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904L Mi-FLEX 250mm x 1m CUT LENGTH (36Z-250-1)
Introducing the 904L Mi-FLEX 250mm x 1m Cut Length Flue Liner from National Flues: a premium, flexible, double-skinned stainless steel flue liner designed for relining masonry chimneys. Engineered to accommodate a range of fuel types including gas, oil, coal and more, this top-quality flue liner not only meets high industry standards with its HETAS and CE certifications but also delivers long-lasting performance reinforced by a lifetime warranty when installed with Screw-FIX accessories.
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In Stock
£215.99
with free delivery
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Premium 904L stainless steel construction
Double-skinned flexible design for enhanced durability
Lifetime warranty when installed with Screw-FIX accessories
HETAS and CE approved for safety and quality standards
Comprehensive installation and maintenance guidelines
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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.
The 904L Mi-FLEX 250mm x 1m CUT LENGTH Flue Liner is the perfect choice for relining masonry chimneys, offering superior performance and durability. Crafted from high-quality 904L grade stainless steel, this double-skinned flexible flue liner boasts a smooth inner lining and a convoluted outer skin, both at 0.105mm thickness. The innovative quattrolock seal ensures robust construction, making it suitable for burning gas, oil, coal, coke, cured dry logs, cured dry peat, and approved smokeless fuels.
It is HETAS and CE approved for safety and peace of mind. Comprehensive installation and maintenance guidelines ensure ease of fitting and long-term reliability.
For optimal performance, install this flue liner from the top of the chimney, ensuring the directional arrows point upwards to promote proper gas flow. Always follow the comprehensive installation guidelines provided in the manual. It is crucial to use only approved accessories during installation, such as the recommended Screw-FIX fittings, to maintain safety standards and guarantee the lifetime warranty. Before commencing installation, check that all components are in good condition and comply with local building regulations.
This flue liner is compatible with gas, oil, coal, coke, cured dry logs, cured dry peat, and approved smokeless fuels.
Yes, the flue liner has comprehensive installation guidelines and should be fitted from the top of the chimney, ensuring the arrows point upward for proper gas flow.
The 904L Mi-FLEX Flue Liner is HETAS and CE approved, ensuring it meets high safety and quality standards.
Yes, National Flues offers reliable nationwide delivery for both retail and trade customers.
It is recommended to sweep chimneys serving solid fuel appliances at least once a year or more frequently as necessary.
Both the inner and outer linings of the 904L Mi-FLEX Flue Liner are 0.105mm thick.
The 904L Mi-FLEX Flue Liner comes with a lifetime manufacturer's warranty when installed with Screw-FIX accessories.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Wednesday, April 30th.
If you need faster stove or fireplace delivery please give us a call.
We can often 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 904L Mi-FLEX 250mm x 1m CUT LENGTH buyers guide
Comprehensive Buyers Guide for the 904L Mi-FLEX Flue Liner
Selecting the right flue liner for your chimney is a critical decision that impacts both the efficiency and safety of your heating system. The 904L Mi-FLEX 250mm x 1m Cut Length Flue Liner from National Flues is designed to meet demanding performance expectations, providing a robust, cost-effective solution for relining masonry chimneys.
Product Overview
The 904L Mi-FLEX Flue Liner is crafted from high-quality 904L stainless steel, featuring a double-skinned design with both inner and outer layers at 0.105mm thickness. This construction not only ensures optimal heat retention but also offers enhanced resistance against the corrosive effects of varied fuels. With its innovative Omega-Lock seal and lifetime warranty (when fitted with Screw-FIX accessories), it is built to deliver reliability and peace of mind for many years.
Key Features and Their Benefits
- Premium Material: Manufactured from 904L stainless steel, the liner is robust and resistant to high temperatures, ensuring longevity.
- Double-Skinned Design: The inner smooth layer provides efficient gas flow, while the convoluted outer skin maximises thermal retention, translating into improved heating efficiency.
