National Chimney M-Flex Chimney Liner | 6-Inch
The National Chimney M-FLEX 6-Inch Stainless Steel Chimney Liner, 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.
Built 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.
Features
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Premium 316L Stainless Steel Chimney Liner Construction – Manufactured from high-grade .006” thick 316L stainless steel, this 6-inch chimney liner delivers exceptional durability, corrosion resistance, and protection against creosote buildup for long-lasting chimney performance.
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UL 1777 Listed All-Fuel Chimney Liner System – Fully tested and certified under UL 1777, UL 64, and UL 441 standards, ensuring safe and reliable venting for wood, pellet, coal, oil, gas, and corn-burning appliances.
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Flexible Chimney Liner for Easy Installation – Designed with a 7-ply interlocked and crimped construction, this flexible chimney liner kit easily navigates tight bends, offsets, and existing masonry chimney structures.
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Gas and Watertight Sealing Technology – Engineered to create a secure airtight and watertight chimney seal, supporting thermal expansion and contraction while maintaining optimal venting efficiency.
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High-Performance Chimney Relining Solution – Ideal for chimney relining projects, improving draft performance, enhancing airflow, and ensuring safer exhaust gas evacuation in residential heating systems.
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Enhanced Draft & Venting Efficiency – Optimizes chimney airflow to improve appliance efficiency and reduce buildup, making it a reliable stainless steel chimney venting system for modern homes.
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Superior Flexibility for Tight Chimney Spaces – The corrugated flexible design allows for smooth installation through narrow or offset chimneys, reducing installation time and effort.
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Lifetime Transferable Warranty Protection – Backed by a lifetime transferable warranty when professionally installed and maintained, ensuring long-term confidence and product reliability.
Specifications
| Specification |
Details |
| Brand |
National Chimney |
| Model |
M-FLEX Stainless Steel Chimney Liner |
| Material |
316L Stainless Steel |
| Steel Thickness |
.006 inches |
| Diameter |
6 inches |
| Available Lengths |
25 ft, 50 ft |
| Construction |
Corrugated, 7-ply interlocked and crimped |
| UL Certification |
UL 1777, UL 64, UL 441 |
| Fuel Compatibility |
Wood, Oil, Coal, Gas, Pellet, Corn |
| Warranty |
Lifetime Transferable Warranty (Professional Maintenance Required) |
Warranty
- Limited Lifetime Warranty
Documents & Files
