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

316L Mi-FLEX 100mm x 44m COIL (35Z-100-44)

National Flues proudly presents the 316L Mi-FLEX 100mm x 44m Flexible Flue Liner Coil, a top-quality, dual-skinned stainless steel flue liner designed for modern and traditional masonry chimneys. This premium product, crafted from high grade 316L, ensures superior durability, excellent gas flow, and enhanced safety. Read more...
316L Mi-FLEX 100mm x 44m COIL
IN STOCK
Product Thumbnail
Product Thumbnail
Now only £993.99
including free delivery 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

  • Crafted from premium 316L stainless steel
  • Dual-skinned design with 0.105mm inner and outer layers
  • Compatible with a variety of fuels including gas, oil, coal, coke, dry logs, and peat
  • HETAS approved and CE certified for enhanced safety
  • Lifetime manufacturer''s warranty when installed with Screw-FIX accessories
  • Convoluted outer design for efficient gas flow and performance

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 316L Mi-FLEX 100mm x 44m Flexible Flue Liner—an exemplary dual-skinned flexible flue liner perfect for enhancing the functionality and safety of your masonry chimney. Expertly crafted from 316L grade stainless steel, this liner features a smooth inner wall and a durable convoluted outer layer, both 0.105mm thick. This robust construction ensures resilience and a smooth flow of gases, certified by HETAS and CE approved for peace of mind.

Installation is straightforward: always fit from the top, ensure the gas flow arrows point upwards and use a nose cone for easy insertion. Regular maintenance, such as sweeping, will ensure longevity, especially for solid fuel appliances. A fantastic addition to your home or trade project, this product is designed for use with gas, oil, coal, coke, dry logs, and peat.

SKU: 35Z-100-44

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.

This is us — real advice over the phone, or at the counter, and real stock in our warehouse.

Customer being served at the National Flues trade counter
Trade counter Installer collection & same-day help.
Team helping customers at the counter
Advice Real people on the phone to spec the right parts.
Friendly member of the team at the front desk
Here to help Friendly, straight answers from HETAS approved experts.
Warehouse shelves with boxed flue components being picked for dispatch
Warehouse Orders picked & dispatched nationwide.
Talk to the team Visit our trade counter
Technical Specifications
SKU35Z-100-44
Dimensions100mm x 44m coil
Material316L stainless steel (0.105mm thick inner & outer)
ApprovalsHETAS, CE
Fuel CompatibilityWood, Oil, Gas, Low sulphur coal, Coke, Dry logs, Peat
InstallationTop fitted with nose cone assistance
WarrantyLifetime (with Screw-FIX accessories)
For optimal performance, always install the liner from the top of your chimney. Ensure that the gas flow arrows are aligned upwards to facilitate the correct direction for exhaust gases. Use a nose cone to ease the process of insertion. Check that your chimney has been swept clean prior to installation. For solid fuel appliances, maintain an annual sweeping routine to uphold safety and extend the product's lifecycle. Always follow the manufacturer's installation guidelines closely to ensure a successful and safe setup.

The 316L Mi-FLEX flue liner is compatible with multiple fuels including gas, oil, coal, coke, cured dry logs, and cured dry peat.

Yes, it is HETAS listed and CE certified, which ensures it meets high safety and quality standards.

The liner should always be installed from the top of the chimney. Ensure the arrows point upwards (direction of gas flow) and use a nose cone for easy fitting.

Before installation, ensure the liner can fit down the chimney, sweep your chimney, and check that the pot is in good condition.

For chimneys serving solid fuel appliances, sweeping and maintenance should be carried out at least once a year to ensure safety and longevity.

Yes, it comes with a lifetime manufacturer's warranty when installed with Screw-FIX accessories.

The flue liner is constructed from a single strip of 316L stainless steel, bent at 180 degrees with a four-plane Omega-Lock seam for maximum reliability and performance.

 

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