Chimneys & Flue Systems for Gas Stoves & Fires

Chimneys & Flue Systems for Gas Stoves & Fires

Before you choose your new gas stove or fire, you will need to know what type of chimney (if you have one) or flue you have. Which type of chimney or flue that is available usually dictates your choice of stove or fire. To help you understand which gas stoves or fires are suitable for your home, please use the information on this page to identify your property's chimney or flue. Please note that this only a guide, you must speak to your Gazco retailer for further information and advice before purchasing your gas stove or fire.

Once you have identified your chimney and/or flue (or confirmed you do not have one), take note of the logo below that represent this, as the logo has been used throughout the website to represent the gas stoves or fires which are suitable for installation in your home.

Today, it is not a necessity to install a gas fire or stove into a traditional chimney setting with a conventional flue; many gas fired appliances offer you the option of a balanced flue system which will exit discreetly from your property via a twin-wall pipe.

Conventional Flue

Conventional flue systems are easily recognisable as either a conventional brick or stone chimney, pre-fabricated or pre-cast chimney system. Should your home have none of these at present, it is usually possible to have a pre-fabricated system installed in your home if required.

Brick/Stone Chimney (Class 1)

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The chimney 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 heating air to expel the products of combustion up your chimney.

Pre-fabricated Flues (Class 1 & 2)

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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)

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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)

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Balanced flues work in conjunction with Gazco’s Glass Fronted gas stoves or 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 stove or fire selected, the twin-walled pipe may exit horizontally through an external wall or vertically through the roof.

Powered Flue (No chimney required)

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A powered flue uses an extractor unit mounted to vent the combustion gases directly outside. This means that your gas stove or fire does not have to be installed against an external wall, so it can be located in more rooms around your home. A mains electricity supply is needed to operate this system.

Electric Stoves & Fires (No chimney required)

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Using Gazco’s unique Veriflame™ technology, Gazco has created a beautiful range of electric stoves and electric fires that provide a versatile and stunning focal point for any home-all without the need for a chimney!

All electric stoves and fires run on a standard 13amp plug.

No Air Vent required (UK)

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All stoves shown with this symbol, boast the advantage of not normally requiring an air vent* where the air permeability is greater than 5.03m/hr/m2.

*Requirements in the Republic of Ireland are different.