Furnace Service, AFUE and What They Mean for You in Manassas

Curious temperature changes and the expectation of early spring can mess with us as we wait until the end of the winter season. With the random weather this time of year, it’s important to double check that your furnace service is complete and that your furnace is set for any weather swing. Part of having and operating a furnace is understanding the system and understanding when it might require repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is a central measurement to recognize and can tell you what kind of efficiency you can look for from your system. If you are not informed of your AFUE, this percentage can be clarified at your next furnace service appointment from one of our professionals at Twin Air LLC.

So, what does this AFUE rating mean for you? What kinds of things should you consider with AFUE?


  • The older your furnace is, the lower its AFUE will also be. This means not as much energy efficiency than with a new furnace each winter when your system is in use.
  • Think about your AFUE percentage with regard to money – if your AFUE is 75%, that means that for every $100 you use heating your home, only $75 is taken to heat your home.

Taking into account the age of your furnace and the potential of overspending on your heating costs has hopefully provided some understanding into the importance of your furnace’s AFUE. There are many factors that go into choosing a new furnace or remaining with your furnace service plan. Over time however, smaller efficiency levels can drastically influence your energy usage, monthly bills and comfort. Don’t ignore the AFUE rating of your furnace and think of it when deciding whether it’s time for furnace replacement.

If you have any further inquiries about furnaces, or you just want some help determining the AFUE rating of your existing furnace, give our professionals at Twin Air LLC a call at 703-754-1062 or arrange an appointment with us online.

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