Furnace Service, AFUE and What They Mean for You in Mankato area

Strange temperature changes and the hope of early spring can mess with us as we wait until the end of winter. With the random weather this time of year, it’s vital to ensure that your furnace service is complete and that your furnace is ready for any weather change. Part of having and using a furnace is being familiar with the system and knowing when it might need repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is a significant measurement to know and can inform you what kind of effectiveness you can anticipate from your system. If you are unaware of your AFUE, this percentage can be clarified at your next furnace tune-up appointment from one of our specialists at Northern Comfort Inc.

So, what does this AFUE rating suggest 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 not as much energy efficiency compared to a new furnace each winter when your system is in use.
  • Consider your AFUE percentage with regard to money – if your AFUE is 75%, that means that for every $100 you spend on 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 provided some insight into the weight of your furnace’s AFUE. There are many factors that go into selecting a new furnace or sticking to your furnace service plan. Over time however, smaller efficiency levels can significantly impact your energy usage, monthly bills and coziness. Don’t disregard the AFUE rating of your furnace and consider it when determining whether it’s time for furnace replacement.

If you have any further questions about furnaces, or you just want some help verifying the AFUE rating of your existing furnace, give our professionals at Northern Comfort Inc a call at 507-387-6596.

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