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904L Mi-FLEX 300mm x 1m CUT LENGTH (36Z-300-1)
Discover the 904L Mi-FLEX 300mm x 1m CUT LENGTH flue liner from National Flues—the premium, multi-fuel flexible liner designed for masonry chimneys. Perfect for various fuels including gas, oil, and coal, this high-performance stainless steel liner is HETAS approved and CE certified. Ideal for chimney relining, the 904L Mi-FLEX offers unmatched durability and efficiency, ensuring safe and effective flue operation in every installation.
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In Stock
£347.49
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 with 0.105mm thick inner and outer layers
Double-skinned, flexible design for effective chimney relining
Multi-fuel versatility: compatible with gas, oil, coal, coke, cured dry logs, cured dry peat and smokeless fuels
Omega-Lock seam for an unrivalled, secure seal
HETAS approved and CE certified for safety and quality
Lifetime manufacturer’s warranty when installed with Screw-FIX accessories
Designed for top-down installation ensuring optimal gas flow
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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 300mm x 1m CUT LENGTH is a robust, double-skinned flexible flue liner seamlessly designed for relining masonry chimneys. Ideal for multi-fuel use, this liner works perfectly with burning gas, oil, coal, coke, cured dry logs, cured dry peat, and approved smokeless fuels. Constructed from premium 904L grade stainless steel, both the smooth inner and convoluted outer layers are 0.105mm thick.
The flue liner's quattrolock seam ensures an unrivaled seal, achieved by folding a single strip of steel at 180 degrees and then folding it four ways. Rigorous HETAS and CE approvals confirm its quality, making it a stellar choice. Installation should be from the top, ensuring the arrows indicate upward gas flow.
Follow a meticulous process including chimney sweeping and pot inspection for optimal performance. Maintenance involves regular sweeping, at least annually for solid fuel appliances.
SKU: 36Z-300-1
Technical Specifications
SKU
36Z-300-1
Model
904L Mi-FLEX 300mm x 1m CUT LENGTH
Dimensions
300mm x 1m (cut length)
Material
904L stainless steel (0.105mm thick inner and outer layers)
• Install from the top of your masonry chimney, ensuring that all directional arrows point upwards to facilitate proper gas flow.
• Prior to installation, conduct a thorough chimney sweep and pot inspection to eliminate any blockages or creosote build-up.
• Secure the liner using recommended Screw-FIX accessories to maintain the lifetime warranty and ensure system stability.
• Follow manufacturer guidelines meticulously for both safety and peak performance.
• Regular inspection and maintenance (at least annually for solid fuel appliances) will help sustain optimal functionality and prolong the lifespan of your system.
Yes, this flue liner is designed for multi-fuel use, including gas, oil, coal, coke, cured dry logs, cured dry peat, and approved smokeless fuels.
The flue liner is HETAS approved and CE certified, ensuring it meets all quality and safety standards.
Installation should be done from the top, ensuring the arrows point upwards for correct gas flow. Additionally, you should sweep your chimney and inspect the pot beforehand.
Yes, the 904L Mi-FLEX 300mm x 1m CUT LENGTH comes with a lifetime manufacturer’s warranty when installed with Screw-FIX accessories.
For solid fuel appliances, it is recommended to sweep and maintain your chimney at least once a year.
Yes, the 904L Mi-FLEX flexible flue liner is specifically designed for relining within masonry chimneys.
Both the inner and outer layers of the flue liner are 0.105mm thick.
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 300mm x 1m CUT LENGTH buyers guide
Comprehensive Buyers Guide for the 904L Mi-FLEX 300mm x 1m CUT LENGTH Flue Liner
When it comes to chimney relining, choosing the right flue liner is paramount. National Flues proudly presents the 904L Mi-FLEX 300mm x 1m CUT LENGTH flue liner—a product that embodies quality, safety, and durability. In this guide, we will walk you through why this product stands out, explore its key features, provide detailed installation and maintenance instructions, and address common concerns to help you make an informed decision.
Introduction
Relining your chimney is an investment in safety and efficiency. Over time, masonry chimneys can develop cracks or accumulate deposits that compromise performance and increase the risk of dangerous emissions. The 904L Mi-FLEX flue liner is designed to offer a reliable solution, ensuring that your chimney remains compliant with the latest safety standards while providing excellent performance across a variety of fuel types.
Key Features and Their Benefits
- Premium 904L Stainless Steel Construction: Crafted from 904L stainless steel, both the inner and outer layers boast a thickness of 0.105mm. This construction ensures not only a robust barrier against high temperatures and corrosive by-products but also delivers longevity and durable performance.
