PRINCIPLES OF CONSTRUCTION - FIREPLACE AND FLUES
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CITY AND GUILDS 600 SERIES PRINCIPLES OF CONSTRUCTION FIREPLACE AND FLUES TASK 1 Terminology 1) FLUE - The flue is the void or passageway through which the products of combustion are removed from the fire to the outside. 2) CHIMNEY - A chimney is the structure surrounding one or more separate flues. 3) FLUE PIPE - A flue pipe is a single skin metal pipe used to connect a fire or appliance to a chimney. 4) FLUE LINER - The flue liner is the material used to form the flue within the chimney. Flue liners can be of fire clay, refractory quality concrete or metal (usually high grade stainless steel). How a flue works. A flue is basically a column of hot air and gases, which is lighter than an equivalent column of cold air outside. Flues should ideally be vertical. If an offset is necessary, it should be as near vertical in angle as...

