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316L Mi-FLEX 100mm x 44m COIL (35Z-100-44)
National Flues proudly presents the 316L Mi-FLEX 100mm x 44m Flexible Flue Liner Coil, a top-quality, dual-skinned stainless steel flue liner designed for modern and traditional masonry chimneys. This premium product, crafted from high grade 316L, ensures superior durability, excellent gas flow, and enhanced safety. Fully certified by HETAS and CE, this flexible liner is engineered for various fuels including gas, oil, and solid options, making it the ideal choice for comprehensive chimney relining needs.
In Stock
£993.99
with free delivery
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Crafted from premium 316L stainless steel Dual-skinned design with 0.105mm inner and outer layers Compatible with a variety of fuels including gas, oil, coal, coke, dry logs, and peat HETAS approved and CE certified for enhanced safety Lifetime manufacturer''s warranty when installed with Screw-FIX accessories Convoluted outer design for efficient gas flow and performance
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We Won't Be Beaten On Price
At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:
Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
Operational Efficiency: We have streamlined processes to reduce overhead.
Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.
Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).
“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.
Introducing the 316L Mi-FLEX 100mm x 44m Flexible Flue Liner—an exemplary dual-skinned flexible flue liner perfect for enhancing the functionality and safety of your masonry chimney. Expertly crafted from 316L grade stainless steel, this liner features a smooth inner wall and a durable convoluted outer layer, both 0.105mm thick. This robust construction ensures resilience and a smooth flow of gases, certified by HETAS and CE approved for peace of mind.
Installation is straightforward: always fit from the top, ensure the gas flow arrows point upwards and use a nose cone for easy insertion. Regular maintenance, such as sweeping, will ensure longevity, especially for solid fuel appliances. A fantastic addition to your home or trade project, this product is designed for use with gas, oil, coal, coke, dry logs, and peat.
For optimal performance, always install the liner from the top of your chimney. Ensure that the gas flow arrows are aligned upwards to facilitate the correct direction for exhaust gases. Use a nose cone to ease the process of insertion. Check that your chimney has been swept clean prior to installation. For solid fuel appliances, maintain an annual sweeping routine to uphold safety and extend the product's lifecycle. Always follow the manufacturer's installation guidelines closely to ensure a successful and safe setup.
The 316L Mi-FLEX flue liner is compatible with multiple fuels including gas, oil, coal, coke, cured dry logs, and cured dry peat.
Yes, it is HETAS listed and CE certified, which ensures it meets high safety and quality standards.
The liner should always be installed from the top of the chimney. Ensure the arrows point upwards (direction of gas flow) and use a nose cone for easy fitting.
Before installation, ensure the liner can fit down the chimney, sweep your chimney, and check that the pot is in good condition.
For chimneys serving solid fuel appliances, sweeping and maintenance should be carried out at least once a year to ensure safety and longevity.
Yes, it comes with a lifetime manufacturer's warranty when installed with Screw-FIX accessories.
The flue liner is constructed from a single strip of 316L stainless steel, bent at 180 degrees with a four-plane Omega-Lock seam for maximum reliability and performance.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Monday, May 19th. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call.
If you need faster stove or fireplace delivery please also give us a call.
We can sometimes reduce longer lead times if we pay the carrier £25 for express delivery.
Visit our Shipping Information page for more information.
Warranty & Returns +
All our products come with warranties. Mi-Flex offers a lifetime guarantee.
Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.
Price Match Guarantee +
We will match any price like for like on a retail basis. Give us a call if you find it cheaper and want to buy from us.
Read our review in our 316L Mi-FLEX 100mm x 44m COIL buyers guide
Comprehensive Guide to the 316L Mi-FLEX 100mm x 44m Flexible Flue Liner Coil
Investing in a high-quality flue liner is essential for the safety and efficiency of your home heating system. The 316L Mi-FLEX Flue Liner is designed to meet the rigorous demands of modern heating solutions while ensuring longevity and robust performance.
