If you are installing a new heating appliance, such as a wood-burning stove, gas coal-effect fire or an oil boiler, you will probably need an insulated flue system, you certainly will if you do not have a brick chimney stack. Twin wall systems can be constructed to produce a safe chimney system for your appliance.

Twin wall flue pipes are  suitable for the creation of both indoor and outdoor flues and they can be used to pass through roofs and floors. Our double wall flues are suitable for use with wood, coal, gas and oil appliances. Our Twin wall flue system is also perfect for biomass boiler installations.

The outside diameter of twin wall flue pipes is 60 mm more than the inside diameter. So a 150 mm pipe has an outer diameter of 210 mm.

Our twin wall flue is a class 1 insulated  flue system manufactured in Europe. This double wall flue is suitable for use with wood, coal, gas and oil appliances. Made of stainless steel - the twin wall flue is also perfect for biomass boiler installations.

  • Push fit jointing system - secures using a locking band
  • 30-year warranty
  • 30 mm of insulation
  • The internal joint system prevents moisture draw through
  • HETAS listed for use in solid fuel applications

All our pipes are supplied with the necessary locking bands, free of charge.

A twin wall flue pipe is a metal tube (flue) insulated with approx. 12 inches of insulation (two layers of stainless steel with insulation between). Stainless and black powder-coated systems are fully interchangeable.

Insulation is necessary to keep the gases hot. If you were to use non-insulated flue pipe for the whole of your chimney, then the gases would likely cool too much and start to slow down rather than rising, with this causing the smoke underneath to “dam”. This might cause the smoke below to exit out of the vents in your stove instead of the top of your chimney.

Cooling gases also form condensation, which collects on the inner walls of the flue and runs down into the stove (mixed with soot it is a disgusting brown liquid).

We have a wide selection of Insulated Flue Systems in 5, 6, 7 and 8-inch pipes , including twin wall insulated flue pipes, cowls, flashing and bends to ensure you can build a complete twinwall flue system.

All our double-walled flues are fully approved by HETAS, and have the EN-1856-1 test certificate.

We can help you to design your system. You can send us a simple diagram, with dimensions to info@flue-pipes.com. A member of our trained technical team will answer with a complete quote for your double wall flue system.

To home page

What other people are saying about us:

Stove pipe customer

"Very good price!!"

"Easy to order; Good quality; Delivery next working day. Fab "
Steve Kemp -  Market Rasen

Stovepipe customer

"Loved the support"

"Very rapid delivery and well packed. All items in excellent condition. Thanks dad for the installation!"
Carolyn Mckinnon - Bath



6 inch stove pipe customer

"Easy job of just a few hours..."

"All well packed on time and unmarked and cheaper than anywhere on the web. "
H. T. Edwards - Birmingham


Rate this page

  • Leave a name and email adress if you wish to be contacted