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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. Read more...
Now only £360.99
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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

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

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

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-300-1
Model904L Mi-FLEX 300mm x 1m CUT LENGTH
Dimensions300mm x 1m (cut length)
Material904L stainless steel (0.105mm thick inner and outer layers)
Seam TechnologyOmega-Lock
Fuel CompatibilityGas, oil, coal, coke, cured dry logs, cured dry peat, smokeless fuels
ApprovalsHETAS, CE
WarrantyLifetime (with Screw-FIX accessories)
ProducerMi-Flues Ltd
• 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.

 

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