The terms flue and chimney are often considered the same but the flue is actually the working component of the chimney that helps convey the products of combustion safely out into the atmosphere. A flue actually works under negative pressure.
There are many different materials used to make a flue, such as stainless steel, pumice, concrete, ceramic, plastic and clay. Plastic flues are only used for low temperature condensing applications.

There are five different types of flue. Below they are explained in more detail:
Class 1 Flue: The most commonly used flue that is 7 inches in diameter. Found in properties where there are conventional chimneys and homes that may have had an open coal fire in them at one time. Most of the gas fires on the market today will fit perfectly into a Class 1 flue and ones that have a high heat output require a 7 inch flue.
Class 2 Flue: Smaller in diameter at 5 inches and so the number of gas fires that suit this type of flue are reduced.
Pre-cast Flue: More modern properties have this form of flue. It is made from blocks that fit into the cavity of an outside wall of the property. In some properties they are fitted into a small chimney breast but the flue will actually run up the side of the property.
Balanced Flue: Used for glass fronted fires as it has two layers. One to draw air into the fire and the other layer will discharge carbon monoxide outside into the air.
Power Flue: These types of flue are used at properties that have no chimney and are fitted to an outside wall. They are used for inset open gas fires that have no glass front. Power flues need a connection to electricity.

Due to flues being working components of chimneys there are many parts and accessories that come with them. We sell a vast range of accessories needed to keep your flue in working order, in stock today and at great prices. We can professionally install all flue systems and our team are highly qualified to complete the job to the highest possible standard.

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