Understanding the Product
The 316L Mi-FLEX Coil is manufactured from premium 316L stainless steel, which is known for its corrosion resistance and high durability. Both the inner and outer layers are 0.105mm thick, ensuring that the liner not only withstands extreme temperatures but also provides a flawless pathway for exhaust gases. The dual-skinned design is enhanced by a unique convoluted outer pattern that promotes efficient gas flow, reducing the risk of blockages and ensuring optimal performance.
Benefits You Can Rely On
- Safety First: With full HETAS approval and CE certification, the liner complies with the strictest safety standards. This means that whether you are using oil, gas, coal, coke, dry logs, or peat, your chimney system is optimised to reduce harmful emissions and maintain a safer home environment.
- Versatile Fuel Compatibility: Designed to work seamlessly with a variety of fuels, our flue liner delivers consistent performance no matter which heating system you have. This flexibility eliminates the need for multiple liners, making it a cost-effective solution for many households.
- Easy Installation: The flue liner is intended to be installed from the top of the chimney. The clear directional gas flow arrows and the recommendation to use a nose cone simplify the installation process, reducing the risk of errors. Always ensure that the chimney is pre-swept and that the structural integrity is intact prior to installation.
- Lifetime Warranty: Installed with Screw-FIX accessories, the liner is backed by a lifetime warranty. This long-term guarantee provides peace of mind and underscores the confidence National Flues places in the durability and performance of our products.
Addressing Common Objections
We recognise that choosing the right flue liner can be challenging. Some customers may worry about the installation process or the product's compatibility with different fuels. Rest assured, the 316L Mi-FLEX Coil is engineered with user convenience in mind. The installation instructions are straightforward, and if in doubt, National Flues offers dedicated support to guide you through the process. Another common concern is longevity. Thanks to its robust construction and the backing of a lifetime warranty (when used with Screw-FIX accessories), this product provides long-term safety and reliability even under varying fuel conditions.
Technical Excellence You Can Trust
The technical specifications of this flue liner are designed to meet high standards. With dimensions of 100mm in diameter and a length of 44m, it is tailored to the needs of both standard and challenging chimney configurations. The use of high-grade 316L stainless steel ensures that the liner resists corrosion, even in the harshest weather conditions, thus maintaining a consistent performance over time.
How to Make the Most of Your Purchase
To fully benefit from the 316L Mi-FLEX Coil, it is important to follow the recommended installation process. Always install the liner from the top, ensuring that gas flow arrows point in the correct direction. Utilize additional accessories such as the nose cone and Screw-FIX system for a secure and lasting fit. Regular maintenance, including an annual sweep for chimneys with solid fuel appliances, will further extend the lifespan of your liner and uphold your home's safety standards.
Final Thoughts
Choosing the right flue liner is a critical decision for any homeowner or professional installer. The 316L Mi-FLEX 100mm x 44m Flexible Flue Liner Coil by National Flues is not only a product of technological innovation but also one of reliability and enduring value. Every aspect of this product, from its high-grade materials to its certification and ease of installation, has been designed with performance and safety in mind. Whether you are upgrading an existing chimney or building a new one, this liner provides the versatility and assurance needed to handle a variety of fuels safely and efficiently.
By investing in the 316L Mi-FLEX Coil, you are ensuring that your chimney will perform flawlessly for years to come. Engineered for both modern residential needs and traditional settings, it represents the perfect blend of functionality, durability, and safety. National Flues stands by this product with a lifetime warranty when installed with Screw-FIX accessories, demonstrating our commitment to quality and customer satisfaction. With clear benefits, easy installation, and robust performance, this flue liner is an essential component for any efficient and safe chimney system.
If you value quality, performance, and safety, there is no better option than the 316L Mi-FLEX 100mm x 44m Flexible Flue Liner Coil. Add to cart now or call 01670 206 999.
Secure your 316L Mi-FLEX Coil now and enjoy lasting performance and peace of mind.
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