Flue

A number of pollutants are required to be filtered out from the flue gas of power plants before it can be exhausted to the atmosphere.

The chimney flue is currently blocked by a bird's nest. We'll need to call a chimney sweep to clean it out before we can safely use the fireplace.

A squirrel was trapped in the flue above the fireplace.

Matthew picked up a flue in Casablanca.

It has frequently been a subject of inquiry, whether the ancients were acquainted with chimneys, or open fire-places. In the houses discovered at Herculaneum and Pompeii, there are no chimneys; they all appear to have been warmed by furnaces and flues.

Besides the usual run of machines, planers, millers, automatics, centre lathes, cranes, etc., there were several power stations, the rolling mills for strip material and for 60 ft. rails, and all the steel furnaces with their complicated systems of flues. If variety is the spice of life, then there was plenty here.