Flexible flue and chimney liners

Flexible flue and chimney liners designed for lining an existing flue or chimney.

TecnoFlex Plus is a twin skin flexible chimney liner designed for gas, oil and multi-fuel, where the maximum flue gas temperature does not exceed 600°C. Diameter range 80 – 300mm.



Flexible Flue Twin Wall Liner

  • Corrugated outer skin for high crush resistance.
  • Extra smooth inner skin allows for easy drain down of condensates, less opportunity for soot to collect in the joint area and ease of sweeping.
  • Engineered joint design gives extra strength and flexibility.
  • Inner skin remains smooth and protective even after the rigours of installation.
  • Now with Lifetime*Guarantee.

Technical Specification

  • Both inner and outer layers made from corrosion-resistant 316L stainless steel.
  • 904L stainless steel is also available as an option.


Tecnoflex Plus is designed for gas, oil and multifuel, where the maximum flue gas temperature does not exceed 600°C. Diameter range 80 – 300mm.

Components & Systems

Tecnoflex Plus is available for all diameters: 80, 100, 120, 125, 150, 155, 180, 200, 230, 250 & 300mm as cut lengths. When ordering state Product Code followed by Diameter. eg. a 9m carton of 180mm Tecnoflex Plus is TPB09180.

Packs containing the cut length with clamp plate and nose cone are also available for 120, 125, 150, 155, 180 & 200mm diameters. When ordering state Product Code followed by Diameter.
eg. a 12m pack of 150mm Tecnoflex Plus is TPF12150.

Unique Tecnoflex Plus Screw Fit Adaptors & Terminals

TecnoFlex Plus is the leading twin skin flexible chimney liner designed to work with wood burning and solid fuel stoves.

  • Unique screw fit action
  • A range of 3 terminals
  • Available in 316L and 904L variants
  • Single strip design and joints engineered for greater strength
  • Meter length markers
  • Diameter range 120, 125, 150, 155, 180, 200mm
Tecnoflex Plus Installation Kits

Traditional & Pot Hanger Options

Traditional Kits

The Traditional Installation kits are based around the traditional fitting method of clamp and plate at the top of the existing masonry stack.

Pot Hanger Kits

The Pot Hanger Kit where the flex liner is suspended from an existing chimney pot. The new kits also include the latest TecnoFlex Plus installation instructions as well as the Chimney Notice Plate as required by the new CE norms.

Flex Tester Kit

The Flex Tester Kit is specifically designed to help the installer ensure that there are no hidden snags before installing the full length of chimney. The test length is 1.5m long to allow for offsets, and the kit includes a screw fit nose cone at each end, to which a cord can be attached, making it easier to pull up and down the chimney.


Lifetime Guarantee

We are confident in our products and so offer you (the owner) a generous guarantee in relation to the flexible liner system (the System). Provided that you comply with the conditions stated below, we guarantee to you that the System will be free from defects for whichever is the greater of:

  • A period equal to the warranty period of the appliance to which the Liner is first connected; or
  • 20 years.

The conditions of the guarantee are:

  • Correctly sized and installed in accordance with the manufacturer’s instructions, current Building Regulations and relevant British and European standards.
  • Maintained correctly by a qualified and competent person and maintenance records kept updated for both appliance and chimney/chimney liner.
  • Used in combination with an appliance burning only approved fuels in accordance with Schiedel Chimney Systems and the appliance manufacturer’s instructions.
  • Register your product within 30 days of installation and provide us with any evidence we reasonably request to prove that your System has been fitted by a HETAS approved installer or if not, has been signed off by a Building Control Inspector prior to use.
  • Familiarise yourself with the User Guide and comply with its provisions in full during the lifetime of your usage of the Liner (including by keeping the required records safe).

Failure to do so will invalidate any guarantee claim.


Exciting news from Schiedel Chimney Systems for Stove and Chimney Installers!

Whenever you register an installation with our easy to use, online guarantee registration portal, you will now accrue points based on the number of installations and installation type.

Once you have reached a minimum of 25 points, you can begin to redeem them for £25 Love2Shop vouchers.

So start to register your installations, taking full advantage of our Lifetime Guarantee on Flex and ICID, as well as guarantees on all our other ranges, and to start earning points 🙂

Please note that points are allocated based on different types of installations, as well as different stages. The below stages give a guide on points when you are registering an installation.

Schiedel Connecting Flue Pipe
Schiedel Connecting Flue Pipes (Prima Smooth & Prima Plus, ICID Plus, ICS) – 1 Point

Schiedel Chimney Liners
Schiedel Flexible Flue Liners (TecnoFlex Plus & Triple Lock) – 1 Point
Schiedel Mineral Chimney Liners ( Pumice, Ceramic) – 2 Points
Schiedel Single Wall Flue Liners (Prima Plus, Prima Smooth) – 2 points

Schiedel System Chimneys
Schiedel System Chimney (B Vent, Prima Plus) – 2 Points
Schiedel Stainless Steel System Chimneys (ICID Plus, ICS) – 3 Points
Schiedel Mineral System Chimneys (DM, Swift, Swift Air, Absolut) – 3 Points

You are also allocated 1 point if the installation is single-storey and 2 points for multi-storey.


940002170 Flexible Liners / Flue Boxes Brochure

940002170 Flexible Liners / Flue Boxes Brochure

3.70 MB

940002172 Flex Liners / Flue Boxes Installation Instructions

940002172 Flex Liners / Flue Boxes Installation Instructions

3.12 MB




Tecnoflex DOP and Approvals

Tecnoflex DOP and Approvals

2.81 MB

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