Furnace Service, AFUE and What They Mean for You in Norco and St. Charles Parish

December 31, 2015

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 erratic weather this time of year, it’s important to ensure that your furnace service is done and that your furnace is prepared for any weather shift. Part of having and utilizing a furnace is understanding the system and knowing when it might require repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is an important measurement to recognize and can tell you what kind of efficiency you can look for from your system. If you are unaware of your AFUE, this percentage can be determined at your next furnace service appointment from one of our specialists at Mayeuxs AC & Heating.

So, what does this AFUE rating mean for you? What kinds of things should you consider with AFUE?


  • The older your furnace is, the smaller its AFUE will also be. This means less energy efficiency paralleled 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 being used to heat your home.

Considering the age of your furnace and the potential of overspending on your heating costs has hopefully given some understanding into the significance of your furnace’s AFUE. There are many things that go into picking a new furnace or sticking to your furnace service plan. Over time still, lower efficiency levels can radically influence your energy usage, monthly bills and coziness. 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 questions about furnaces, or you just want some help determining the AFUE rating of your present furnace, give our professionals at Mayeuxs AC & Heating a call at (985) 764-2426.