Furnace Service, AFUE and What They Mean for You in Saint Charles

Strange temperature changes and the desire for early spring can keep us holding out as we wait until the end of the winter season. With the random weather this time of year, it’s crucial to double check that your furnace service is taken care of and that your furnace is set for any weather swing. Part of owning and using a furnace is understanding the system and preparing for when it might need repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is a central measurement to recognize and can tell you what kind of effectiveness you can anticipate from your system. If you are not informed of your AFUE, this percentage can be clarified at your next furnace tune-up appointment from one of our experts at Air Alliance Team.

So, what does this AFUE rating indicate 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 less energy efficiency compared to a new furnace every 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 spend on 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 understanding into the weight of your furnace’s AFUE. There are many things that go into selecting a new furnace or remaining with your furnace service plan. Over time however, lower efficiency levels can radically impact your energy usage, monthly bills and comfort. Don’t ignore the AFUE rating of your furnace and reflect on it when choosing 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 present furnace, give our specialists at Air Alliance Team a call at 636-229-1544.

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