- Double-Skinned Flexible Design: The flexible nature of the liner offers ease of installation in existing masonry chimneys and ensures excellent thermal insulation, which in turn boosts energy efficiency in your heating system.
- Multi-Fuel Compatibility: Whether you use gas, oil, or even approved smokeless fuels, the 904L Mi-FLEX is designed to safely manage various fuel types. This versatility means you can enjoy superior performance regardless of your heating method.
- Omega-Lock Seam Technology: The innovative Omega-Lock seam is integral for creating a completely sealed joint. This reduces the risk of hazardous leaks and enhances the overall safety and efficiency of your chimney system.
- HETAS and CE Certifications: With certifications from HETAS and CE, this liner meets stringent quality and safety standards. This not only ensures reliable performance but also provides you with peace of mind knowing that your installation is thoroughly compliant with industry regulations.
- Lifetime Warranty with Screw-FIX Accessories: When installed with Screw-FIX accessories, this flue liner comes with a lifetime manufacturer’s warranty. This guarantee reflects the confidence National Flues has in the superior construction and performance of the product.
Installation and Maintenance
Installation: The recommended installation method is from the top of your chimney. This approach utilises the inherent design of the liner, which guides flue gases upwards through clearly marked directional arrows. Prior to fitting the liner, ensure that your chimney has been thoroughly swept and that the pot is inspected for any potential hazards. Although the installation process is straightforward, some optional accessories can further streamline the setup, ensuring a perfect fit and enhanced stability.
Maintenance: Regular maintenance is key to the longevity and efficiency of your flue system. For those using solid fuel appliances, it is advisable to have your chimney swept at least once a year. This routine cleaning helps in preventing build-up, ensuring that the liner continues to operate efficiently and safely over time. Follow all safety instructions and manufacturer guidelines to maintain optimal performance.
Why Choose National Flues?
National Flues is a trusted name in the heating and flue sector, known for delivering high-quality products that marry cutting-edge technology with traditional craftsmanship. With our wide range of products and nationwide delivery service, we cater to both retail and trade customers. The 904L Mi-FLEX flue liner is a testament to our commitment to excellence, backed by a lifetime warranty when installed with the correct accessories. Our product selection is not only compliant with the most rigorous safety standards but is also designed to integrate seamlessly into your home’s heating system.
Addressing Common Objections
Cost Concerns: While the initial investment might seem higher than some alternatives, consider the long-term savings in terms of durability, efficiency, and reduced maintenance. The lifetime warranty is a significant indicator of the product's long-term value.
Installation Worries: Many customers express concern about the complexity of chimney relining installation. However, the 904L Mi-FLEX is designed for a user-friendly, top-down installation, which simplifies the process substantially. Optional accessories are available to enhance the ease and security of installation further.
Fuel Compatibility: Whether your heating system relies on gas, oil, or a variety of solid fuels, the multi-fuel design of the flue liner ensures comprehensive compatibility, making it an ideal choice for diverse applications.
Quality Assurance: With both HETAS and CE certifications, this product meets strict industry safety and quality standards. This is a compelling reassurance for homeowners who prioritise the safety and compliance of their heating installations.
Optional Accessories
To further optimise the performance of the 904L Mi-FLEX flue liner, we offer a range of optional accessories. These accessories are specifically designed to ease the installation process and ensure a flawless fit within your chimney. They enhance the structural integrity of the installation and can be a worthwhile investment for those seeking an even more secure and efficient system.
Final Thoughts and Purchasing Decision
In summary, the 904L Mi-FLEX 300mm x 1m CUT LENGTH flue liner stands as a premium solution for relining masonry chimneys. It combines cutting-edge materials, innovative design features, and rigorous safety approvals to deliver a product that not only meets but exceeds industry expectations. With its unmatched durability, exceptional performance across various fuel types, and a lifetime warranty when paired with Screw-FIX accessories, you are investing in a product that offers both reliability and long-term value.
The detailed design and flexible nature of this liner ensure that your chimney will not only function optimally but will also comply with the highest safety standards. Whether you are upgrading an existing system or embarking on a new installation, the 904L Mi-FLEX is engineered to provide peace of mind and lasting performance.
Its user-friendly installation process, combined with robust quality certifications, makes it a standout choice for homeowners and professionals alike. With National Flues, you are backed by a company that prides itself on delivering superior products with exceptional support and nationwide service.
Add to cart now or call 01670 206 999.
Upgrade your chimney system today—add to cart or call 01670 206 999.
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