picture of a man lowering his heating bill by learning about AFUE

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

Curious temperature changes and the desire for early spring can let us down as we wait until the end of the winter season. With the erratic weather this time of year, it’s vital to ensure that your furnace service is done and that your furnace is prepared for any weather change. Part of having and operating a furnace is being familiar with the system and preparing for 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 effectiveness you can look for 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 professionals at B & G HVAC.

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 lower its AFUE will also be. This means less energy efficiency than with a new furnace in the 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 use heating your home, only $75 is spent to heat your home.

Considering the age of your furnace and the potential of overspending on your heating costs has hopefully offered some insight into the importance of your furnace’s AFUE. There are many elements that go into choosing a new furnace or sticking to your furnace service plan. Over time however, decreased efficiency levels can radically effect your energy usage, monthly bills and coziness. Don’t disregard the AFUE rating of your furnace and think of it when deciding 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 current furnace, give our professionals at B & G HVAC a call at 641-752-3429 or schedule an appointment with us online.