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904L Mi-FLEX 100mm x 1m CUT LENGTH (36Z-100-1)

National Flues presents the 904L Mi-FLEX 100mm x 1m CUT LENGTH, a premium flexible flue liner designed for modern chimney relining needs. Crafted from high-quality 904L stainless steel, this versatile liner ensures excellent performance, reliability, and safety while supporting a range of fuels. Enhance your chimney’s efficiency with this innovative, multi-fuel compliant system, ideal for both residential and commercial applications.
The price you pay today £57.99
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At a Glance

    Premium 904L grade stainless steel construction
    Double-skinned flexible design
    Compatible with multiple fuel types including gas, oil, coal, coke, and smokeless fuels
    HETAS approved and CE certified for superior safety standards
    Lifetime manufacturer’s warranty when used with Screw-FIX accessories
    Easy installation with a clear top-fit design and guiding arrows
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 1st. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days then please 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 and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. 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.

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.

Have Questions?
Phone: 01670 206999
Email: [email protected]

Introducing the 904L Mi-FLEX 100mm x 1m CUT LENGTH Flexible Flue Liner, an exceptional choice for relining masonry chimneys. Crafted from high-end 904L grade stainless steel, this double-skinned liner is durable and resistant to corrosion. The smooth inner lining ensures optimal gas flow efficiency and ease of installation.

This versatile liner is suitable for various fuels, including gas, oil, coal, coke, cured dry logs, cured dry peat, and approved smokeless fuels. Adhering to the highest standards, it is both HETAS and CE approved. Installation is straightforward: sweep your chimney, check your pot condition, and ensure proper passage.

Fit from the top with the arrows pointing upwards for the best results. For solid fuel appliances, frequent maintenance, including annual chimney sweeps, is recommended.

SKU: 36Z-100-1

Technical Specifications
SKU36Z-100-1
Size100mm x 1m (CUT LENGTH)
Material904L grade stainless steel (0.105mm thick inner & outer)
Fuel CompatibilityGas, Oil, Coal, Coke, Cured Dry Logs, Cured Dry Peat, Smokeless Fuels
Seam TypeOmega-Lock
ManufacturerMi-Flues Ltd
ApprovalsHETAS, CE
WarrantyLifetime (with Screw-FIX accessories)
Begin by sweeping your chimney thoroughly and inspecting the pot condition. Fit the liner from the top with the arrows pointing upwards to ensure proper alignment. Use the provided Nose Cone attached to a guiding string to aid a smooth descent of the liner. Remember to schedule regular chimney maintenance, including annual sweeps, especially when used with solid fuel appliances. If you are uncertain about any step in the installation process, seek professional guidance for optimal results.

Yes, the 904L Mi-FLEX flue liner is suitable for gas, oil, coal, coke, cured dry logs, cured dry peat, and approved smokeless fuels.

Absolutely! The 904L Mi-FLEX flue liner is both HETAS approved and CE certified, ensuring it meets the highest safety and performance standards.

The inner lining is 0.105mm thick, providing durability and resistance to corrosion.

For solid fuel appliances, chimneys should be swept and maintained at least once a year or as frequently as necessary.

Installation is straightforward but requires careful preparation and adherence to guidelines like sweeping the chimney and checking the pot condition. Assistance from a professional is recommended for best results.

The Nose Cone helps guide the flue liner down the chimney smoothly. It is attached to a string and the flue liner, facilitating easy installation.

Yes, the liner carries a lifetime manufacturer's warranty when installed with Screw-FIX accessories, ensuring peace of mind and longevity.

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