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

Strange temperature changes and the desire for early spring can let us down as we wait until the end of winter. With the unpredictable weather this time of year, it’s vital to make sure that your furnace service is taken care of and that your furnace is set for any weather swing. Part of owning and operating a furnace is knowing the system and preparing for when it might call for repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is a significant measurement to recognize and can disclose to you what kind of effectiveness you can expect from your system. If you are unaware of your AFUE, this percentage can be clarified at your next furnace maintenance appointment from one of our specialists at .

So, what does this AFUE rating indicate for you? What kinds 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 in the winter when your system is in use.
  • Compare 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 being used 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 weight of your furnace’s AFUE. There are many factors that go into picking a new furnace or remaining with your furnace service plan. Over time still, decreased efficiency levels can drastically impact your energy usage, monthly bills and comfort. Don’t disregard the AFUE rating of your furnace and consider it when deciding 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 current furnace, give our experts at a call at 815-410-1128.

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