Twin Wall Flue System

Twin Wall Flue: The Perfect Solution for Safe and Efficient Smoke Venting

Are you looking for a heating solution for your burner that lacks a brick chimney? Look no further! Flue-Pipes.com offers a top-tier twin wall flue system to ensure a safe outflow of smoke.

What is a Twin Wall Flue?

A twin wall flue is a double-walled flue pipe with insulation between the layers, designed to safely vent combustion gases from wood, coal, gas, and oil burners. Twin wall flues are incredibly versatile and can be installed as the main outflow pipe, going through standard walls, floors, or roofs. This makes twin wall flues ideal for buildings without a traditional brick chimney.

TWIN WALL FLUE PRODUCT GUIDE

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Benefits of Twin Wall Flues

• Versatile Installation: A twin wall flue can be installed vertically or horizontally, making it easy to adapt to your building's structure. Whether it’s through walls, ceilings, or roofs, twin wall flue systems can accommodate various designs.

• Suitable for Multiple Fuels: Our twin wall flue pipes are compatible with wood, coal, gas, and oil burners, as well as biomass boiler installations.

• Highly Customizable: A twin wall chimney flue can be customized for your specific needs and is available in stainless steel or black to fit your building’s aesthetic.

• 25-Year Warranty: Our twin wall flue kits come with a 25-year warranty, ensuring long-term performance and reliability.

At Flue-Pipes.com, we have a vast collection of high-quality chimney parts that aren’t only affordable but also durable. Our twin-wall flue kit, in particular, is of a European standard, class 1, and can used across many common appliances: 

• Wood 

• Coal

• Gas 

• Oil 

The stainless steel finish makes it also perfect for biomass boiler installations and is as safe as for other uses.

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

You can choose between a twin-wall flue black or a twin-wall flue stainless steel system that you can use interchangeably. With 25mm of insulation, the double wall flue pipe ensures the passage of gases through the top of the chimney instead of releasing them into the vents whilst preventing condensation. 

A twin-wall insulated flue pipe system comes in 5- and 6-inch long pipes that include:

• Twin-wall insulated flue pipes

• Cowls

• Flashing

• Bends 

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

Design the Best Twin-Wall System with Flue-Pipes.com

Flue-Pipes.com accepts your twin-wall system projects and completes them with customised double-sized flue pipes. Send us your diagram with exact dimensions to info@flue-pipes.com or fill out a free Flue Design Service Form. 

Our professional technicians will evaluate your project and send you a complete quote for your twin-wall flue system as soon as possible. 

Twin-Wall Chimney Flue Essentials

There are a few things to remember when it comes to designing and installing your twin-wall flue system. We do our best to educate buyers and assist them before and after purchasing our twin-wall flues.

First, the flue should remain as straight as possible and be high enough to ensure sufficient draught to clear the products of combustion. The height necessary for this will depend upon the type of appliance, the height of the building and the number of offsets within the system. However, a minimum flue height of 4.5 metres should be achieved as recommended in the Building Regulations.

Where it is not possible to construct a vertical chimney, Building Regulations dictate that no part of a chimney should form an angle greater than 45° from the vertical. Except where it may be necessary to use a very short horizontal section (not exceeding 150mm) of the flue to connect the chimney to a back outlet appliance, this can mean a 90° elbow is necessary. 

Where the flue passes through a combustible floor or ceiling, an air gap clearance, as per the manufacturer's installation instructions, must be maintained. 

In multi-fuel applications and where the flue gas temperature is greater than 250°C, the ventilated fire stop and ventilated support components must be used at the bottom and top of the shaft. 

For oil and gas applications where the flue gas temperature is below 250°C or where the chimney passes through a non-combustible floor, the standard fire stops and support components can be used. 

Twin Wall Flue Installation

Go to our installation guides

Chimney linerFlue pipe

Click here for more info on flue regulations.

Find the right type of Flue here 

You may also want to know:

• What is a twin-wall flue system?

  A twin-wall system is designed to be installed through roofs and floors with both indoor and outdoor flues. Twin-wall flues are commonly used for burners that don’t have brick chimneys and serve as a safe and long-lasting solution to release the gases from the burner. 

• Are twin-wall flues hot to the touch?

  A twin-wall insulated flue pipe is safe to install inside the home – however, the outside flue pipe can get hot. At the same time, the stainless steel layer reduces the heat but not by much.

• Are your twin wall flue pipes compatible with twin wall flue pipes from other brands?

  No they can not be combined with twin wall flue pipes from other brands. Each brand has diffferent specifications, diameters, and locking bands. All our flue pipes are of the Jeremias brand; including single wall pipes. Our pipes can not be connected to pipes from other brands ( like Dinak, Duraflue and others)

• Do I need a wall sleeve with twin-wall flue?

  Building Regulations may require the homeowner to use a wall sleeve when installing a twin-wall flue pipe through the wall. A metal sleeve will prevent the pipe from expanding from heat and, thus, won’t damage it.

• Which diamaters of twin wall flue are available?

              Our flue pipes have the following internal and external diameters:

  1. Internal diameter 100mm; external diameter 150mm
  2. Internal diameter 125mm; external diameter 175mm
  3. Internal diameter 150mm; external diameter 200mm
  4. Internal diameter 175mm; external diameter 225mm
  5. Internal diameter 200mm; external diameter 250mm