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

Interesting temperature changes and the hope of early spring can let us down as we wait until the end of winter. With the erratic weather this time of year, it’s important to make sure that your furnace service is complete and that your furnace is prepared for any weather change. Part of having and operating a furnace is knowing the system and understanding when it might call for repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is an important measurement to know and can disclose to you what kind of effectiveness you can expect from your system. If you are unsure of your AFUE, this percentage can be verified at your next furnace tune-up appointment from one of our specialists at Kelley 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 every 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 use heating your home, only $75 is taken to heat your home.

Taking into account the age of your furnace and the possibility of overspending on your heating costs has hopefully given some perception into the importance of your furnace’s AFUE. There are many factors that go into picking a new furnace or sticking to your furnace service plan. Over time though, smaller efficiency levels can drastically impact your energy usage, monthly bills and coziness. Don’t ignore the AFUE rating of your furnace and consider it when choosing whether it’s time for furnace replacement.

If you have any further inquiries about furnaces, or you just want some help finding the AFUE rating of your present furnace, give our professionals at Kelley Mechanical a call at 859-209-3003.

Back To Blog