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 a twin wall flue system, certainly if you do not have a brick chimney stack. Twin wall systems can be constructed to produce a safe chimney system for your appliance.

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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 50 mm more than the inside diameter. So a 150 mm mm pipe has an outer diameter of 200 mm.

We have a wide selection of Insulated Flue Systems in 5 (130 mm), 6 (150 mm), 7 (180 mm) and 8 (200 mm) inch pipes, including twin wall insulated flue pipes, cowls, flashing and bends to ensure you can build a complete twin wall flue system.

All our pipes are supplied with the necessary locking bands free of charge, meaning you'll never forget them!

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 either use our online twin wall calculator. Or you can send 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 twin wall flue system.

Dinak double wall pipes and black powder double wall pipes are fully interchangeable.

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Installing twin wall flue through the house

Below you can see the installation in 3 dimensions. You can rotate the parts with the left mouse button pressed in.

You need to chose whether the oven has a top - or a back connection. Also you need to indicate whether the ceiling is made of wood or of stone/concrete.

Alle connections (with a circlel around them) can be opened by manouvring between the + and the -. X makes you return to the starting situation.

Passage of the roof

Flue through flammabe (wooden) floor

Flue through stone/concrete floor

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