picture of a man lowering his heating bill by learning about AFUE

Furnace Service, AFUE and What They Mean for You in South Beloit and Belvidere

Interesting temperature changes and the expectation of early spring can keep us holding out as we wait until the end of the cold season. With the erratic weather this time of year, it’s vital to ensure that your furnace service is complete and that your furnace is set for any weather change. Part of owning and utilizing a furnace is being familiar with the system and knowing when it might require repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is a central measurement to note and can disclose to you what kind of efficiency you can anticipate from your system. If you are not informed of your AFUE, this percentage can be determined at your next furnace maintenance appointment from one of our professionals at Fleming Heating & Air Conditioning Inc..

So, what does this AFUE rating mean for you? What types of things should you take into account with AFUE?


  • The older your furnace is, the smaller its AFUE will also be. This means reduced energy efficiency than with a new furnace each winter when your system is in use.
  • Consider your AFUE percentage proportionate to money – if your AFUE is 75%, that means that for every $100 you devote to heating your home, only $75 is spent to heat your home.

Bearing in mind the age of your furnace and the possibility of overspending on your heating costs has hopefully given some insight into the significance 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 still, smaller efficiency levels can significantly effect your energy usage, monthly bills and coziness. Don’t ignore the AFUE rating of your furnace and consider it when determining whether it’s time for furnace replacement.

If you have any further questions about furnaces, or you just want some help verifying the AFUE rating of your existing furnace, give our experts at Fleming Heating & Air Conditioning Inc. a call at 877-389-2465 or arrange an appointment with us online.