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

Interesting temperature changes and the hope of early spring can mess with us as we wait until the end of the cold season. With the erratic weather this time of year, it’s vital to make sure that your furnace service is done and that your furnace is set for any weather swing. Part of having and using a furnace is understanding the system and knowing when it might need repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is an important measurement to note and can disclose to you what kind of effectiveness you can anticipate from your system. If you are unaware of your AFUE, this percentage can be clarified at your next furnace tune-up appointment from one of our experts at Controlled Comfort HVAC 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 littler its AFUE will also be. This means not as much energy efficiency compared to a new furnace each winter when your system is in use.
  • Think about your AFUE percentage in relation to money – if your AFUE is 75%, that means that for every $100 you devote to heating your home, only $75 is taken to heat your home.

Considering the age of your furnace and the possibility of overspending on your heating costs has hopefully given some insight into the weight of your furnace’s AFUE. There are many elements that go into choosing a new furnace or remaining with your furnace service plan. Over time however, lower efficiency levels can radically influence your energy usage, monthly bills and ease. Don’t ignore the AFUE rating of your furnace and reflect on it when deciding whether it’s time for furnace replacement.

If you have any further uncertainties about furnaces, or you just want some help verifying the AFUE rating of your existing furnace, give our specialists at Controlled Comfort HVAC Inc a call at 224-412-8308.

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