National Chimney
National Chimney M-Flex Chimney Liner | 6-Inch
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
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- Superior Flexibility for Tight Chimney Spaces – The corrugated flexible design allows for smooth installation through narrow or offset chimneys, reducing installation time and effort.
- 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