Free Delivery over £100+ 5on Trustpilot Browse our popular stoves Fast Mainland UK Delivery Buy stoves with install packs Call 01670 206 999 for help

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. Read more...
Now only £44.99
Give us a call if you find it cheaper and we'll normally price match.
  • Fast deliveryFriday, November 14th*
  • Best PriceCall us to beat any price you found online.
  • Secure checkoutCard· Google/Apple Pay· Klarna· Paypal
Payment Options

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

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: sales@nationalflues.com

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

Delivery Information* +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Friday, November 14th. This is based on current lead times. Bear in mind that it is a busy time of year. If you need a product delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. Visit our Shipping Information page for more information.

About National Flues Ltd +

We began over 30 years ago as a fireplace shop in the North East. We now supply hundreds of trade professionals and thousands of retail customers, all across the UK, every month. We are still a family owned business, lead by the MD Neil, and always try our best to deliver the best possible experience. We also price match, so give us a call if you find this cheaper and want to buy from us. Visit our about us page to read a bit more.

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.

 

Call the Experts   8am-5pm
👀 5 people watching this