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

December 31, 2015

Interesting temperature changes and the desire for early spring can mess with us as we wait until the end of the cold season. With the erratic weather this time of year, it’s vital to make sure that your furnace service is taken care of and that your furnace is prepared for any weather swing. 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 disclose to you what kind of effectiveness you can anticipate 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 experts at B & G HVAC.

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 smaller its AFUE will also be. This means less energy efficiency than with a new furnace every 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.

Bearing in mind the age of your furnace and the potential of overspending on your heating costs has hopefully offered some perception into the importance of your furnace’s AFUE. There are many elements that go into choosing a new furnace or remaining with your furnace service plan. Over time however, smaller efficiency levels can radically effect your energy usage, monthly bills and ease. 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 specialists at B & G HVAC a call at 641-323-1210.