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

Furnace Service, AFUE and What They Mean for You in Saint Louis

Interesting temperature changes and the hope of early spring can let us down as we wait until the end of the winter season. With the random weather this time of year, it’s important to make sure that your furnace service is taken care of and that your furnace is ready for any weather swing. Part of owning and operating a furnace is being familiar with the system and understanding when it might require repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is a central measurement to recognize and can tell you what kind of productivity you can expect from your system. If you are unaware of your AFUE, this percentage can be determined at your next furnace tune-up appointment from one of our specialists at Morgner Incorporated Air Conditioning & Heating.

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


  • The older your furnace is, the littler its AFUE will also be. This means reduced energy efficiency paralleled to a new furnace every winter when your system is in use.
  • Think about your AFUE percentage proportionate 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 likelihood of overspending on your heating costs has hopefully offered some insight into the significance of your furnace’s AFUE. There are many things that go into choosing a new furnace or remaining with your furnace service plan. Over time still, smaller efficiency levels can radically influence your energy usage, monthly bills and comfort. Don’t ignore the AFUE rating of your furnace and think of it when determining whether it’s time for furnace replacement.

If you have any further inquiries about furnaces, or you just want some help determining the AFUE rating of your current furnace, give our specialists at Morgner Incorporated Air Conditioning & Heating a call at 314-961-0875 or schedule an appointment with us online.