Furnace Service, AFUE and What They Mean for You in Rapid City

Strange temperature changes and the expectation of early spring can mess with us as we wait until the end of the winter season. With the unpredictable weather this time of year, it’s vital to make sure that your furnace service is complete and that your furnace is set for any weather change. Part of owning and using a furnace is understanding the system and understanding when it might call for repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is a significant measurement to know and can tell you what kind of efficiency you can expect from your system. If you are unsure of your AFUE, this percentage can be verified at your next furnace service appointment from one of our experts at Street Heating and Cooling.

So, what does this AFUE rating mean for you? What types of things should you take into account with AFUE?


  • The older your furnace is, the littler 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.
  • Think about your AFUE percentage proportionate to money – if your AFUE is 75%, that means that for every $100 you use heating your home, only $75 is being used to heat your home.

Considering the age of your furnace and the likelihood of overspending on your heating costs has hopefully given some perception into the significance of your furnace’s AFUE. There are many elements that go into choosing a new furnace or staying in your furnace service plan. Over time still, smaller efficiency levels can radically influence your energy usage, monthly bills and ease. Don’t disregard 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 finding the AFUE rating of your existing furnace, give our professionals at Street Heating and Cooling a call at 605-206-3915.

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