What is flue?

  • (noun): A conduit to carry off smoke.
    See also — Additional definitions below


A flue is a duct, pipe, or chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors. In the United States, they are also known as vents and for boilers as breeching for water heaters and modern furnaces. They usually operate by buoyancy, also known as the stack effect, or the combustion products may be 'induced' via a blower. As combustion products contain carbon monoxide and other dangerous compounds, proper 'draft', and admission of replacement air is imperative. Building codes, and other standards, regulate their materials, design, and installation.

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Some articles on flue:

Flue-gas Desulfurization
... Flue-gas desulfurization (FGD) is a set of technologies used to remove sulfur dioxide (SO2) from exhaust flue gases of fossil-fuel power plants, and from the emissions of other sulfur ...
Blastpipe - History
... The locomotives at the time employed either a single flue boiler or a single return flue, with the fire grate at one end of the flue ...
Stack Effect in Flue Gas Stacks and Chimneys
... The stack effect in industrial flue gas stacks is similar to that in buildings, except that it involves hot flue gases having large temperature ... Furthermore, an industrial flue gas stack typically provides little obstruction for the flue gas along its length and is, in fact, normally optimized to enhance ... Large temperature differences between the outside air and the flue gases can create a strong stack effect in chimneys for buildings using a fireplace for heating ...
Curing Of Tobacco - Methods - Flue
... Flue-cured tobacco was originally strung onto tobacco sticks, which were hung from tier-poles in curing barns (Aus kilns, also traditionally called oasts) ... These barns have flues which run from externally fed fire boxes, heat-curing the tobacco without exposing it to smoke, slowly raising the temperature over the course of the curing ... Smith Tobacco Barn is an example of a traditional, flue-cured tobacco barn ...
... Flue-types include Balanced flue Power flue Die flue. ...

More definitions of "flue":

  • (noun): Organ pipe whose tone is produced by air passing across the sharp edge of a fissure or lip.
    Synonyms: flue pipe, labial pipe
  • (noun): Flat blade-like projection on the arm of an anchor.
    Synonyms: fluke