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Kilowatt Heating, Air Conditioning and Electrical Blog

Why Do Furnaces Need an Exhaust Flue?

Furnaces generate a great deal of heat, but part of producing this heat involves the creation of noxious fumes. These fumes need to be vented safely from your home, and the way to do this is via an exhaust flue. An exhaust flue that is improperly installed can be very dangerous, which is why it’s important to hire professionals for any kind of heating work you may need. Kilowatt has been serving the Los Angeles area for over 20 years, and our trained technicians can handle any heating issue you may have, so call us today.

Removing the Noxious Gases

The component responsible for the warm air that blows into your home is the heat exchanger. The heat exchanger is a metal tube that is open at both ends. Air is heated, and during this process, noxious gasses such as carbon monoxide, nitrogen dioxide, and sulfur dioxide, are created and trapped in the inner part of the tube. These gasses are vented directly out of the tube into the flue, where they can be safely expelled from your home.

Common Problems with Exhaust Flues

As with any other component of your heating system, your exhaust flue can develop some problems:

  • Backdrafting – this is one of the more serious problems that can develop with your flue. Backdrafting refers to a situation in which the exhaust fumes are sucked back into your furnace, where they can be blown into your living spaces. The main causes for backdrafting are negative indoor air pressure or problems with the exhaust fan.
  • Cracking – not only does the flue vent noxious fumes, it also removes small amounts of soot, and acidic water vapor can develop as the heated air cools. These things can lead to corrosion of the metal, which can cause the metal to crack.
  • Leaking between joints – the flue pipe has sections, and the area where the sections are joined is known as a joint. Joints can leak, which allows gasses to escape.

Your flue is an important part of your heating. If you suspect you may have a problem with it, call Kilowatt and schedule heating service in Los Angeles with one of our technicians.

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