Flue

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Definition

A duct or pipe through which exhaust gases from a fireplace, stove or boiler are released to the outdoors.

Things you need to know

Flues can be opened and closed. Leaving them open too wide will draw the warm inside air up the chimney, wasting heat and making the room colder.

Also known as

Vents (boilers), Breeching (water heaters and modern furnaces)