Furnace Service, AFUE and What They Mean for You in Rapid City

December 31, 2015

Interesting temperature changes and the hope of early spring can keep us holding out as we wait until the end of winter. 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 prepared for any weather shift. Part of having and utilizing a furnace is understanding the system and preparing for when it might call for repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is a central measurement to know and can tell you what kind of efficiency you can expect from your system. If you are unsure of your AFUE, this percentage can be verified at your next furnace service appointment from one of our specialists at Precision Mechanical.

So, what does this AFUE rating mean for you? What types of things should you think on with AFUE?


  • The older your furnace is, the littler its AFUE will also be. This means reduced energy efficiency than with a new furnace in the 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.

Considering the age of your furnace and the potential of overspending on your heating costs has hopefully offered some understanding into the weight of your furnace’s AFUE. There are many factors that go into choosing a new furnace or staying in your furnace service plan. Over time though, smaller efficiency levels can drastically influence your energy usage, monthly bills and ease. Don’t ignore the AFUE rating of your furnace and reflect on it when determining whether it’s time for furnace replacement.

If you have any further uncertainties about furnaces, or you just want some help finding the AFUE rating of your existing furnace, give our professionals at Precision Mechanical a call at 605-206-2564.