flue
noun
[ fluː ]
• a duct for smoke and waste gases produced by a fire, a gas heater, a power station, or other fuel-burning installation.
• "no air rises up the chimney, usually because the flue is blocked"
Similar:
duct,
tube,
passage,
channel,
canal,
conduit,
shaft,
air passage,
airway,
vent,
well,
funnel,
chimney,
chimney stack,
smokestack,
pipe,
pipeline,
outlet,
inlet,
Origin:
late Middle English (denoting the mouthpiece of a hunting horn): of unknown origin. Current senses date from the late 16th century.