Chimney and Flue types

The type of chimney or flue you have usually dictates your choice of fire.

To help you understand which fires are suitable for your home, please use the information on this page to identify your chimney.

Don't worry if you don't have a chimney though, you can still find the perfect fire for your home.

Chimney and Flue types suitable for each appliance is referenced on the relevant product page.

Brick/Stone Chimney (Class 1)

brick stone chimney

Conventional chimneys are easily recognisable. the stack rises well above the roofline and is topped by a traditional chimney pot or gas terminal. This type of chimney relies on the natural circulation of heated air to expel the products of combustion up your chimney.

Pre-fabricated Flues (Class 1 & 2)

pre-fabricated flues

You will see a metal flue cowl on your roof. Some are all metal whilst others may terminate through a short rectangular pot (but without a chimney stack). These flues create the same circulation of heated air as a brick or stone chimney.

Pre-cast Flue (Class 2)

pre cast flue

Many modern homes have been built with such flues. You can readily identify them by either a metal flue cowl or a raised ridge terminal on your roof. The natural circulation of heated air expels the products of combustion.

These flues tends to be very shallow in depth so a slimmer fire is often required. Deep appliances however may be able to be installed with the use of either a spacer kit or deeper rebate into the fireplace.

Balanced Flue (No chimney required)

balanced flue

Balanced flues work in conjunction with glass fronted gas fires. The appliance is completely sealed from the room into which it is installed (so there are no draughts and heating efficiency is increased) and a twin-wall pipe vents directly to an outside wall.

Air for combustion is drawn in through the outer pipe whilst the inner pipe removes the combustion gases to the exterior of the property.

Depending on the fire selected, the twin-walled pipe may exit horizontally through an external wall or vertically through the roof. No electric supply is required; therefore there is no sound with a balanced flue system.

Powered Flue (No chimney required

powered flue

This works by coupling our externally driven flue system to the fire so that it expels the products of combustion through a flue to the outdoors. You can have up to three bends in the flue so the fire can be located in more rooms around your home. The fire does not necessarily have to be installed on an external wall.

Electric Fires (No chimney required)

electric flue

Gazco produce a selection of electric fires which do not require a chimney or flue of any kind.