Flexible Flue Liners (UK) – Schiedel Tecnoflex 316/904
EN1856-2 certified stainless steel flexible liners for wood-burning & multi-fuel stoves. Fast UK delivery, expert guidance, and trade pricing.
EN1856-2 Certified
Solid-fuel rated
Solid-fuel rated
Fast UK Delivery
Project-ready logistics
Project-ready logistics
HETAS-Led Advice
Talk to specialists
Talk to specialists
Overview: What Flexible Flue Liners Do
Flexible flue liners safely connect new solid-fuel appliances to existing masonry chimneys. When sized correctly, they improve draft, help reduce tar/creosote build-up, and vent combustion gases effectively.
Rule of thumb: match the liner diameter to your stove outlet. For example, a 150 mm (6") outlet typically uses a 150 mm liner.
At a Glance: 316L vs 904L
| Grade | 316L | 904L |
| Best for | Wood-burning | Multi-fuel / higher acidity |
| Common diameters | 125 mm, 150 mm (check stove spec) | |
| Construction | Single or double skin (variant-dependent) | |
Why Schiedel Tecnoflex?
- Premium stainless steel: choose 316L for wood-burning; 904L for multi-fuel/heavier acidity.
- Smooth internal surface: helps resist soot accumulation during and after installation.
- Robust outer corrugation: better crush resistance when pulling through bends.
- Length options: typically 5 m to 40 m for retrofit chimneys.
- Matched components: screw-fit terminals, connectors, plates, and cowls for a gas-tight system.
Schiedel Screw-Fit Accessories
These components make installation easier and seal joints gas-tight. From the top down, consider:
- Rain cap / terminal – screw-fit options interconnect perfectly with Tecnoflex liners.
- Flexi-to-stove connector – the critical, heat-exposed joint to your stove pipe.
- Adapters & increasers – for diameter changes or joining to twin-wall sections.
Stove-to-liner adapters |
Register plates |
Chimney cowls & terminals |
Stove pipe
How to Choose the Right Liner
- Select grade: 316L (wood-only) or 904L (multi-fuel / smokeless fuel).
- Match diameter: usually 125 mm or 150 mm — follow manufacturer guidance.
- Measure height: total chimney run plus allowance for fittings.
- Plan the route: note bends/offsets and choose the correct adapters, top plate, clamp and cowl.
- Install to standards: EN1856-2 and the appliance manual; consider a HETAS installer.
Flexible Flue Liners — FAQs
What are Tecnoflex flexible flue liners made from?
Corrosion-resistant stainless steel (316L, with 904L variants). Selected models are double-skin for greater strength and longevity.
Are they suitable for wood-burning and multi-fuel stoves?
Yes. Tecnoflex liners are high-temperature solid-fuel rated, improving draft and helping reduce tar/creosote build-up.
Do Tecnoflex liners meet UK/EU standards?
Yes. They are certified to EN1856-2 for solid-fuel applications.
Which diameter should I choose?
Match your stove outlet (commonly 125 mm or 150 mm) unless the manufacturer specifies otherwise.
Stoves
Bio Ethanol Fires
Beams
Fireplace Surrounds
Hearths
Fireside Services
Logs For Wood Burner
Outdoor Living
Instant Quote
Contact Hot Box®