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

Strange 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 done and that your furnace is prepared for any weather change. Part of owning and operating a furnace is knowing the system and knowing when it might call for repair or maintenance. A furnace’s AFUE (Annual Furnace Utilization Efficiency) is a significant measurement to recognize and can disclose to you what kind of efficiency you can expect from your system. If you are unsure of your AFUE, this percentage can be determined at your next furnace tune-up appointment from one of our specialists at Brogan Heating & AC Inc.

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


  • The older your furnace is, the lower its AFUE will also be. This means reduced 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 use heating your home, only $75 is spent to heat your home.

Bearing in mind the age of your furnace and the likelihood of overspending on your heating costs has hopefully provided some understanding into the importance of your furnace’s AFUE. There are many factors that go into picking a new furnace or staying in your furnace service plan. Over time though, lower efficiency levels can significantly effect your energy usage, monthly bills and comfort. 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 verifying the AFUE rating of your present furnace, give our experts at Brogan Heating & AC Inc a call at 507-218-0088.

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