- Standard Compliance: HETAS and CE approvals mean that the product meets rigorous safety and quality protocols, providing confidence to both homeowners and professionals.
- Fuel Versatility: Compatible with gas, oil, coal, coke, cured dry logs, cured dry peat, and approved smokeless fuels, catering to a variety of heating requirements.
- Lifetime Warranty: Enjoy long-term assurance when installed with the right accessories, reducing the need for frequent replacements and maintenance.
Detailed Installation Guidance
Proper installation is key to unlocking the full potential of your flue liner. Here are some important considerations:
- Installation Orientation: Always install the flue liner from the top of the chimney. This ensures that the legal and effective venting of gases is maintained.
- Directional Indicators: Check that the arrows marked on the flue liner are oriented upward. This guarantees the optimal flow of combustion gases, thereby enhancing overall performance.
- Accessory Use: It is essential to use official accessories, such as Screw-FIX fittings, to secure the liner properly and comply with warranty conditions.
- Safety Check: Prior to installation, inspect all components to ensure there are no damages. Follow the provided instruction manual closely to avoid any safety risks.
Understanding the Benefits
Opting for the 904L Mi-FLEX Flue Liner offers several tangible benefits:
- Improved Efficiency: With its double-skinned design, the flue liner minimises heat loss, thereby improving combustion efficiency and reducing fuel costs over time.
- Enhanced Safety: The HETAS and CE approvals mean that the product adheres to high safety standards, protecting you and your family from potential hazards.
- Durability: High-quality construction material extends the lifespan of your chimney liner, meaning less frequent replacements and enhanced performance.
- Versatility: Whether your heating system runs on gas, oil, or solid fuels like coal and coke, this liner is engineered to handle all, making it adaptable to various heating needs without compromising on performance.
- Cost-Effective: The lifetime warranty and low maintenance requirements make it an economical long-term investment for your home or business.
Overcoming Common Objections
Durability Concerns: Some buyers worry about whether a flexible liner can truly offer long-lasting durability. Rest assured, the 904L Mi-FLEX is built from high-grade stainless steel with a proven track record of performance even under demanding conditions.
Installation Complexity: Concerns about the complexity of installing a new flue liner are common. However, with clear, comprehensive guidelines and the availability of compatible accessories like the Screw-FIX system, the installation process is straightforward for professionals and experienced DIY enthusiasts alike.
Fuel Compatibility: Potential buyers may question if this value-priced solution can handle different fuel types. The Mi-FLEX flue liner is rigorously tested and approved for a variety of fuels, ensuring that regardless of your heating fuel, the liner will perform reliably.
Regulatory Compliance: Ensuring that your home complies with local safety standards can also be a concern. The HETAS and CE certifications provide clear evidence that this product not only meets but exceeds the required safety norms.
Choosing the Right Accessories
While the 904L Mi-FLEX Flue Liner is a stellar product on its own, pairing it with the correct accessories can further enhance its performance and ease of installation. Consider exploring additional Screw-FIX accessories and other installation supports available from National Flues to ensure a seamless, secure setup.
Final Considerations
Making an informed decision is essential when investing in a chimney liner. The 904L Mi-FLEX Flue Liner stands out for its premium quality, exceptional durability, and compliance with stringent safety standards, making it an ideal choice for upgrading your chimney. With the benefits of a lifetime warranty and compatibility with various fuels, this product offers an unmatched balance of quality and cost-effectiveness. If you are looking to enhance the efficiency and safety of your heating system, this flexible flue liner is the optimal solution.
Make your purchase with confidence, knowing that National Flues is a trusted supplier offering nationwide delivery and dedicated customer support. Invest in quality, invest in safety, and enjoy the benefits of superior performance with the 904L Mi-FLEX Flue Liner.
Buy now or call 01670 206 999.
Secure the superior 904L Mi-FLEX Flue Liner for your chimney today and enjoy unmatched performance and safety!
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