Flue

A flue is a pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors. Historically the term flue meant the chimney itself. In the United States, they are also known as vents for boilers and 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.

Back to Maintenance & Safety →

Source: Wikipedia · Image: Wikimedia Commons · Public domain

WARMINGHOME

A warmer home — heating systems and heat pumps, insulation and efficiency, and the calculators that keep every room cozy.

Get new guides by emailOccasional emails. No spam. Unsubscribe anytime.

InformationAbout Contact Privacy Policy Terms of Service Disclaimer Affiliate Disclosure Cookie Policy

Every species, image, fact, and figure is drawn from Wikipedia and Wikimedia Commons, used under public-domain and Creative Commons licenses. No content is AI-generated.