=1781605564","url":"https:\/\/www.dreamwoodliving.com\/products\/national-chimney-m-flex-chimney-liner-6-inch","provider":"Dreamwood Living","version":"1.0","type":"link"}